Santander Consumer USA (SC) 10-Q27 Oct 212021 Q3 Quarterly reportFinancial data

Company Profile

Cover Page

Cover Page - shares	9 Months Ended
Cover Page - shares	Sep. 30, 2021	Oct. 25, 2021
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2021
Document Transition Report	false
Entity File Number	001-36270
Entity Registrant Name	SANTANDER CONSUMER USA HOLDINGS INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	32-0414408
Entity Address, Address Line One	1601 Elm Street
Entity Address, Address Line Two	Suite 800
Entity Address, City or Town	Dallas
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	75201
City Area Code	214
Local Phone Number	634-1110
Title of 12(b) Security	Common Stock ($0.01 par value)
Trading Symbol	SC
Security Exchange Name	NYSE
Entity Common Stock, Shares Outstanding (in shares)		306,111,379
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Shell Company	false
Entity Central Index Key	0001580608
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Amendment Flag	false

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
ASSETS
Cash and cash equivalents - $2,016,932 and $32,490 held at affiliates, respectively	$ 2,106,405	$ 109,053
Finance receivables held for sale, net	359,561	1,567,527
Finance receivables held for investment, at amortized cost	33,183,439	33,114,638
Allowance for credit loss	(5,699,698)	(6,110,633)
Finance receivables held for investment, at amortized cost, net	27,483,741	27,004,005
Restricted cash - $6,808 and $27 held at affiliates, respectively	2,248,667	2,221,094
Accrued interest receivable	323,469	415,765
Leased vehicles, net	15,529,610	16,391,107
Furniture and equipment, net of accumulated depreciation of $116,431 and $104,452, respectively	62,168	62,032
Goodwill	74,056	74,056
Intangible assets, net of amortization of $70,984 and $63,488, respectively	75,176	70,128
Other assets - $6,956 and $14,451 held at affiliates, respectively	811,597	972,726
TOTAL ASSETS	49,074,450	48,887,493
LIABILITIES
Borrowings and other debt obligations - $9,600,000 and $10,801,318 to/from affiliates, respectively	38,431,858	41,138,674
Deferred tax liabilities, net	1,855,859	1,263,796
Accounts payable and accrued expenses - $74,945 and $80,428 held at affiliates, respectively	554,581	531,369
Other liabilities - $2,368 and $463 held at affiliates, respectively	299,422	331,693
TOTAL LIABILITIES	41,141,720	43,265,532
Commitments and contingencies (Notes 7 and 14)
STOCKHOLDERS' EQUITY:
Common stock, $0.01 par value - 1,100,000,000 shares authorized; 363,536,761 and 363,159,613 shares issued and 306,111,379 and 306,091,978 shares outstanding, respectively	3,061	3,061
Additional paid-in capital	391,343	393,800
Accumulated other comprehensive income (loss), net of taxes	(31,194)	(50,566)
Retained earnings	7,569,520	5,275,666
TOTAL STOCKHOLDERS' EQUITY	7,932,730	5,621,961
TOTAL LIABILITIES AND EQUITY	$ 49,074,450	$ 48,887,493

CONDENSED CONSOLIDATED BALANC_2

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
ASSETS
Cash and cash equivalents held for affiliates	$ 2,016,932	$ 32,490
Restricted cash held for affiliates	6,808	27
Accumulated depreciation	116,431	104,452
Amortization	70,984	63,488
Other assets held at affiliates	6,956	14,451
LIABILITIES
Total borrowings and other debt obligations from/to affiliates	9,600,000	10,801,318
Accounts payable and accrued expenses held at affiliates	74,945	80,428
Other liabilities held at affiliates	$ 2,368	$ 463
STOCKHOLDERS' EQUITY:
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	1,100,000,000	1,100,000,000
Common stock, shares issued (in shares)	363,536,761	363,159,613
Common stock, shares outstanding (in shares)	306,111,379	306,091,978

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Interest on finance receivables and loans	$ 1,215,121	$ 1,300,694	$ 3,749,264	$ 3,811,113
Leased vehicle income	670,334	725,156	2,115,134	2,210,684
Other finance and interest income	1,631	2,146	6,125	12,354
Total finance and other interest income	1,887,086	2,027,996	5,870,523	6,034,151
Interest expense — Including $77,407, $87,851 , $247,327 and $221,676 to affiliates, respectively	218,747	292,118	709,479	929,934
Leased vehicle expense	325,259	467,172	1,043,774	1,630,945
Net finance and other interest income	1,343,080	1,268,706	4,117,270	3,473,272
Credit loss expense/(benefit)	42,058	340,548	(85,484)	2,110,331
Net finance and other interest income after credit loss expense	1,301,022	928,158	4,202,754	1,362,941
Profit sharing	41,009	30,414	158,888	56,239
Net finance and other interest income after credit loss expense and profit sharing	1,260,013	897,744	4,043,866	1,306,702
Investment gains (losses), net	5,241	(68,989)	(7,057)	(279,997)
Servicing fee income — Including $9,916, $10,050, $29,217 and $33,923 from affiliates, respectively	19,975	18,574	61,481	56,797
Fees, commissions, and other — Including $2,965, $1,254, $10,429 and $11,127 from affiliates, respectively	48,867	78,924	200,242	256,123
Total other income	74,083	28,509	254,666	32,923
Compensation and benefits	149,669	127,991	460,014	388,960
Repossession expense	33,349	35,910	117,540	115,861
Other expenses — Including $2,144, $1,456, $5,679 and $3,762 to affiliates, respectively	179,147	99,761	382,313	308,193
Total operating expenses	362,165	263,662	959,867	813,014
Income before income taxes	971,931	662,591	3,338,665	526,611
Income tax expense	208,607	172,476	775,484	137,161
Net income	763,324	490,115	2,563,181	389,450
Other comprehensive income (loss):
Unrealized gains (losses) on cash flow hedges, net of tax of $2,006, $2,083, $6,568 and $(10,419) respectively	5,962	7,112	20,372	(31,726)
Unrealized gains (losses) on available-for-sale and held-to-maturity debt securities net of tax of $(100), $(88), $(324) and $500, respectively	(301)	(289)	(1,000)	1,537
Comprehensive income	$ 768,985	$ 496,938	$ 2,582,553	$ 359,261
Net income per common share (basic) (in dollars per share)	$ 2.49	$ 1.58	$ 8.37	$ 1.21
Net income per common share (diluted) (in dollars per share)	2.49	1.58	8.37	1.21
Dividends declared per common share (in dollars per share)	$ 0.22	$ 0.22	$ 0.88	$ 0.66
Weighted average common shares (basic) (in shares)	306,093,379	310,150,293	306,086,399	321,275,907
Weighted average common shares (diluted) (in shares)	306,378,733	310,307,265	306,354,463	321,492,331

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Interest expense to affiliates	$ 77,407	$ 87,851	$ 247,327	$ 221,676
Servicing fee income from affiliates	9,916	10,050	29,217	33,923
Fees, commissions and other from affiliates	2,965	1,254	10,429	11,127
Other operating costs to affiliates	2,144	1,456	5,679	3,762
Change in unrealized gains (losses) on cash flow hedges, tax	2,006	2,083	6,568	(10,419)
Unrealized gain/losses on available-for-sale securities, tax	$ (100)	$ (88)	$ (324)	$ 500

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Retained EarningsCumulative Effect, Period of Adoption, Adjustment
Beginning balance (in shares) at Dec. 31, 2019			339,202,000
Beginning balance at Dec. 31, 2019	$ 7,318,620		$ 3,392	$ 1,173,262	$ (26,693)	$ 6,168,659
Beginning balance (ASU 2016-13) at Dec. 31, 2019		$ (1,590,885)					$ (1,590,885)
Beginning balance (ASU 2019-12) at Dec. 31, 2019		$ (382)					$ (382)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued in connection with employee incentive compensation plans (in shares)			340,000
Stock issued in connection with employee incentive compensation plans	(1,506)		$ 3	(1,509)
Stock-based compensation expense	$ 6,161			6,161
Stock repurchase/Treasury stock (in shares)	(33,471,268,000)		(33,471,000)
Stock repurchase/Treasury stock	$ (775,970)		$ (334)	(775,636)
Dividends-Common stock	(212,637)					(212,637)
Tax sharing with affiliate	(7,850)			(7,850)
Net income	389,450					389,450
Other comprehensive income (loss), net of taxes	(30,189)				(30,189)
Ending balance (in shares) at Sep. 30, 2020			306,071,000
Ending balance at Sep. 30, 2020	5,094,812		$ 3,061	394,428	(56,882)	4,754,205
Beginning balance (in shares) at Jun. 30, 2020			316,235,000
Beginning balance at Jun. 30, 2020	4,895,465		$ 3,162	624,554	(63,705)	4,331,454
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued in connection with employee incentive compensation plans (in shares)			34,000
Stock issued in connection with employee incentive compensation plans	237			237
Stock-based compensation expense	$ 1,010			1,010
Stock repurchase/Treasury stock (in shares)	(10,198,800)		(10,198,000)
Stock repurchase/Treasury stock	$ (223,516)		$ (101)	(223,415)
Dividends-Common stock	(67,364)					(67,364)
Tax sharing with affiliate	(7,958)			(7,958)
Net income	490,115					490,115
Other comprehensive income (loss), net of taxes	6,823				6,823
Ending balance (in shares) at Sep. 30, 2020			306,071,000
Ending balance at Sep. 30, 2020	$ 5,094,812		$ 3,061	394,428	(56,882)	4,754,205
Beginning balance (in shares) at Dec. 31, 2020	306,091,978		306,092,000
Beginning balance at Dec. 31, 2020	$ 5,621,961		$ 3,061	393,800	(50,566)	5,275,666
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued in connection with employee incentive compensation plans (in shares)			377,000
Stock issued in connection with employee incentive compensation plans	(1,971)		$ 4	(1,975)
Stock-based compensation expense	$ 8,989			8,989
Stock repurchase/Treasury stock (in shares)	(357,747)		(358,000)
Stock repurchase/Treasury stock	$ (9,475)		$ (4)	(9,471)
Dividends-Common stock	(269,327)					(269,327)
Net income	2,563,181					2,563,181
Other comprehensive income (loss), net of taxes	$ 19,372				19,372
Ending balance (in shares) at Sep. 30, 2021	306,111,379		306,111,000
Ending balance at Sep. 30, 2021	$ 7,932,730		$ 3,061	391,343	(31,194)	7,569,520
Beginning balance (in shares) at Jun. 30, 2021			306,081,000
Beginning balance at Jun. 30, 2021	7,229,630		$ 3,060	389,890	(36,855)	6,873,535
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued in connection with employee incentive compensation plans (in shares)			30,000
Stock issued in connection with employee incentive compensation plans	220		$ 1	219
Stock-based compensation expense	$ 1,234			1,234
Stock repurchase/Treasury stock (in shares)	0
Dividends-Common stock	$ (67,339)					(67,339)
Net income	763,324					763,324
Other comprehensive income (loss), net of taxes	$ 5,661				5,661
Ending balance (in shares) at Sep. 30, 2021	306,111,379		306,111,000
Ending balance at Sep. 30, 2021	$ 7,932,730		$ 3,061	$ 391,343	$ (31,194)	$ 7,569,520

CONDENSED CONSOLIDATED STATEM_4

CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Stockholders' Equity [Abstract]
Dividends declared per common share (in dollars per share)	$ 0.22	$ 0.22	$ 0.88	$ 0.66

CONDENSED CONSOLIDATED STATEM_5

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities:
Net income		$ 2,563,181	$ 389,450
Adjustments to reconcile net income to net cash provided by operating activities
Derivative mark to market		(1,205)	10,022
Credit loss expense/(benefit)		(85,484)	2,110,331
Depreciation, amortization and accretion		1,262,383	1,711,125
Originations and purchases of receivables held for sale		(1,171,287)	(1,637,194)
Proceeds from sales and collections on retail installment contracts held for sale	[1]	1,747,471	545,293
Investment losses, net		7,057	279,997
Stock-based compensation		8,989	6,161
Deferred tax expense		585,820	142,554
Net change in:
Revolving personal loans		34,247	(59,096)
Other assets		135,023	(203,634)
Other liabilities		45,380	(43,067)
Net cash provided by operating activities		5,131,575	3,251,942
Cash flows from investing activities:
Originations and purchases of portfolios on finance receivables held for investment		(13,816,075)	(12,782,253)
Collections on finance receivables held for investment		11,685,416	9,223,448
Proceeds from sales of retail installment contracts held for sale, originated as held for investment	[2]	2,356,205	803,614
Leased vehicles purchased		(5,896,254)	(4,891,504)
Proceeds from sale of leased vehicles		5,444,161	3,094,294
Manufacturer incentives received		73,920	339,717
Change in revolving personal loans, net		31,121	75,318
Proceeds from repayments and maturities of available-for-sale securities		5,000	0
Purchases of held-to-maturity investment securities		0	(54,584)
Proceeds from repayments and maturities of held-to-maturity securities		33,987	4,203
Purchases of furniture and equipment		(20,557)	(18,117)
Sales of furniture and equipment		13,580	3
Net cash used in investing activities		(89,496)	(4,205,861)
Cash flows from financing activities:
Proceeds from borrowings and other debt obligations, net of debt issuance costs - $4,731,607 and $11,545,000 from affiliates, respectively		28,769,569	37,972,329
Payments on borrowings and other debt obligations - $(5,931,607) and $(5,995,000) to affiliates, respectively		(31,508,722)	(35,818,793)
Proceeds from stock option exercises, gross		801	673
Shares repurchased		(9,475)	(775,970)
Dividends paid		(269,327)	(212,637)
Net cash provided by (used in) financing activities		(3,017,154)	1,165,602
Net increase (decrease) in cash and cash equivalents and restricted cash		2,024,925	211,683
Cash and cash equivalents and restricted cash— Beginning of year		2,330,147	2,161,087
Cash and cash equivalents and restricted cash— End of year		4,355,072	2,372,770
Supplemental cash flow information:
Cash and cash equivalents		2,106,405	105,616
Restricted cash		2,248,667	2,267,154
Total cash, cash equivalents and restricted cash		$ 4,355,072	$ 2,372,770

[1]	Included in this balance is sales proceeds from Bluestem portfolio sale of $608 million for loans originated as held for sale.
[2]	Included in this balance is sales proceeds from Bluestem portfolio sale of $188 million for loans originated as held for investment.

CONDENSED CONSOLIDATED STATEM_6

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020
Cash flows from financing activities:
Proceeds from borrowings and other debt obligations, net of debt issuance costs, from affiliates		$ 4,731,607	$ 11,545,000
Payments on borrowings and other debt obligations, to affiliates		(5,931,607)	(5,995,000)
Proceeds from sales and collections on retail installment contracts held for sale	[1]	1,747,471	545,293
Proceeds from sales of retail installment contracts held for sale, originated as held for investment	[2]	2,356,205	$ 803,614
Consumer Portfolio Segment \| Personal Loans
Cash flows from financing activities:
Proceeds from sales and collections on retail installment contracts held for sale		608,000
Proceeds from sales of retail installment contracts held for sale, originated as held for investment		$ 188,000

[1]	Included in this balance is sales proceeds from Bluestem portfolio sale of $608 million for loans originated as held for sale.
[2]	Included in this balance is sales proceeds from Bluestem portfolio sale of $188 million for loans originated as held for investment.

Description of Business, Basis

Description of Business, Basis of Presentation, and Accounting Policies	9 Months Ended
	Sep. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business, Basis of Presentation, and Accounting Policies	Description of Business, Basis of Presentation, and Accounting Policies The Company is the holding company for SC Illinois, and its subsidiaries, a specialized consumer finance company focused on vehicle finance and third-party servicing and delivering service to dealers and customers across the full credit spectrum. The Company’s primary business is the indirect origination and servicing of retail installment contracts and leases, principally, through manufacturer-franchised dealers in connection with their sale of new and used vehicles to retail consumers. Additionally, the Company sells consumer retail installment contracts through flow agreements and, when market conditions are favorable, it accesses the ABS market through securitizations of consumer retail installment contracts. SAF is our primary vehicle financing brand and is available as a finance option for automotive dealers across the United States. Since May 2013, under the MPLFA with Stellantis, the Company has operated as Stellantis’s preferred provider for consumer loans, leases and dealer loans and provides services to Stellantis customers and dealers under the CCAP brand. These products and services include consumer retail installment contracts and leases, as well as dealer loans for inventory, construction, real estate, working capital and revolving lines of credit. The Company also originates vehicle loans through a web-based direct lending program, purchases vehicle retail installment contracts from other lenders, and services automobile and recreational and marine vehicle portfolios for other lenders. Additionally, the Company has other relationships through which it provides other consumer finance products. As of September 30, 2021, the Company was owned approximately 80.2% by SHUSA, a subsidiary of Santander, and approximately 19.8% by other shareholders. In August 2021, the Company entered into a definitive agreement whereby SHUSA agreed to acquire all of the outstanding shares of the common stock of the Company not already owned by SHUSA via an all-cash tender offer. Under the terms of the definitive agreement, a wholly-owned subsidiary of SHUSA commenced a tender offer to acquire all of the outstanding shares of the Company's common stock that SHUSA does not yet own at a price of $41.50 per share in cash. SHUSA agreed to acquire all remaining shares not tendered in the offer through a second- step merger at the same price as in the tender offer. Consummation of the tender offer is subject to various conditions, including regulatory approval of the Board of Governors of the Federal Reserve System and other customary conditions. Upon completion of the transaction, the Company would become a wholly-owned subsidiary of SHUSA. During the first quarter of 2021, the Company completed the sale of the Bluestem personal lending portfolio to a third party. In addition, the Company executed a forward flow sale agreement with a third party to purchase new advances of all personal lending receivables that the Company purchases from Bluestem through the term of the agreement with Bluestem. Basis of Presentation The accompanying condensed consolidated financial statements include the accounts of the Company and its consolidated subsidiaries, including certain Trusts that are considered VIEs. The Company also consolidates other VIEs for which it is deemed to be the primary beneficiary. All significant intercompany balances and transactions have been eliminated in consolidation. These condensed consolidated financial statements have been prepared in accordance with GAAP and pursuant to SEC regulations. In the opinion of management, the accompanying condensed consolidated financial statements reflect all adjustments of a normal and recurring nature necessary for a fair statement of the Consolidated Balance Sheets, Statements of Operations, Statements of Comprehensive Income, Statements of Stockholder's Equity and Statement of Cash Flow for the interim periods indicated, and contain adequate disclosure to make the information presented not misleading. Results of operations for the periods presented herein are not necessarily indicative of results of operations for the entire year. These financial statements should be read in conjunction with the Annual Report of the Company on Form 10-K for the year ended December 31, 2020 (the "2020 Annual Report on Form 10-K"). Use of Estimates The preparation of condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts in the financial statements and accompanying notes. Actual results could differ from those estimates and those differences may be material. The most significant estimates include the determination of credit loss allowance, fair value measurements, expected end-of-term lease residual values, and income taxes. These estimates, although based on actual historical trends and modeling, may show significant variances over time. Business Segment Information The Company has one reportable segment, Consumer Finance, which includes the Company’s vehicle financial products and services, including retail installment contracts, vehicle leases, and financial products and services related to recreational vehicles and marine vehicles. Accounting Policies There have been no changes in the Company's accounting policies from those disclosed in Part II, Item 8 - Financial Statements and Supplementary Data in the 2020 Annual Report on Form 10-K.

Finance Receivables

Finance Receivables	9 Months Ended
Finance Receivables	Sep. 30, 2021
Receivables [Abstract]
Finance Receivables	Finance Receivables Held for Investment Finance receivables held for investment, net is comprised of the following at September 30, 2021 and December 31, 2020: September 30, 2021 December 31, 2020 Retail installment contracts, net (a) $ 27,461,064 $ 26,975,368 Purchased receivables - credit deteriorated 1,440 6,197 Finance lease receivables (Note 4) 21,237 22,440 Finance receivables held for investment, net $ 27,483,741 $ 27,004,005 (a) The Company has elected the fair value option for certain retail installment contracts reported in finance receivables held for investment, net. As of September 30, 2021 and December 31, 2020, $6,170 and $5,614 of loans were recorded at fair value, respectively (Note 10). The Company’s held for investment portfolio of retail installment contracts is comprised of the following at September 30, 2021 and December 31, 2020: September 30, 2021 Retail Installment Contracts Non-TDR TDR Unpaid principal balance $ 28,779,433 $ 3,952,344 ACL (4,398,303) (1,297,841) Discount/(premium) (net of subvention and participation) 326,675 (3,601) Capitalized origination costs and fees 98,549 3,808 Net carrying balance $ 24,806,354 $ 2,654,710 ACL as a percentage of unpaid principal balance 15.3 % 32.8 % ACL and discount as a percentage of unpaid principal balance 14.1 % 32.9 % December 31, 2020 Retail Installment Contracts Non-TDR TDR Unpaid principal balance $ 28,977,299 $ 3,945,040 ACL (4,792,464) (1,314,170) Discount (net of subvention and participation) 66,373 (8,389) Capitalized origination costs and fees 97,638 4,041 Net carrying balance $ 24,348,846 $ 2,626,522 ACL as a percentage of unpaid principal balance 16.5 % 33.3 % ACL and discount as a percentage of unpaid principal balance 16.3 % 33.5 % Retail installment contracts Retail installment contracts are collateralized by vehicle titles, and the Company has the right to repossess the vehicle in the event the consumer defaults on the payment terms of the contract. Most of the Company’s retail installment contracts held for investment are pledged against warehouse lines or securitization bonds (Note 7). Most of the borrowers on the Company’s retail installment contracts held for investment are retail consumers; however, $973,205 and $864,680 of the unpaid principal balance represented fleet contracts with commercial borrowers as of September 30, 2021 and December 31, 2020, respectively. During the nine months ended September 30, 2021 and 2020, the Company originated (including through the SBNA originations program) $11,125,634 and $11,145,890, respectively, in CCAP loans which represented 53% and 61%, respectively, of the total retail installment contract originations (including the SBNA originations program). As of September 30, 2021, borrowers on the Company’s retail installment contracts held for investment are located in Texas (17%), Florida (11%), California (8%), Georgia (5%) and other states each individually representing less than 5% of the Company’s total portfolio. Purchased receivables During the three and nine months ended September 30, 2021 and 2020, the company purchased financial receivables from third party lenders for $67,018, and zero, respectively. The unpaid principal balance of these loans as of the acquisition date was $112,061 and zero, respectively. During the three and nine months ended September 30, 2021 and 2020, the Company recognized certain retail installment contracts with an unpaid principal balance of $42,264, $42,264, zero and $76,878, respectively, previously held by non-consolidated securitization Trusts, under optional clean-up calls (Note 6). Following the initial recognition of these loans at fair value, the performing loans in the portfolio are carried at amortized cost, net of allowance for credit losses. The Company elected the fair value option for all non-performing loans acquired (more than 60 days delinquent as of the re-recognition date), for which it was probable that not all contractually required payments would be collected (Note 10). Held for Sale The carrying value of the Company’s finance receivables held for sale, net is comprised of the following at September 30, 2021 and December 31, 2020: September 30, 2021 December 31, 2020 Retail installment contracts acquired individually $ 359,561 $ 674,048 Personal loans (a) — 893,479 (a) On March 31, 2021, the Company sold the personal lending portfolio. Refer to Note 1 – “Description of Business, Basis of Presentation, and Accounting Principles” to these Condensed Consolidated Financial Statements for more information. Sales of retail installment contracts, personal loans to third parties (unpaid principal balance), and proceeds from sales of charged-off assets for the three and nine months ended September 30, 2021 and 2020 were as follows: Three Months Ended Nine Months Ended September 30, 2021 September 30, 2020 September 30, 2021 September 30, 2020 Sales of retail installment contracts to third parties $ 277,898 $ 636,301 $ 2,968,467 $ 1,148,587 Sales of Personal Loans to third parties — — 1,253,746 — Proceeds from sales of charged-off assets to third parties — 9,144 13,901 30,019

Allowance for Credit Loss and C

Allowance for Credit Loss and Credit Quality	9 Months Ended
Allowance for Credit Loss and Credit Quality	Sep. 30, 2021
Credit Loss [Abstract]
Allowance for Credit Loss and Credit Quality	Allowance for Credit Loss and Credit Quality Allowance for Credit Loss The Company maintains an ACL on the retail installment contracts held for investment, excluding those loans measured at fair value in accordance with applicable accounting standards. The Company maintains an expected ACL for receivables from dealers based on risk ratings and individually evaluates loans for specific impairment as necessary. The Company estimates losses on the finance lease receivable portfolio based on delinquency status, loss experience to date, future expectation of losses as well as various economic factors. Retail installment contracts The activity in the ACL for the retail installment contracts for the three and nine months ended September 30, 2021 and 2020 was as follows: Three Months Ended September 30, 2021 September 30, 2020 Retail Installment Contracts Non-TDR TDR Non-TDR TDR Balance — beginning of period $ 4,299,670 $ 1,514,994 $ 4,818,187 $ 1,037,628 Credit loss expense (benefit) 188,195 (144,772) 24,841 314,075 Charge-offs (427,659) (206,111) (334,938) (200,352) Recoveries 338,097 133,730 392,042 97,171 Balance — end of period $ 4,398,303 $ 1,297,841 $ 4,900,132 $ 1,248,522 Nine Months Ended September 30, 2021 September 30, 2020 Retail Installment Contracts Non-TDR TDR Non-TDR TDR Balance — beginning of period $ 4,792,464 $ 1,314,170 $ 2,123,878 $ 914,718 Day 1 - Adjustment to allowance for adoption of CECL standard — — 2,030,473 71,833 Credit loss expense (benefit) (252,963) 169,268 1,526,545 581,344 Charge-offs (a) (1,356,482) (599,083) (1,955,706) (617,536) Recoveries 1,215,284 413,486 1,174,942 298,163 Balance — end of period $ 4,398,303 $ 1,297,841 $ 4,900,132 $ 1,248,522 (a) Charge-offs decreased significantly, primarily driven by macro-economic improvements. Additionally, Charge-offs for retail installment contracts includes partial write-down of loans to the collateral value less estimated costs to sell, for which a bankruptcy notice was received. There is no additional ACL on these loans. The credit risk in the Company’s loan portfolios is driven by credit and collateral quality, and is affected by borrower- specific and economy-wide factors. In general, there is an inverse relationship between credit quality of loans and projections of impairment losses so that loans with better credit quality require a lower expected loss. The Company manages this risk through its underwriting, pricing strategies, credit policy standards, and servicing guidelines and practices, as well as through the application of geographic and other concentration limits. The Company estimates current expected credit losses based on prospective information as well as account level models based on historical data. Unemployment, HPI, and used vehicle index growth rates, along with loan level characteristics, are the key inputs used in the models for prediction of the likelihood that the borrower will default in the forecasted period (the probability of default). The used vehicle index is also used to estimate the loss in the event of default. The Company has determined the reasonable and supportable period to be three years at which time economic forecasts generally tend to revert to historical averages. The Company utilizes qualitative factors to capture any additional risks that may not be captured in either the economic forecasts or in the historical data, including consideration of the current levels of delinquency and used vehicle prices. The Company generally uses a third-party vendor's consensus baseline macroeconomic scenario for the quantitative estimate and additional positive and negative macroeconomic scenarios to make a qualitative adjustment for macroeconomic uncertainty, and considers adjustments to macroeconomic inputs and outputs based on market volatility. The scenarios used are periodically updated with weightings assigned by management and approved through established committee governance. The Company’s ACL decreased $119 million and $410 million for the three and nine months ended September 30, 2021. The decrease was primarily due to an improved macroeconomic outlook as well as improved credit quality and performance. Other portfolios The ACL for the period end and its activity for the finance lease receivable portfolio and purchased receivable portfolio-credit deteriorated, for the three and nine months ended September 30, 2021 and 2020, was insignificant. Delinquencies Retail installment contracts and personal amortizing term loans are generally classified as non-performing (or nonaccrual) when they are greater than 60 days past due as to contractual principal or interest payments. Dealer receivables are classified as non-performing when they are greater than 90 days past due. At the time a loan is placed in non-performing (nonaccrual) status, previously accrued and uncollected interest is reversed against interest income. If an account is returned to a performing (accrual) status, the Company returns to accruing interest on the loan. When an account is deferred, the loan is returned to accrual status during the deferral period and accrued interest related to the loan is evaluated for collectability. The Company considers an account delinquent when an obligor fails to pay substantially all (defined as 90%) of the scheduled payment by the due date. In each case, the period of delinquency is based on the number of days payments are contractually past due. A summary of delinquencies as of September 30, 2021, and December 31, 2020 is as follows: September 30, 2021 Finance Receivables Held for Investment Retail Installment Contract Loans Purchased Receivables Portfolios - credit deteriorated Total Percent Amortized cost, 30-59 days past due $ 2,253,907 $ 401 $ 2,254,308 6.8 % Amortized cost over 59 days 1,106,673 400 1,107,073 3.3 % Total delinquent balance at amortized cost (a) $ 3,360,580 $ 801 $ 3,361,381 10.1 % (a) The amount of accrued interest excluded from the disclosed amortized cost table is $63,205. December 31, 2020 Finance Receivables Held for Investment Retail Installment Contract Loans Purchased Receivables Portfolios - credit impaired Total Percent Amortized cost, 30-59 days past due $ 1,971,766 $ 687 $ 1,972,453 6.0 % Amortized cost over 59 days 1,038,869 441 1,039,310 3.1 % Total delinquent balance at amortized cost (a) $ 3,010,635 $ 1,128 $ 3,011,763 9.1 % (a) The amount of accrued interest excluded from the disclosed amortized cost table is $73,794. On March 31, 2021, the Company sold the personal lending portfolio. Refer to Note 1 – “Description of Business, Basis of Presentation, and Accounting Principles” to these Condensed Consolidated Financial Statements for more information. The unpaid principal balance on revolving personal loans 90 days past due and still accruing totaled $78,880 as of December 31, 2020. Non-Accrual Loans for Retail Installment Contracts The amortized cost basis of financial instruments that are either non-accrual with related expected credit loss or non-accrual without related expected credit loss for retail installment contracts is as follows: September 30, 2021 Non-accrual loans Non-accrual loans with no allowance (a) Interest income recognized on nonaccrual loans (YTD) Non-accrual loans as a percent of total amortized cost Non-TDR $ 818,292 $ 157,314 $ 46,445 2.5 % TDR 391,834 47,281 26,576 1.2 % Total non-accrual loans $ 1,210,126 $ 204,595 $ 73,021 3.7 % December 31, 2020 Non-accrual loans Non-accrual loans with no allowance (a) Interest income recognized on nonaccrual loans (YTD) Non-accrual loans as a percent of total amortized cost Non-TDR $ 748,026 $ 145,287 $ 72,926 2.3 % TDR 385,021 46,498 35,620 1.2 % Total nonaccrual loans $ 1,133,047 $ 191,785 $ 108,546 3.5 % (a) These represent loans for which a bankruptcy notice was received and that have been partially written down to the collateral value less estimated costs to sell. Accordingly, there is no additional ACL on these loans. Delinquent balances and nonaccrual balances are lower as of December 31, 2020 primarily due to government stimulus payments provided to customers related to COVID-19 pandemic. Credit Quality Indicators FICO® Distribution (determined at origination) — Amortized Cost Basis (in millions) by Origination Year for Retail Installment Contacts Total September 30, 2021 2020 2019 2018 2017 2016 Prior Amount % No-FICO ® s 1,603 1,173 738 337 266 112 50 4,279 12.9% <540 1,573 1,306 948 608 283 151 125 4,994 15.1% 540-599 4,364 3,038 2,030 1,134 413 234 156 11,369 34.3% 600-639 2,828 1,831 1,182 625 201 123 65 6,855 20.7% >=640 (a) 2,345 1,655 853 506 151 105 45 5,660 17.0% Total (b) $ 12,713 $ 9,003 $ 5,751 $ 3,210 $ 1,314 $ 725 $ 441 $ 33,157 100.00% (a) Beginning in 2021, loans with FICO score of 640 are disclosed in the >=640 category. (b) The amount of accrued interest excluded from the disclosed amortized cost table is $323 million . Total December 31, 2020 2019 2018 2017 2016 2015 Prior Amount % No-FICO ® s 1,760 1,151 530 501 247 128 26 4,343 13.1% <540 1,789 1,370 913 454 263 186 90 5,065 15.3% 540-599 4,269 3,005 1,736 673 423 264 96 10,466 31.7% 600-639 2,759 1,838 990 335 230 126 47 6,325 19.1% >640 (a) 4,040 1,411 810 265 200 124 33 6,883 20.8% Total (b) $ 14,617 $ 8,775 $ 4,979 $ 2,228 $ 1,363 $ 828 $ 292 $ 33,082 100.0% (a) As of December 31, 2020, loans with FICO score of 640 were included in the 600-639 category. (b) The amount of accrued interest excluded from the disclosed amortized cost table is $416 million . Troubled Debt Restructurings In certain circumstances, the Company modifies the terms of its finance receivables to financially troubled borrowers. Modifications may include a temporary reduction in monthly payment, reduction in interest rate, an extension of the maturity date, rescheduling of future cash flows, or a combination thereof. A modification of finance receivable terms is considered a TDR if the Company grants a concession to a borrower for economic or legal reasons related to the debtor’s financial difficulties that would not otherwise have been considered. The purchased receivables portfolio - credit deteriorated, operating and finance leases, and loans held for sale are excluded from the scope of the applicable guidance. The Company’s TDR balance as of September 30, 2021 and December 31, 2020 primarily consisted of loans that had been deferred or modified to receive a temporary reduction in monthly payment. As of September 30, 2021 and December 31, 2020, there were no receivables from dealers classified as a TDR. For loans not classified as TDRs, the Company generally estimates an appropriate allowance for credit losses based on delinquency status, the Company’s historical loss experience, estimated values of underlying collateral, and various economic factors. Once a loan has been classified as a TDR, it is generally assessed for impairment based on the present value of expected future cash flows discounted at the loan’s original effective interest rate considering available evidence. For loans that are considered collateral-dependent, such as certain bankruptcy modifications, impairment is measured based on the fair value of the collateral, less its estimated cost to sell. A loan that has been classified as a TDR remains so until the loan is liquidated through payoff or charge-off. The recognition of interest income on TDR loans reflects management’s best estimate of the amount that is reasonably assured of collection and is consistent with the estimate of future cash flows used in the impairment measurement. Any accrued but unpaid interest is fully reserved through the recognition of additional impairment, if not expected to be collected. The table below presents the Company’s amortized cost of TDRs as of September 30, 2021 and December 31, 2020: September 30, 2021 December 31, 2020 Retail Installment Contracts Amortized Cost (including accrued interest) (a) $ 3,980,920 $ 4,011,780 Impairment (1,297,841) (1,314,170) Amortized cost including accrued interest, net of impairment $ 2,683,079 $ 2,697,610 (a) As of September 30, 2021, this balance excludes $56.2 million of collateral-dependent bankruptcy TDRs that have been written down by $8.9 million to fair value less cost to sell. As of December 31, 2020, this balance excludes $67.9 million of collateral-dependent bankruptcy TDRs that have been written down by $21.4 million to fair value less cost to sell. A summary of the amortized cost of the Company’s delinquent TDRs at September 30, 2021 and December 31, 2020 is as follows: September 30, 2021 December 31, 2020 Retail Installment Contracts 30-59 days past due $ 744,637 $ 637,560 Delinquent balance over 59 days 381,840 344,776 Total delinquent TDRs $ 1,126,477 $ 982,336 Average amortized cost and interest income recognized on TDR loans are as follows: Three Months Ended Nine Months Ended September 30, 2021 September 30, 2020 September 30, 2021 September 30, 2020 Retail Installment Contracts Retail Installment Contracts Average amortized cost (including accrued interest) $ 4,142,089 $ 3,960,119 $ 4,203,685 $ 3,802,823 Interest income recognized 212,073 165,637 635,188 457,642 The following table summarizes the financial effects, excluding impacts related to credit loss allowance and impairment, of TDRs that occurred for the three and nine months ended September 30, 2021 and 2020: Three Months Ended Nine Months Ended September 30, 2021 September 30, 2020 September 30, 2021 September 30, 2020 Retail Installment Contracts Retail Installment Contracts Amortized cost (including accrued interest) before TDR $ 219,898 $ 317,455 $ 1,326,077 $ 1,399,813 Amortized cost (including accrued interest) after TDR (a) 220,679 319,027 1,333,257 1,417,480 Number of contracts (not in thousands) 12,063 14,620 67,354 69,786 (a) excluding collateral-dependent bankruptcy TDRs A TDR is considered to be in default at charge-off. For retail installment contracts, charge-off is at the earlier of the date of repossession or 120 days past due. Loan restructurings accounted for as TDRs within the previous twelve months that subsequently defaulted during the three and nine months ended September 30, 2021 and 2020 are summarized in the following table: Three Months Ended Nine Months Ended September 30, 2021 September 30, 2020 September 30, 2021 September 30, 2020 Retail Installment Contracts Retail Installment Contracts Amortized cost (including accrued interest) in TDRs that subsequently defaulted (a)` $ 91,260 $ 83,002 $ 283,914 $ 183,871 Number of contracts (not in thousands) 4,724 4,379 14,496 10,467 (a) For TDR modifications and TDR modifications that subsequently default, the allowance methodology remains unchanged; however, the transition rates of the TDR loans are adjusted to reflect the respective risks.

Leases (SC as Lessor)

Leases (SC as Lessor)	9 Months Ended
Leases (SC as Lessor)	Sep. 30, 2021
Leases [Abstract]
Leases (SC as Lessor)	Leases (SC as Lessor) The Company originates operating and finance leases, which are separately accounted for and recorded on the Company’s condensed consolidated balance sheets. Operating leases are reported as leased vehicles, net, while finance leases are included in finance receivables held for investment, net. For modified or extended leases, income continues to accrue during the extension period and remaining lease payments are recorded on a straight-line basis over the modified lease term. Beginning in the second quarter of 2021, the Company agreed to provide SBNA with origination support services in connection with the processing, underwriting and purchase of vehicle leases, primarily from Stellantis dealers, that are funded and owned by SBNA. In addition, the Company has agreed to perform the servicing for any leases originated on SBNA's behalf. Refer to Note 15 – “Related Party Transactions" for additional information. Operating Leases Leased vehicles, net, which is comprised of leases originated under the MPLFA, consisted of the following as of September 30, 2021 and December 31, 2020: September 30, 2021 December 31, 2020 Leased vehicles $ 20,032,832 $ 22,056,063 Less: accumulated depreciation (3,920,416) (4,796,595) Depreciated net capitalized cost 16,112,416 17,259,468 Manufacturer subvention payments, net of accretion (700,783) (934,381) Origination fees and other costs 117,977 66,020 Net book value $ 15,529,610 $ 16,391,107 The following summarizes the maturity analysis of lease payments due to the Company, as lessor, under operating leases as of September 30, 2021: Remainder of 2021 $ 910,739 2022 2,101,818 2023 1,363,807 2024 286,598 2025 25,093 Thereafter 1,295 Total $ 4,689,350 Finance Leases Certain leases originated by the Company are accounted for as direct financing leases, as the contractual residual values are nominal amounts. Finance lease receivables, net consisted of the following as of September 30, 2021 and December 31, 2020: September 30, 2021 December 31, 2020 Gross investment in finance leases $ 33,498 $ 34,461 Origination fees and other 283 289 Less: unearned income (8,990) (8,311) Net investment in finance leases before allowance 24,791 26,439 Less: allowance for lease losses (3,554) (3,999) Net investment in finance leases $ 21,237 $ 22,440 The following summarizes the maturity analysis of lease payments due to the Company, as lessor, under finance leases as of September 30, 2021: Remainder of 2021 $ 2,688 2022 10,275 2023 8,547 2024 6,509 2025 4,054 Thereafter 1,425 Total $ 33,498
Leases (SC as Lessor)	Leases (SC as Lessor) The Company originates operating and finance leases, which are separately accounted for and recorded on the Company’s condensed consolidated balance sheets. Operating leases are reported as leased vehicles, net, while finance leases are included in finance receivables held for investment, net. For modified or extended leases, income continues to accrue during the extension period and remaining lease payments are recorded on a straight-line basis over the modified lease term. Beginning in the second quarter of 2021, the Company agreed to provide SBNA with origination support services in connection with the processing, underwriting and purchase of vehicle leases, primarily from Stellantis dealers, that are funded and owned by SBNA. In addition, the Company has agreed to perform the servicing for any leases originated on SBNA's behalf. Refer to Note 15 – “Related Party Transactions" for additional information. Operating Leases Leased vehicles, net, which is comprised of leases originated under the MPLFA, consisted of the following as of September 30, 2021 and December 31, 2020: September 30, 2021 December 31, 2020 Leased vehicles $ 20,032,832 $ 22,056,063 Less: accumulated depreciation (3,920,416) (4,796,595) Depreciated net capitalized cost 16,112,416 17,259,468 Manufacturer subvention payments, net of accretion (700,783) (934,381) Origination fees and other costs 117,977 66,020 Net book value $ 15,529,610 $ 16,391,107 The following summarizes the maturity analysis of lease payments due to the Company, as lessor, under operating leases as of September 30, 2021: Remainder of 2021 $ 910,739 2022 2,101,818 2023 1,363,807 2024 286,598 2025 25,093 Thereafter 1,295 Total $ 4,689,350 Finance Leases Certain leases originated by the Company are accounted for as direct financing leases, as the contractual residual values are nominal amounts. Finance lease receivables, net consisted of the following as of September 30, 2021 and December 31, 2020: September 30, 2021 December 31, 2020 Gross investment in finance leases $ 33,498 $ 34,461 Origination fees and other 283 289 Less: unearned income (8,990) (8,311) Net investment in finance leases before allowance 24,791 26,439 Less: allowance for lease losses (3,554) (3,999) Net investment in finance leases $ 21,237 $ 22,440 The following summarizes the maturity analysis of lease payments due to the Company, as lessor, under finance leases as of September 30, 2021: Remainder of 2021 $ 2,688 2022 10,275 2023 8,547 2024 6,509 2025 4,054 Thereafter 1,425 Total $ 33,498

Other Assets

Other Assets	9 Months Ended
Other Assets	Sep. 30, 2021
Other Assets, Leases And Investments [Abstract]
Other Assets	Other Assets Other assets were comprised as follows: September 30, 2021 December 31, 2020 Vehicles (a) $ 269,627 $ 311,557 Manufacturer subvention payments receivable (b) 29,361 57,996 Upfront fee (b) 47,015 69,286 Derivative assets at fair value (c) 13,314 4,740 Derivative - collateral 23,037 92,132 Operating leases (Right-of-use-assets) 61,590 46,441 Available-for-sale debt securities 90,688 95,654 Held-to-maturity debt securities (d) 101,874 44,875 Equity securities not held for trading 2,671 1,380 Prepaids 35,152 45,667 Accounts receivable 28,737 34,607 Federal and State tax receivable 76,113 99,666 Other 32,418 68,725 Other assets $ 811,597 $ 972,726 (a) Includes vehicles recovered through repossession as well as vehicles recovered due to lease terminations. (b) These amounts relate to the MPLFA . The Company paid a $150,000 upfront fee upon the May 2013 inception of the MPLFA . The fee is being amortized into finance and other interest income over a ten-year term. In addition, in June 2019, in connection with the execution of an amendment to the MPLFA , the Company paid a $60,000 upfront fee to Stellantis. This fee is being amortized into finance and other interest income over the remaining term of the MPLFA . (c) Derivative assets at fair value represent the gross amount of derivatives presented in the condensed consolidated financial statements. Refer to Note 9 - "Derivative Financial Instruments" to these Condensed Consolidated Financial Statements for the detail of these amounts. (d) Held-to-maturity debt securities includes accrued interest as of September 30, 2021. Operating Leases (SC as Lessee) The Company has entered into various operating leases, primarily for office space. Operating leases are included within other assets other liabilities Most of our real estate leases include one or more options to renew, with renewal terms that can extend the lease term from one year to 15 years or more. The exercise of lease renewal options is at our sole discretion. The Company does not include any of the renewal options in the lease term as it is not reasonably certain that these options will be exercised. Supplemental information relating to these operating leases is as follows: September 30, 2021 December 31, 2020 Operating leases-right of use assets $ 61,590 $ 46,441 Other liabilities 77,854 64,927 Weighted average lease term 6.2 5.5 Weighted average discount rate 2.7 % 3.4 % Lease expense i ncurred totaled $3,084 and $3,479 for the three months ended September 30, 2021 and 2020, respectively, and $9,577 and $10,586 for the nine months ended September 30, 2021 and 2020, respectively and is included within “other operating costs” in the income statement. Leases with an initial term of 12 months or less are not recorded on the balance sheet; we recognize lease expense for these leases on a straight-line basis over the lease term. Cash paid for amounts included in the measurement of operating lease liabilities was $12,863 and $12,947 during the nine months ended September 30, 2021 and 2020, respectively . The maturity of lease liabilities at September 30, 2021 are as follows: September 30, 2021 2021 $ 4,078 2022 17,409 2023 14,343 2024 14,313 2025 14,397 Thereafter 18,029 Total $ 82,569 Less: Interest (4,715) Present value of lease liabilities $ 77,854 Available-for-sale and Held-to-maturity debt securities Debt securities expected to be held for an indefinite period of time are classified as AFS and are carried at fair value, with temporary unrealized gains and losses reported as a component of accumulated other comprehensive income within stockholder's equity, net of estimated income taxes. These securities are used to satisfy collateral requirements for our derivative financial instruments. Debt securities that the Company has the positive intent and ability to hold until maturity are classified as HTM securities. HTM securities are reported at cost and adjusted for payments, charge-offs, amortization of premium and accretion of discount. These securities are used to meet risk retention requirements under regulatory rules. Realized gains and losses on sales of investment securities are recognized on the trade date and are determined using the specific identification method and are included in earnings within Investment gain (losses) on sale of securities. Unamortized premiums and discounts are recognized in interest income over the estimated life of the security using the interest method. The following tables present the amortized cost, gross unrealized gains and losses and approximate fair values of debt securities available-for-sale and held-to-maturity debt securities: September 30, 2021 Amortized cost (before unrealized gains / losses) Gross Unrealized gain Gross Unrealized loss Fair value Available-for-sale debt securities (US Treasury securities) $ 89,437 $ 1,251 $ — $ 90,688 Held-to-maturity debt securities (Asset-Backed Notes) $ 101,815 $ 634 $ — $ 102,449 Contractual Maturities The contractual maturities of available-for-sale and held-to-maturity debt instruments are summarized in the following table: September 30, 2021 Available-for-sale debt securities Held-to-maturity debt securities Amortized cost Fair value Amortized cost Fair value Due within one year $ 66,924 $ 67,650 $ — $ — Due after one year but within 5 years 22,513 23,038 48,200 48,491 Due after 5 year but within 10 years — — 53,615 53,958 Total $ 89,437 $ 90,688 $ 101,815 $ 102,449 There w ere no transfers of securities between available-for-sale and held-to-maturity periods ended September 30, 2021 or December 31, 2020. The Company did not record an allowance for credit-related losses on available-for-sale and held-to-maturity securities at September 30, 2021 or December 31, 2020. As discussed in Part II, Item 8 – Financial Statements and Supplementary Data (Note 1) in the 2020 Annual Report on Form 10-K, there is no reserve for securities for which management has an expectation that nonpayment of the amortized cost basis is zero. Other Investments

Variable Interest Entities

Variable Interest Entities	9 Months Ended
Variable Interest Entities	Sep. 30, 2021
Variable Interest Entity Disclosure [Abstract]
Variable Interest Entities	Variable Interest Entities The Company transfers retail installment contracts and vehicle leases into newly formed Trusts that then issue one or more classes of notes payable backed by the collateral. The Company’s continuing involvement with these Trusts is in the form of servicing the assets and, generally, through holding residual interests in the Trusts. The Trusts are considered VIEs under GAAP and the Company may or may not consolidate these VIEs on the condensed consolidated balance sheets. For further description of the Company’s securitization activities, involvement with VIEs and accounting policies regarding consolidation of VIEs, see Part II, Item 8 – Financial Statements and Supplementary Data (Note 7) in the 2020 Annual Report on Form 10-K. On-balance sheet variable interest entities The assets of consolidated VIEs, presented based upon the legal transfer of the underlying assets in order to reflect legal ownership, that can be used only to settle obligations of the consolidated VIE and the liabilities of these entities for which creditors (or beneficial interest holders) do not have recourse to the Company’s general credit were as follows: September 30, 2021 December 31, 2020 Assets Restricted cash $ 1,682,654 $ 1,737,021 Finance receivables held for sale, net 113,313 581,938 Finance receivables held for investment, net 21,785,308 22,572,549 Leased vehicles, net 15,529,610 16,391,107 Various other assets 706,130 791,306 Total assets $ 39,817,015 $ 42,073,921 Liabilities Notes payable $ 30,632,558 $ 31,700,709 Various other liabilities 107,743 84,922 Total liabilities $ 30,740,301 $ 31,785,631 Certain amounts shown above are greater than the amounts shown in the corresponding line items in the accompanying condensed consolidated balance sheets due to intercompany eliminations between the VIEs and other entities consolidated by the Company. For example, for most of its securitizations, the Company retains one or more of the lowest tranches of bonds. Rather than showing investment in bonds as an asset and the associated debt as a liability, these amounts are eliminated in consolidation as required by GAAP. The Company retains servicing rights for receivables transferred to the Trusts and receives a monthly servicing fee on the outstanding principal balance. Supplemental fees, such as late charges, for servicing the receivables are reflected in fees, commissions and other income. As of September 30, 2021 and December 31, 2020, the Company was servicing $26,079,950 and $27,658,182, respectively, of gross retail installment contracts that had been transferred to consolidated Trusts. The remainder of the Company’s retail installment contracts remain unpledged. A summary of the cash flows received from consolidated securitization Trusts during the three and nine months ended September 30, 2021 and 2020, is as follows: Three Months Ended Nine Months Ended September 30, 2021 September 30, 2020 September 30, 2021 September 30, 2020 Assets securitized $ 7,095,782 $ 5,282,901 $ 18,457,441 $ 15,845,707 Net proceeds from new securitizations (a) $ 6,591,786 $ 4,662,211 $ 16,168,394 $ 11,470,857 Net proceeds from retained bonds — 1,293 195,967 57,286 Cash received for servicing fees (b) 228,194 242,245 686,789 735,533 Net distributions from Trusts (b) 1,391,970 1,173,276 4,435,605 2,730,657 Total cash received from Trusts $ 8,211,950 $ 6,079,025 $ 21,486,755 $ 14,994,333 (a) Includes additional advances on existing securitizations. (b) These amounts are not reflected in the accompanying condensed consolidated statements of cash flows because these cash flows are intra-company and eliminated in consolidation. Off-balance sheet variable interest entities During the nine months ended September 30, 2021 and 2020, the Compa ny sold $1,891,278 and $1,148,587 respectively, of gross retail installment contracts to third party investors in off-balance sheet securitizations for a gain of $7,233 and a loss of $40,553, respectively. Gains and losses are recorded in investment gains, net, in the accompanying condensed consolidated statements of income. As of September 30, 2021 and December 31, 2020 , the Company was servicing $2,754,314 and $2,226,786, respe ctively, of gross retail installment contracts that have been sold in off-balance sheet securitizations and were subject to an optional clean-up call. The portfolio was comprised as follows: September 30, 2021 December 31, 2020 Related party SPAIN serviced securitizations $ 687,158 $ 1,214,644 Third party SCART serviced securitizations 2,067,156 929,429 Third party CCAP serviced securitizations — 82,713 Total serviced for others portfolio $ 2,754,314 $ 2,226,786 Other than repurchases of sold assets due to standard representations and warranties, the Company h as no exp osure to loss as a result of its involvement with these VIEs. A summary of the cash flows received from off-balance sheet securitization Trusts for the three and nine months ended September 30, 2021 and 2020, is as follows: Three Months Ended Nine Months Ended September 30, 2021 September 30, 2020 September 30, 2021 September 30, 2020 Receivables securitized (a) $ — $ 636,301 $ 1,891,278 $ 1,148,587 Net proceeds from new securitizations — 592,455 1,779,532 1,052,541 Cash received for servicing fees 8,041 6,598 24,061 17,856 Total cash received from securitization trusts 8,041 599,053 $ 1,803,593 $ 1,070,397 (a) Represents the unpaid principal balance at the time of original securitization.

Debt

Debt	9 Months Ended
Debt	Sep. 30, 2021
Debt Disclosure [Abstract]
Debt	Debt Total borrowings and other debt obligations as of September 30, 2021 and December 31, 2020 consists of: September 30, 2021 December 31, 2020 Notes Payable — Facilities with Third Parties $ — $ 4,159,955 Notes Payable — Secured Structured Financings 28,831,858 26,177,401 Notes Payable — Facilities with Santander and Related Subsidiaries (a) 9,600,000 10,801,318 $ 38,431,858 $ 41,138,674 Notes Payable - Credit Facilities The following table presents information regarding the Company’s credit facilities as of September 30, 2021 and December 31, 2020: September 30, 2021 Maturity Date(s) Utilized Balance Committed Amount Effective Rate Assets Pledged Restricted Cash Pledged Facilities with third parties: Warehouse line June 2023 $ — $ 500,000 —% $ 367,404 $ — Warehouse line March 2023 — 1,250,000 —% 246,480 1 Warehouse line October 2022 — 1,500,000 —% 121,046 — Warehouse line October 2022 — 3,500,000 —% 133,429 — Warehouse line October 2022 — 500,000 —% 13,409 500 Warehouse line October 2022 — 2,100,000 —% 175,624 64 Warehouse line January 2023 — 1,000,000 —% 477,840 — Warehouse line November 2022 — 500,000 —% 279,703 — Warehouse line July 2022 — 900,000 —% — — Total facilities with third parties — 11,750,000 1,814,935 565 Facilities with Santander and related subsidiaries: Promissory Note December 2021 250,000 250,000 3.58% — — Promissory Note December 2022 250,000 250,000 3.82% — — Promissory Note December 2023 250,000 250,000 5.07% — — Promissory Note December 2022 250,000 250,000 4.83% — — Promissory Note May 2023 350,000 350,000 3.67% — — Promissory Note November 2022 400,000 400,000 2.90% — — Promissory Note April 2023 450,000 450,000 5.92% — — Promissory Note June 2022 500,000 500,000 3.19% — — Promissory Note July 2024 500,000 500,000 3.77% — — Promissory Note March 2022 650,000 650,000 4.06% — — Promissory Note September 2023 750,000 750,000 3.17% — — Promissory Note May 2025 1,000,000 1,000,000 3.86% — — Promissory Note June 2022 2,000,000 2,000,000 2.03% — — Promissory Note September 2022 2,000,000 2,000,000 1.01% — — Line of credit July 2024 — 500,000 2.08% — — Line of credit March 2023 — 2,500,000 3.28% — — Total facilities with Santander and related subsidiaries 9,600,000 12,600,000 — — Total revolving credit facilities $ 9,600,000 $ 24,350,000 $ 1,814,935 $ 565 (a) In 2017, the Company entered into an interest rate swap to hedge the interest rate risk on this fixed rate debt. This derivative was designated as fair value hedge at inception. This derivative was later terminated and the unamortized fair value hedge adjustment as of September 30, 2021 and December 31, 2020 was zero and $1.3 million, respectively, the amortization of which reduced interest expense over the life of the fixed rate debt. December 31, 2020 Maturity Date(s) Utilized Balance Committed Amount Effective Rate Assets Pledged Restricted Cash Pledged Facilities with third parties: Warehouse line August 2022 $ — $ 500,000 1.50% $ 159,348 $ — Warehouse line March 2022 942,845 1,250,000 1.34% 1,621,206 1 Warehouse line October 2022 1,000,600 1,500,000 1.85% 639,875 — Warehouse line October 2022 441,143 3,500,000 3.45% 2,057,758 — Warehouse line October 2022 168,300 500,000 3.07% 243,649 1,201 Warehouse line October 2022 845,800 2,100,000 3.29% 1,156,885 — Warehouse line January 2022 415,700 1,000,000 1.81% 595,518 — Warehouse line November 2022 177,600 500,000 1.18% 371,959 — Warehouse line July 2022 — 900,000 1.46% — 1,684 Repurchase facility January 2021 167,967 167,967 1.64% 217,200 — Total facilities with third parties 4,159,955 11,917,967 7,063,398 2,886 Facilities with Santander and related subsidiaries: Promissory Note December 2021 250,000 250,000 3.70% — — Promissory Note December 2022 250,000 250,000 3.95% — — Promissory Note December 2023 250,000 250,000 5.25% — — Promissory Note December 2022 250,000 250,000 5.00% — — Promissory Note May 2021 250,000 250,000 2.25% — — Promissory Note March 2021 300,000 300,000 3.95% — — Promissory Note May 2023 350,000 350,000 3.80% — — Promissory Note November 2022 400,000 400,000 3.00% — — Promissory Note April 2023 450,000 450,000 6.13% — — Promissory Note June 2022 500,000 500,000 3.30% — — Promissory Note July 2024 500,000 500,000 3.90% — — Promissory Note March 2022 650,000 650,000 4.20% — — Promissory Note August 2021 650,000 650,000 3.44% — — Promissory Note September 2023 750,000 750,000 3.27% — — Promissory Note May 2025 1,000,000 1,000,000 3.99% — — Promissory Note June 2022 2,000,000 2,000,000 1.40% — — Promissory Note September 2022 2,000,000 2,000,000 1.04% — — Line of credit July 2021 — 500,000 2.08% — — Line of credit March 2022 — 2,500,000 3.28% — — Total facilities with Santander and related subsidiaries 10,800,000 13,800,000 — — Total revolving credit facilities 14,959,955 25,717,967 7,063,398 2,886 Notes Payable - Facilities with Third Parties The warehouse lines and repurchase facilities are fully collateralized by a designated portion of the Company’s retail installment contracts (Note 2), leased vehicles (Note 4), securitization notes payables and residuals retained by the Company. Facilities with Santander and Related Subsidiaries Lines of Credit SHUSA provides the Compa ny with $500,000 of committed revolving credit and $2,500,000 of contin gent liquidity that can be drawn on an unsecured basis. Promissory Notes SHUSA provides the Company wi th $5,600,000 of unsecured promissory notes. Santander provides the Company with $4,000,000 o f unsecured promissory notes. Notes Payable - Secured Structured Financings The following table presents information regarding secured structured financings as of September 30, 2021 and December 31, 2020: September 30, 2021 Estimated Maturity Date(s) at Issuance Balance Initial Note Amounts Issued (d) Initial Weighted Average Interest Rate Collateral (b) Restricted Cash 2017 Securitizations July 2022 - September 2024 118,293 3,889,470 1.35% - 2.52% 564,070 90,895 2018 Securitizations February 2024 - April 2026 1,606,743 11,000,280 2.41% - 3.42% 2,510,723 264,577 2019 Securitizations May 2024 - February 2027 4,249,645 11,924,720 2.08% - 3.34% 5,788,406 466,789 2020 Securitizations November 2024 - May 2028 5,629,703 10,028,425 0.60% - 2.73% 7,256,352 364,410 2021 Securitizations November 2025 - March 2029 13,052,747 14,986,600 0.48% - 0.65% 15,283,626 479,199 Public Securitizations (a) 24,657,131 51,829,495 31,403,177 1,665,870 2013 Private issuances July 2024 - September 2024 230,404 1,537,025 1.28% 1,015,024 751 2018 Private issuances June 2022 - April 2024 1,452,711 2,200,002 2.42% - 3.17% 2,111,645 — 2019 Private issuance September 2022 - November 2026 1,517,437 3,524,536 2.45% - 3.90% 2,300,073 10,566 2020 Private issuance April 2024 - December 2027 974,175 1,500,000 1.29% - 2.68% 1,330,694 4,902 Privately issued amortizing notes (c) 4,174,727 8,761,563 6,757,436 16,219 Total secured structured financings $ 28,831,858 $ 60,591,058 $ 38,160,613 $ 1,682,089 (a) Securitizations executed under Rule 144A of the Securities Act are included within this balance. (b) Secured structured financings may be collateralized by the Company’s collateral overages of other issuances. (c) All privately issued amortizing notes issued in 2014 through 2017 were paid in full. (d) Excludes securitizations that no longer have outstanding debt and excludes any incremental borrowings. December 31, 2020 Estimated Maturity Date(s) at Issuance Balance Initial Note Amounts Issued Initial Weighted Average Interest Rate Collateral Restricted Cash 2016 Securitizations August 2022 - March 2024 $ 259,078 $ 2,519,810 1.63% - 2.34% $ 354,985 $ 85,041 2017 Securitizations July 2022 - September 2024 1,049,867 8,262,940 1.35% - 2.52% 1,661,845 211,606 2018 Securitizations May 2022 - April 2026 2,723,099 12,039,840 2.41% - 3.42% 4,130,936 376,246 2019 Securitizations May 2024 - February 2027 6,653,226 11,924,720 2.08% - 3.34% 8,582,241 488,546 2020 Securitizations November 2024 - May 2028 8,256,890 10,028,425 0.60% - 2.73% 10,292,570 548,912 Public Securitizations 18,942,160 44,775,735 25,022,577 1,710,351 2013 Private issuances July 2024 - September 2024 777,210 1,537,025 1.28% 1,843,443 751 2018 Private issuances June 2022 - April 2024 2,768,145 4,186,002 2.42%- 3.53% 4,223,567 7,675 2019 Private issuance September 2022 - November 2026 2,584,974 3,524,536 2.45% - 3.90% 3,632,833 10,457 2020 Private issuance April 2024 - December 2027 1,104,912 1,500,000 1.29% - 2.68% 1,532,280 4,902 Privately issued amortizing notes 7,235,241 10,747,563 11,232,123 23,785 Total secured structured financings $ 26,177,401 $ 55,523,298 $ 36,254,700 $ 1,734,136 Most of the Company’s secured structured financings are in the form of public, SEC-registered securitizations. The Company also executes private securitizations under Rule 144A of the Securities Act and periodically issues private term amortizing notes, which are structured similarly to securitizations but are acquired by banks and conduits. The Company’s securitiz ations and private issuances are collateralized by vehicle retail installment contracts and loans or leases. As of September 30, 2021 and December 31, 2020 , the Company had private issuances of notes backed by vehicle leases totali ng $6.6 billion and $8.7 billion, respectively. Unamortized debt issuance costs are amortized as interest expense over the terms of the related notes payable using the effective interest method and are classified as a discount to the related recorded debt balance. Amortization of debt issuance costs were $13,213 and $10,265 for the three months ended September 30, 2021 and 2020, respectively, and $37,100 and $28,301 for the nine months ended September 30, 2021 and 2020, respectively. For securitizations, the term takes into consideration the expected execution of the contractual call option, if applicable. Amortization of premium or accretion of discount on notes payable is also included in interest expense using the effective interest method over the estimated remaining life of the notes. Total interest expense on secured structured financings for the three months ended September 30, 2021 and 2020 was $103,511 and $150,734, respectively, and for the nine months ended September 30, 2021 and 2020 was $342,168 and $522,266, respec tively.

Shareholders' Equity

Shareholders' Equity	9 Months Ended
Shareholders' Equity	Sep. 30, 2021
Equity [Abstract]
Shareholders' Equity	Shareholders’ Equity In August, the Company and SHUSA entered into a definitive agreement whereby SHUSA will acquire the remaining shares of the Company for $41.50 per share in cash, which represents a total equity value of $12.7 billion. Please refer to Note 1 - “ Description of Business, Basis of Presentation, and Accounting Policies ” to these Condensed Consolidated Financial Statements for additional information related to the agreement. Share Repurchases In June 2019, the Company announced that the Board had authorized purchases by the Company of up to $1.1 billion , excluding commissions, of its outstanding common stock effective from the third quarter of 2019 through the end of the second quarter of 2020. During the three months ended March 31, 2020, the Company purchased shares of its common stock through a modified Dutch Auction Tender Offer, and extended the share repurchase program through the end of the third quarter of 2020. On July 31, 2020, the Company announced that SHUSA’s request for certain exceptions to the Federal Reserve Board’s interim policy (the “Interim Policy”), prohibiting share repurchases (other than repurchases relating to issuances of common stock under employee stock ownership plans) and limiting dividends paid by certain CCAR institutions to the average trailing four quarters of net income, had been approved. Such exception approval permitted the Company to continue its share repurchase program through the end of the third quarter of 2020. On August 10, 2020, the Company announced that it had substantially exhausted the amount of shares the Company was permitted to repurchase under the exception approval and that the Company expected to repurchase an immaterial number of shares remaining under the exception approval. After substantially exhausting its share repurchase authorization on August 10, 2020, and through the end of the second quarter of 2021, the Company was only permitted to repurchase shares of the Company’s common stock equal to the amount of share issuances related to the Company’s expensed employee compensation. The Company does not presently have permission to repurchase any shares of the Company’s common stock. Please find below the details of the Company's tender offer and other share repurchase programs for the three and nine months ended September 30, 2021 and 2020 : Three Months Ended Nine Months Ended September 30, 2021 September 30, 2020 September 30, 2021 September 30, 2020 Tender offer (a): Number of shares purchased — — — 17,514,707 Average price per share $ — $ — $ — $ 26.00 Cost of shares purchased (b) $ — $ — $ — $ 455,382 Other share repurchases: Number of shares purchased — 10,198,800 357,747 15,956,561 Average price per share $ — $ 21.91 $ 26.46 $ 20.00 Cost of shares purchased (b) $ — $ 223,485 $ 9,468 $ 319,075 Total number of shares purchased — 10,198,800 357,747 33,471,268 Average price per share $ — $ 21.91 $ 26.46 $ 23.14 Total cost of shares purchased (b) $ — $ 223,485 $ 9,468 $ 774,457 (a) During the three months ended March 31, 2020, the Company purchased shares of its common stock through a modified Dutch Auction Tender Offer. (b) Cost of shares exclude commissions Treasury Stock had 57,425,382 and 57,067,635 shares of treasury stock outstanding, with a co st of $1,311,339 and $1,301,864 as of September 30, 2021 and December 31, 2020, respectively. No shares were withheld to cover income taxes related to stock issued in connection with employee incentive compensation plans for the nine months ended September 30, 2021. The value of the treasury stock is included within the add itional paid-in-capital. Accumulated Other Comprehensive Income (Loss) A summary of changes in accumulated other comprehensive income (loss), net of tax, for the three and nine months ended September 30, 2021 and 2020 is as follows: Three Months Ended Nine Months Ended September 30, 2021 September 30, 2020 September 30, 2021 September 30, 2020 Beginning balance, unrealized gains (losses) $ (36,855) $ (63,705) $ (50,566) $ (26,693) Other comprehensive income (loss) before reclassifications (gross) 414 94 2,603 (43,212) Amounts (gross) reclassified out of accumulated other comprehensive income (loss) 5,247 6,729 16,769 13,023 Ending balance, unrealized gains (losses) $ (31,194) $ (56,882) $ (31,194) $ (56,882) Amounts (gross) reclassified out of accumulated other comprehensive income (loss) during the three and nine months ended September 30, 2021 and 2020 consist of the following: Three Months Ended Nine Months Ended Income statement line item Reclassification September 30, 2021 September 30, 2020 September 30, 2021 September 30, 2020 Cash flow hedges $ 6,946 $ 8,939 $ 22,254 $ 17,260 Interest expense Tax benefit (1,699) (2,210) (5,485) (4,237) Net of tax $ 5,247 $ 6,729 $ 16,769 $ 13,023 Dividends

Derivative Financial Instrument

Derivative Financial Instruments	9 Months Ended
Derivative Financial Instruments	Sep. 30, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Derivative Financial Instruments The Company uses derivative financial instruments such as interest rate swaps, interest rate caps and the corresponding options written in order to manage the Company’s exposure to changing interest rates. The Company uses both derivatives that qualify for hedge accounting treatment and economic hedges. The underlying notional amounts of these derivative financial instruments at September 30, 2021 and December 31, 2020, are as follows: September 30, 2021 December 31, 2020 Notional Asset Liability Notional Asset Liability Interest rate swap agreements designated as cash flow hedges $ — $ — $ — $ 2,450,000 $ 123 $ (70,589) Interest rate swap agreements not designated as hedges 250,000 — (8,085) 250,000 — (12,934) Interest rate cap agreements 7,649,971 13,314 — 10,199,134 4,617 — Options for interest rate cap agreements 7,649,971 — (13,314) 10,199,134 — (4,617) The aggregate fair value of the interest rate swap agreements is included on the Company’s consolidated balance sheets in other assets and other liabilities, as appropriate. The aggregate fair value of interest rate cap agreements are included in other assets and the related options in other liabilities on the Company’s consolidated balance sheets. See Note 10 - “ Fair Value of Financial Instruments ” to these Condensed Consolidated Financial Statements for additional disclosure of fair value and balance sheet location of the Company’s derivative financial instruments. The Company enters into legally enforceable master netting agreements that reduce risk by permitting netting of transactions, such as derivatives and collateral posting, with the same counterparty on the occurrence of certain events. A master netting agreement allows two counterparties the ability to net-settle amounts under all contracts, including any related collateral posted, through a single payment. The right to offset and certain terms regarding the collateral process, such as valuation, credit events and settlement, are contained in ISDA master agreements. The Company has elected to present derivative balances on a gross basis even if the derivative is subject to a legally enforceable master netting (ISDA) agreement. Collateral that is received or pledged for these transactions is disclosed within the “Gross Amounts Not Offset in the Consolidated Balance Sheet” section of the tables below. Information on the offsetting of derivative assets and derivative liabilities due to the right of offset was as follows, as of September 30, 2021 and December 31, 2020: Gross Amounts Not Offset in the Assets Presented in the Collateral Net September 30, 2021 Interest rate caps - Santander and affiliates $ 2,334 $ (2,334) $ — Interest rate caps - third party 10,980 (10,980) — Total derivatives subject to a master netting arrangement or similar arrangement 13,314 (13,314) — Total derivatives not subject to a master netting arrangement or similar arrangement — — — Total derivative assets $ 13,314 $ (13,314) $ — Total financial assets $ 13,314 $ (13,314) $ — December 31, 2020 Interest rate swaps - third party (b) $ 123 $ (123) $ — Interest rate caps - Santander and affiliates 463 (463) — Interest rate caps - third party 4,154 (4,154) — Total derivatives subject to a master netting arrangement or similar arrangement 4,740 (4,740) — Total derivatives not subject to a master netting arrangement or similar arrangement — — — Total derivative assets $ 4,740 $ (4,740) $ — Total financial assets $ 4,740 $ (4,740) $ — (a) Collateral received includes cash, cash equivalents, initial margin and other financial instruments. Cash collateral received is reported in Other liabilities in the consolidated balance sheet. Financial instruments that are pledged to the Company are not reflected in the accompanying balance sheet since the Company does not control or have the ability of rehypothecation of these instruments. In certain instances, the counter party is over-collateralized since the actual amount of collateral received exceeds the associated financial asset. As a result, the actual amount of collateral received that is reported may be greater than the amount shown in the table above. (b) Includes derivative instruments originally transacted with Santander and affiliates and subsequently amended to reflect clearing with central clearing counterparties. Gross Amounts Not Offset in the Liabilities Presented in the Collateral Net September 30, 2021 Interest rate swaps - third party (b) $ 8,085 $ (8,085) $ — Interest rate caps - Santander and affiliates 2,334 (2,334) — Interest rate caps - third party 10,980 (4,885) 6,095 Total derivatives subject to a master netting arrangement or similar arrangement 21,399 (15,304) 6,095 Total derivatives not subject to a master netting arrangement or similar arrangement — — — Total derivative liabilities $ 21,399 $ (15,304) $ 6,095 Total financial liabilities $ 21,399 $ (15,304) $ 6,095 December 31, 2020 Interest rate swaps - third party $ 83,523 $ (83,523) $ — Interest rate caps - Santander and affiliates 463 (463) — Interest rate caps - third party 4,154 (4,154) — Total derivatives subject to a master netting arrangement or similar arrangement 88,140 (88,140) — Total derivatives not subject to a master netting arrangement or similar arrangement — — — Total derivative liabilities $ 88,140 $ (88,140) $ — Total financial liabilities $ 88,140 $ (88,140) $ — (a) Collateral pledged includes cash, cash equivalents, initial margin and other financial instruments. These balances are reported in Other assets in the consolidated balance sheet. In certain instances, the Company is over-collateralized since the actual amount of collateral pledged exceeds the associated financial liability. As a result, the actual amount of collateral pledged that is reported in Other assets may be greater than the amount shown in the table above. (b) Includes derivative instruments originally transacted with Santander and affiliates and subsequently amended to reflect clearing with central clearing counterparties. During 2018, 2019 and 2020, the Company entered into interest rate swap agreements with an aggregate notional amount of $2.2 billion. The interest rate swaps were to be used to hedge the Company’s variable rate debt and had maturity dates ranging from two relationships and terminated the swaps resulting in a fair value adjustment of $6.5 million recorded as a reduction to interest expense. Amounts previously recorded in accumulated other comprehensive income/loss related to these interest rate swaps, totaling $50.6 million, are being reclassified into earnings over the term as the previously hedged cash flows impact earnings. For the terminated swaps, the Company reclassified $7.9 million previously recorded in accumulated other comprehensive income/loss into interest expense during the quarter ending September 30, 2021. The gross gains (losses) reclassified from accumulated other comprehensive income (loss) to net income, are included as components of interest expense. The impacts on the consolidated statements of income and comprehensive income for the three and nine months ended September 30, 2021 and 2020 were as follows: Three Months Ended September 30, 2021 Recognized in Earnings Gross Gains (Loss) Recognized in Accumulated Other Comprehensive Income (Loss) Gross amount Reclassified From Accumulated Other Comprehensive Interest rate swap agreements designated as cash flow hedges $ — $ 1,023 $ (6,946) Derivative instruments not designated as hedges: Losses (Gains) recognized in interest expenses $ 143 Three Months Ended September 30, 2020 Recognized in Earnings Gross Gains (Loss) Recognized in Accumulated Other Comprehensive Income (Loss) Gross amount Reclassified From Accumulated Other Comprehensive Interest rate swap agreements designated as cash flow hedges $ — $ 256 $ (8,939) Derivative instruments not designated as hedges: Losses (Gains) recognized in interest expenses $ 567 Nine Months Ended September 30, 2021 Recognized in Earnings Gross Gains (Loss) Recognized in Accumulated Other Comprehensive Income (Loss) Gross amount Reclassified From Accumulated Other Comprehensive Interest rate swap agreements designated as cash flow hedges $ — $ 4,687 $ (22,254) Derivative instruments not designated as hedges: Losses (Gains) recognized in interest expenses $ 113 Nine Months Ended September 30, 2020 Recognized in Earnings Gross Gains (Loss) Recognized in Accumulated Other Comprehensive Income (Loss) Gross amount Reclassified From Accumulated Other Comprehensive Interest rate swap agreements designated as cash flow hedges $ — $ (59,405) $ (17,260) Derivative instruments not designated as hedges: Losses (Gains) recognized in interest expenses $ 10,774 The Company estimates that approxima tely $24,259 of unrealized gains i ncluded in accumulated other comprehensive income (loss) will be reclassified to interest expense within the next twelve months.

Fair Value of Financial Instrum

Fair Value of Financial Instruments	9 Months Ended
Fair Value of Financial Instruments	Sep. 30, 2021
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Fair Value of Financial Instruments Fair value measurement requires that valuation techniques maximize the use of observable inputs and minimize the use of unobservable inputs and also establishes a fair value hierarchy that categorizes the inputs to valuation techniques used to measure fair value into three levels as follows: Level 1 inputs are quoted prices in active markets for identical assets or liabilities that can be accessed as of the measurement date. Active markets are those in which transactions for the asset or liability occur in sufficient frequency and volume to provide pricing information on an ongoing basis. Level 2 inputs are those other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly. These include quoted prices for similar assets or liabilities in active markets and quoted prices for identical or similar assets or liabilities in markets that are not active. Level 3 inputs are those that are unobservable or not readily observable for the asset or liability and are used to measure fair value to the extent relevant observable inputs are not available. Financial Instruments Measured At Fair Value on a Recurring Basis The fo llowing tables present the Company’s assets and liabilities that are measured at fair value on a recurring basis at September 30, 2021 and December 31, 2020, and the level within the fair value hierarchy: Level 1 Level 2 Level 3 Balance at September 30, 2021 Level 1 Level 2 Level 3 Balance at December 31, 2020 Other assets: Trading interest rate caps (a) $ — $ 13,314 $ — $ 13,314 $ — $ 4,617 $ — $ 4,617 Cash flow hedging interest rate swaps (a) — — — $ — — 123 — $ 123 Available-for-sale-debt securities (b) — 90,688 — $ 90,688 — 95,654 — $ 95,654 Retail installment contracts (c)(d) — 3,774 2,396 $ 6,170 — — 5,614 $ 5,614 Other liabilities: Trading options for interest rate caps (a) — 13,314 — $ 13,314 — 4,617 — $ 4,617 Cash flow hedging interest rate swaps (a) — — — $ — — 70,589 — $ 70,589 Trading interest rate swaps (a) — 8,085 — $ 8,085 — 12,934 — $ 12,934 (a) The valuation is determined using widely accepted valuation techniques including a DCF on the expected cash flows of each derivative. This analysis reflects the contractual terms of the derivative, including the period to maturity, and uses observable market-based inputs. The Company incorporates credit valuation adjustments to appropriately reflect both its own nonperformance risk and the respective counterparty’s nonperformance risk in the fair value measurement of its derivatives. In adjusting the fair value of its derivative contracts for the effect of nonperformance risk, the Company has considered the impact of netting and any applicable credit enhancements, such as collateral postings and guarantees. The Company utilizes the exception in ASC 820-10-35-18D (commonly referred to as the “portfolio exception”) with respect to measuring counterparty credit risk for instruments (Note 9). (b) The Company's AFS debt securities includes U.S. Treasury securities that are valued utilizing observable market quotes. The Company obtains vendor trading platform data (actual prices) from a number of live data sources, including active market makers and interdealer brokers and its securities are therefore, classified as Level 2. (c) The fair values of the retail installment contracts are estimated using a DCF model and are classified as Level 3. As of September 30, 2021, the Company had used the most recent purchase price as the fair value for certain loans and hence classified those retail installment contracts as Level 2. Changes in the fair value are recorded in investment gains (losses), net in the consolidated statement of income. (d) The aggregate fair value of retail installment contracts in non-accrual status, as of September 30, 2021 and December 31, 2020, is $541 a nd $1,129, respectively. Level 3 Rollforward for Assets and Liabilities Measured at Fair Value on a Recurring Basis The following table presents the changes in retail installment contracts held for investment balances classified as Level 3 balances for the three and nine months ended September 30, 2021 and 2020: Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 Balance — beginning of year $ 2,841 $ 10,585 $ 5,614 $ 4,719 Additions / issuances 1,171 — 1,171 2,512 Transfer from level 2 (a) — — — 17,634 Net collection activities (1,616) (2,410) (4,389) (16,854) Gains recognized in earnings — 73 — 237 Balance — end of year $ 2,396 $ 8,248 $ 2,396 $ 8,248 (a) The Company transferred retail installment contracts from Level 2 to Level 3 during the three months ended March 31, 2020 because the fair value for these assets could not be determined by using readily observable inputs at March 31, 2020. There we re no other material transfers in or out of Level 3 during the three months ended September 30, 2020 and during the three and nine months ended September 30, 2021. Financial Instruments Measured At Fair Value on a Nonrecurring Basis The following table presents the Company’s assets and liabilities that are measured at fair value on a nonrecurring basis at September 30, 2021 and December 31, 2020, respectively: Nine Months Ended September 30, 2021 Year Ended December 31, 2020 Total Lower of cost or fair value expense Total Lower of cost or fair value expense Other assets — vehicles (a) $ 269,627 $ — $ 311,557 $ — Personal loans held for sale (b) — — 893,479 355,136 Retail installment contracts held for sale (c) 359,561 — 674,048 $ 7,385 Auto loans impaired due to bankruptcy (d) 204,594 — 191,785 — ( a) The Company estimates the fair value of its vehicles, which are obtained either through repossession or lease termination, using historical auction rates and current market levels of used car prices. (b) The estimated fair value for personal loans held for sale is calculated based on the lower of market participant view and a DCF analysis in which the Company uses significant unobservable inputs on key assumptions. The lower of cost or fair value adjustment for personal loans held for sale includes customer default activity and adjustments related to the net change in the portfolio balance during the reporting period. On March 31, 2021, the Company sold the personal lending portfolio. Refer to Note 1 – “Description of Business, Basis of Presentation, and Accounting Principles” to these Condensed Consolidated Financial Statements for more information. (c) The estimated fair value is calculated based on a DCF analysis in which the Company uses significant unobservable inputs on key assumptions, including expected default rates, prepayment rates, recovery rates, and discount rates reflective of the cost of funds and appropriate rate of returns. (d) For loans that are considered collateral-dependent, such as certain bankruptcy loans, impairment is measured based on the fair value of the collateral, less its estimated cost to sell. For the underlying collateral, the estimated fair value is obtained using historical auction rates and current market levels of used car prices. No additional lower of cost or fair value expense was recorded for the nine months ended September 30, 2021. Quantitative Information about Level 3 Fair Value Measurements The following table presents quantitative information about the significant unobservable inputs for assets and liabilities measured at fair value on a recurring and nonrecurring basis at September 30, 2021 and December 31, 2020, respective ly: Financial Instruments Fair Value at September 30, 2021 Valuation Technique Unobservable Inputs Range (weighted average) (a) Financial Assets: Retail installment contracts held for investment $ 2,396 Discounted Cash Flow Discount Rate 7%-13% (9%) Default Rate 4%-10% (7%) Prepayment Rate 4%-15% (15%) Loss Severity Rate 50%-60% (56%) Retail installment contracts held for sale $ 359,561 Discounted Cash Flow Discount Rate 1% - 2% (2%) Default Rate 4% - 10% (7%) Prepayment Rate 15% - 20% (17%) Loss Severity Rate 50% - 55% (52%) (a) Weighted average was developed by weighting the associated relative unpaid principal balances. Financial Instruments Fair Value at December 31, 2020 Valuation Technique Unobservable Inputs Range Financial Assets: Retail installment contracts held for investment $ 5,614 Discounted Cash Flow Discount Rate 7%-11% Default Rate 4%-20% Prepayment Rate 15%-25% Loss Severity Rate 50%-60% Personal loans held for sale $ 893,479 Lower of Market or Income Approach Market Approach Market Participant View 60%-70% Income Approach Discount Rate 20%-30% Default Rate 35%-45% Net Principal & Interest Payment Rate 65%-75% Loss Severity Rate 90%-95% Retail installment contracts held for sale $ 674,048 Discounted Cash Flow Discount Rate 1.5% - 2.5% Default Rate 2% - 4% Prepayment Rate 10% - 20% Loss Severity Rate 50% - 60% Financial Instruments Disclosed, But Not Carried, At Fair Value The following tables present the carrying value and estimated fair value of the Company’s financial assets and liabilities disclosed, but not carried, at fair value at September 30, 2021 and December 31, 2020, and the level within the fair value hierarchy: September 30, 2021 December 31, 2020 Carrying Estimated Level 1 Level 2 Level 3 Carrying Estimated Level 1 Level 2 Level 3 Assets: Cash and cash equivalents (a) $ 2,106,405 $ 2,106,405 $ 2,106,405 $ — $ — $ 109,053 $ 109,053 $ 109,053 $ — $ — Finance receivables held for investment, net (b) 27,272,976 29,878,212 — 47,691 29,830,521 26,806,606 29,464,066 — — 29,464,066 Restricted cash (a) 2,248,667 2,248,667 2,248,667 — — 2,221,094 2,221,094 2,221,094 — — Investments in debt securities held to maturity (c) 101,815 102,449 — 102,449 — 44,841 45,606 — 45,606 — Total $ 31,729,863 $ 34,335,733 $ 4,355,072 $ 150,140 $ 29,830,521 $ 29,181,594 $ 31,839,819 $ 2,330,147 $ 45,606 $ 29,464,066 Liabilities: Notes Payable: Facilities with third parties (d) $ — $ — $ — $ — $ — $ 4,159,955 $ 4,159,955 $ — $ — $ 4,159,955 Secured structured financings (e) 28,831,858 29,089,183 — 24,644,581 4,444,602 26,177,401 26,673,970 — 18,291,898 8,382,072 Facilities with Santander and related subsidiaries (f) 9,600,000 9,798,720 — — 9,798,720 10,801,318 11,333,823 — — 11,333,823 Total $ 38,431,858 $ 38,887,903 $ — $ 24,644,581 $ 14,243,322 $ 41,138,674 $ 42,167,748 $ — $ 18,291,898 $ 23,875,850 (a) Cash and cash equivalents and restricted cash — The carrying amount of cash and cash equivalents, including restricted cash, is at an approximated fair value as the instruments mature within 90 days or less and bear interest at market rates. (b) Finance receivables held for investment, net — Finance receivables held for investment, net are carried at amortized cost, net of an allowance. These receivables exclude retail installment contracts that are measured at fair value on a recurring and nonrecurring basis. The estimated fair value for the underlying financial instruments is determined as follows: • Retail installment contracts held for investment and purchased receivables - credit deteriorated — The estimated fair value for certain finance receivables at September 30, 2021 is based on the most recent purchase price and hence has classified these amounts as Level 2. The estimated fair value of these remaining finance receivables at September 30, 2021 is estimated using a DCF model, and such receivables are classified as Level 3. • Finance lease receivables — Finance lease receivables are carried at gross investments, net of unearned income and allowance for lease losses. Management believes that the terms of these credit agreements approximate market terms for similar credit agreements. (c) Investments in debt securities held to maturity - Investments in debt securities held to maturity are recorded at amortized cost and are priced by third-party pricing vendors. The third-party vendors use a variety of methods when pricing these securities that incorporate relevant observable market data to arrive at an estimate of what a buyer in the marketplace would pay for a security under current market conditions. These investment securities are, therefore, considered Level 2. (d) Notes payable — facilities with third parties — The carrying amount of notes payable related to revolving credit facilities is estimated to approximate fair value. Management believes that the terms of these credit agreements approximate market terms for similar credit agreements as the facilities are subject to short-term floating interest rates that approximate rates available to the Company. (e) Notes payable — secured structured financings — The estimated fair value of notes payable related to secured structured financings is calculated based on market observable prices and spreads for the Company’s publicly traded debt and market observed prices of similar notes issued by the Company, or recent market transactions involving similar debt with similar credit risks, which are considered Level 2 inputs. The estimated fair value of notes payable related to privately issued amortizing notes is calculated based on a combination of credit enhancement review, discounted cash flow analysis and review of market observable spreads for similar liabilities. In conducting this analysis, the Company uses significant unobservable inputs on key assumptions, which are considered Level 3 inputs. (f) Notes payable — facilities with Santander and related subsidiaries — The carrying amount of floating rate notes payable to a related party is estimated to approximate fair value as the facilities are subject to short-term floating interest rates that approximate rates available to the Company. The fair value premium/discount of the fixed rate promissory notes are derived from changes in the Company’s unsecured cost of funds since the time of issuance and weighted average life of these notes.

Investment Gains (Losses), Net

Investment Gains (Losses), Net	9 Months Ended
Investment Gains (Losses), Net	Sep. 30, 2021
Investments, Debt and Equity Securities [Abstract]
Investment Gains (Losses), Net	Investment Gains (Losses), Net When the Company sells retail installment contracts, personal loans or leases to unrelated third parties or to VIEs and determines that such sale meets the applicable criteria for sale accounting, the Company recognizes a gain or loss for the difference between the cash proceeds, retained securities, and carrying value of the assets sold. The gain or loss is recorded in investment gains (losses), net. Lower of cost or market adjustments on the amortized cost of finance receivables held for sale are also recorded in investment gains (losses), net. Investment gains (losses), net was comprised of the following for the three and nine months ended September 30, 2021 and 2020: Three Months Ended Nine Months Ended September 30, 2021 September 30, 2020 September 30, 2021 September 30, 2020 Gain (loss) on sale of loans and leases $ 2,003 $ (13,669) $ 19,412 $ (40,553) Lower of cost or market adjustments — (56,598) (31,848) (241,198) Other gains, net 3,238 1,278 5,379 1,754 $ 5,241 $ (68,989) $ (7,057) $ (279,997) The lower of cost or market adjustments for the three and nine months ended September 30, 2021 and 2020 included zero, $65,047, $81,247 and $278,144, respectively, in customer default activity, and unfavorable/(favorable) adjustments of zero, $(33,199), $24,649 and $36,946 respectively, primarily related to net changes in the unpaid principal balance on the personal lending portfolio. On March 31, 2021, the Company sold the personal lending portfolio. Refer to Note 1 - “Description of Business, Basis of Presentation, and Accounting Principles” to these Condensed Consolidated Financial Statements for more information.

Income Taxes

Income Taxes	9 Months Ended
Income Taxes	Sep. 30, 2021
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company recorded income tax expense/(benefit) of $208,607 (21.5% effective tax rate) and $172,476 (26.0% effective tax rate) during the three months ended September 30, 2021 and 2020, respectively. The Company recorded income tax expense/(benefit) of $775,484 (23.2% effective tax rate) and $137,161 (26.0% effective tax rate) during the nine months ended September 30, 2021 and 2020, respectiv e ly. The effective tax rate decreased primarily due to increased benefits from electrical vehicle credits, lower effective state tax rate, discrete state tax return to provision adjustments and an increase to pre-tax income that diluted unfavorable components of the effective tax rate and allowed for absorption of favorable discrete activity to produce an effective tax rate reduction. The Company is a party to a tax sharing agreement requiring that the unitary state tax liability among affiliates included in unitary state tax returns be allocated using the hypothetical s eparate company tax calculation method. The Company had a net receivable from affiliates under the tax sharing agreement of $642 and $11,191 at September 30, 2021 and December 31, 2020, respectively, which was included in related party taxes receivable in the condensed consolidated balance sheet. The Company provides U.S. income taxes on earnings of foreign subsidiaries unless the subsidiaries’ earnings are considered indefinitely reinvested outside of the United States. As of September 30, 2021 and December 31, 2020, the Com pany has no earnings that are c onsidered indefinitely reinvested. The Company applies an aggregate portfolio approach whereby disproportionate income tax effects from accumulated other comprehensive income are released only when an entire portfolio (i.e., all related units of account) of a particular type is liquidated, sold or extinguished. Significant judgment is required in evaluating and reserving for uncertain tax positions. Although management believes adequate reserves have been established for all uncertain tax positions, the final outcomes of these matters may differ. Management does not believe the outcome of any uncertain tax position, individually or combined, will have a material effect on the Company’s business, financial position or results of operations. The reserve for uncertain tax positions, as well as associated penalties and interest, is a component of the income tax provision.

Computation of Basic and Dilute

Computation of Basic and Diluted Earnings per Common Share	9 Months Ended
Computation of Basic and Diluted Earnings per Common Share	Sep. 30, 2021
Earnings Per Share [Abstract]
Computation of Basic and Diluted Earnings per Common Share	Computation of Basic and Diluted Earnings per Common Share Earnings per common share ("EPS") is computed by dividing net income by the weighted average number of common shares outstanding during the period The calculation of diluted EPS excludes the effect of exercise or settlement that would be anti-dilutive for employee stock option s of zero for the three and nine months ended September 30, 2021 and 52,114 for the three and nine months ended September 30, 2020. The following table represents EPS numbers for the three and nine months ended September 30, 2021 and 2020: Three Months Ended Nine Months Ended 2021 2020 2021 2020 Earnings per common share Net income (loss) $ 763,324 $ 490,115 $ 2,563,181 $ 389,450 Weighted average number of common shares outstanding (in thousands) 306,093 310,150 306,086 321,276 Earnings per common share $ 2.49 $ 1.58 $ 8.37 $ 1.21 Earnings per common share - assuming dilution Net income (loss) $ 763,324 $ 490,115 $ 2,563,181 $ 389,450 Weighted average number of common shares outstanding (in thousands) 306,093 310,150 306,086 321,276 Effect of employee stock-based awards (in thousands) 286 157 268 216 Weighted average number of common shares outstanding - assuming dilution (in thousands) 306,379 310,307 306,354 321,492 Earnings per common share - assuming dilution $ 2.49 $ 1.58 $ 8.37 $ 1.21

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
Commitments and Contingencies	Sep. 30, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies The following table summarizes liabilities recorded for commitments and contingencies as of September 30, 2021 and December 31, 2020, all of which are included in accounts payable and accrued expenses in the accompanying consolidated balance sheets: Agreement or Legal Matter Commitment or Contingency September 30, 2021 December 31, 2020 MPLFA Revenue-sharing and gain/(loss), net-sharing payments $ 70,675 $ 43,778 Agreement with Bank of America Servicer performance fee 462 1,200 Agreement with CBP Loss-sharing payments 286 181 Other Contingencies Consumer arrangements 29,070 22,155 Legal and regulatory proceedings Aggregate legal and regulatory liabilities 6,348 31,936 Total commitments and contingencies $ 106,841 $ 99,250 Following is a description of the agreements and legal matters pursuant to which the liabilities in the preceding table were recorded. MPLFA Under terms of the MPLFA, the Company must make revenue sharing payments to Stellantis and also must share with Stellantis when residual gains/(losses) on leased vehicles exceed a specified threshold. The Company had accrued $70,675 and $43,778 at September 30, 2021 and December 31, 2020, respectively, related to these obligations. The MPLFA also requires that the Company maintain at least $5.0 billion in funding available for Floorplan Loans and $4.5 billion of financing dedicated to Stellantis retail financing. In turn, Stellantis must provide designated minimum threshold percentages of its subvention business to the Company. Agreement with Bank of America Until January 2017, the Company had a flow agreement with Bank of America whereby the Company was committed to selling up to $300,000 of eligible loans to the bank each month. The Company retains servicing on all sold loans and may receive or pay a servicer performance payment based on an agreed-upon formula if performance on the sold loans is better or worse, respectively, than expected performance at time of sale. Servicer performance payments are due six years from the cut-off date of each loan sale. The Company had accrued $462 and $1,200 at September 30, 2021 and December 31, 2020, respectively, related to this obligation. Agreement with CBP Until May 2017, the Company sold loans to CBP under terms of a flow agreement and predecessor sale agreements. The Company retained servicing on the sold loans and owes CBP a loss-sharing payment capped at 0.5% of the original pool balance if losses exceed a specified threshold, established on a pool-by-pool basis. Loss-sharing payments are due the month in which net losses exceed the established threshold of each loan sale. The Company had accrued $286 and $181 at September 30, 2021 and December 31, 2020, respectively, related to the loss-sharing obligation. Other Contingencies The Company is or may be subject to potential liability under various other contingent exposures. The Company had accrued $29,070 and $22,155 at September 30, 2021 and December 31, 2020, respectively, for other miscellaneous contingencies. Legal and regulatory proceedings Periodically, the Company, including its subsidiaries, is and in the future expects to be party to, or otherwise involved in, various claims, disputes, lawsuits, investigations, regulatory matters and other legal matters and proceedings that arise in the ordinary course of business. In view of the inherent difficulty of predicting the outcome of any such claims, disputes, lawsuits, investigations, regulatory matters or legal proceedings, particularly where the claimants seek very large or indeterminate damages or where the matters present novel legal theories or involve a large number of parties, the Company generally cannot predict the eventual outcome of the pending matters, the timing of the ultimate resolution of the matters, or the eventual loss, fines or penalties related to the matter, if any. Accordingly, except as provided below, the Company is unable to reasonably estimate a range of its potential exposure, if any, to these claims, disputes, lawsuits, investigations, regulatory matters, and other legal proceedings at this time. Further, it is reasonably possible that actual outcomes or losses may differ materially from the Company’s current assessments and estimates and any adverse resolution of any of these matters against it could materially and adversely affect the Company’s business, financial position, liquidity, and results of operation. In accordance with applicable accounting guidance, the Company establishes an accrued liability for legal and, regulatory proceedings when those matters present loss contingencies that are both probable and estimable. In such cases, there may be an exposure to loss in excess of any amounts accrued. When a loss contingency is not both probable and estimable, the Company does not establish an accrued liability. As a legal or regulatory proceeding develops, the Company, in conjunction with any outside counsel handling the matter, evaluates on an ongoing basis whether the matter presents a loss contingency that is probable and estimable. If a determination is made during a given quarter that a loss contingency is probable and estimable, an accrued liability is established during such quarter with respect to such loss contingency and the Company continues to monitor the matter for further developments that could affect the amount of the accrued liability previously established. As of September 30, 2021 and December 31, 2020, the Company accrued aggregate legal and regulatory liabilities of $6 million and $32 million, respectively. Further, the Company estimates the aggregate range of reasonably possible losses for legal and regulatory proceedings, in excess of reserves established, is zero as of September 30, 2021. Set forth below are descriptions of the material lawsuits, regulatory matters and other legal proceedings to which the Company is subject. Shareholder Derivative Lawsuit • Seattle City Employees’ Retirement System v. Santander Holdings USA, Inc., et al.: In November 2020, a shareholder derivative complaint was filed in the Court of Chancery of the State of Delaware, captioned Seattle City v. Santander Holdings USA, Inc., C.A. No. 2020-0977-AGB . The plaintiff seeks unspecified monetary damages and other injunctive relief in the complaint. The complaint alleges, among other things, that SHUSA and the current directors breached their fiduciary duties by causing the Company to engage in share repurchases for the purpose of increasing SHUSA’s ownership of the Company above 80%, which the complaint alleges would allow SHUSA to obtain tax and other benefits not available to the rest of the Company’s shareholders. The defendants filed an answer to the complaint. • Caldwell v. Santander Consumer USA Holdings Inc.: In September 2021, a purported shareholder of the Company’s common stock filed a complaint against the Company and its Board of Directors in the United States District Court for the Southern District of New York, captioned Craig Caldwell v. Santander Consumer USA Holdings Inc. 1:21-cv-07842, alleging violations of Sections 14 and 20 of the Exchange Act based on the assertion that the Board allegedly authorized the filing of a materially incomplete and misleading Solicitation/Recommendation Statement with the SEC in connection with SHUSA’s proposed purchase of the remaining outstanding common stock of the Company that SHUSA did not already own. The plaintiff seeks to enjoin the defendants from proceeding with the proposed transaction. The complaint has not been served on any of the defendants. Consumer Lending Cases The Company is also party to various lawsuits pending in federal and state courts alleging violations of state and federal consumer lending laws, including, without limitation, the Equal Credit Opportunity Act, the Fair Debt Collection Practices Act, Fair Credit Reporting Act, Section 5 of the Federal Trade Commission Act, the Telephone Consumer Protection Act, the Truth in Lending Act, wrongful repossession laws, usury laws and laws related to unfair and deceptive acts or practices. In general, these cases seek damages and equitable and/or other relief. Regulatory Investigations and Proceedings The Company is party to, or is periodically otherwise involved in, reviews, investigations, examinations and proceedings (both formal and informal), and information-gathering requests, by government and self-regulatory agencies, including the FRBB, the CFPB, the DOJ, the SEC, the FTC and various state regulatory and enforcement agencies. Currently, such matters include, but are not limited to, the following: • Mississippi Attorney General Lawsuit: In January 2017, the Attorney General of Mississippi filed a lawsuit against the Company in the Chancery Court of the First Judicial District of Hinds County, Mississippi, captioned State of Mississippi ex rel. Jim Hood, Attorney General of the State of Mississippi v. Santander Consumer USA Inc., C.A. # G-2017-28. In July 2021, the Company and the state of Mississippi entered into a settlement agreement resolving this matter for a monetary payment of $3,700 to the state of Mississippi. Agreements • Bluestem The Company is party to agreements with Bluestem whereby the Company is committed to purchase certain new advances on personal revolving financings receivables, along with existing balances on account with new advances originated by Bluestem through April 2022. During the first quarter of 2021, the Company completed the sale of the Bluestem personal lending portfolio to a third party. In addition, the Company executed a forward flow sale agreement with a third party to purchase all personal lending receivables that the Company purchases from Bluestem through the term of the agreement with Bluestem. As of December 31, 2020, the total unused credit available to customers was $2.7 billion. In 2021, the Company purchased $0.3 billion of receivables, out of the $2.7 billion unused credit available to customers as of December 31, 2020. In 2020, the Company purchased $1.2 billion of receivables, out of the $3.0 billion unused credit available to customers as of December 31, 2019. In addition, the Company purchased $24,865 and $151,163 of receivables related to newly opened customer accounts during the nine months ended September 30, 2021 and 2020, respectively. Each customer account generated under the agreements, generally, is approved with a credit limit higher than the amount of the initial purchase, with each subsequent purchase automatically approved as long as it does not cause the account to exceed its limit and the customer is in good standing. • Others Under terms of an application transfer agreement with Nissan, the Company has the first opportunity to review for its own portfolio any credit applications turned down by the Nissan’s captive finance company. The agreement does not require the Company to originate any loans, but for each loan originated by the Company, it will pay Nissan a referral fee . In connection with the sale of retail installment contracts through securitizations and other sales, the Company has made standard representations and warranties customary to the consumer finance industry. Violations of these representations and warranties may require the Company to repurchase loans previously sold to on- or off-balance sheet Trusts or other third parties. As of September 30, 2021, there were no loans that were the subject of a demand to repurchase or replace for breach of representations and warranties for the Company’s asset-backed securities or other sales. In the opinion of management, the potential exposure of other recourse obligations related to the Company’s retail installment contract sales agreements is not expected to have a material adverse effect on the Company’s business, financial position, results of operations, or cash flows. Santander has provided guarantees on the covenants, agreements, and obligations of the Company under the governing documents of its warehouse lines and privately issued amortizing notes. These guarantees are limited to the obligations of the Company as servicer. In November 2015, the Company executed a forward flow asset sale agreement with a third party under terms of which the Company committed to sell $350,000 in charged off loan receivables in bankruptcy status on a quarterly basis. However, any sale more than $275,000 is subject to a market price check. The remaining aggregate commitment as of September 30, 2021 and December 31, 2020, not subject to market price check was $6,215 and $15,318, respectively. These matters are ongoing and could in the future result in the imposition of damages, fines or other penalties. No assurance can be given that the ultimate outcome of these matters or any resulting proceedings would not materially and adversely affect the Company’s business, financial condition and results of operations.

Related-Party Transactions

Related-Party Transactions	9 Months Ended
Related-Party Transactions	Sep. 30, 2021
Related Party Transactions [Abstract]
Related-Party Transactions	Related-Party Transactions Related-party transactions not otherwise disclosed in these footnotes to the condensed consolidated financial statements include the following: Credit Facilities Interest expense, including unused fees, for lines of credit from SHUSA (Note 7) totaled $68,320 and $79,854 for the three months ended September 30, 2021 and 2020, respectively, and $214,550 and $213,224 for the nine months ended September 30, 2021 and 2020, respectively. Accrued interest for lines of credit from SHUSA at September 30, 2021 and December 31, 2020 was $34,114 and $40,234, respectively. Interest expense, including unused fees, for lines of credit from Santander (Note 7) totaled $11,587 and $7,997 for the three months ended September 30, 2021 and 2020, respectively, and $35,266 and $8,700 for the nine months ended September 30, 2021 and 2020, respectively. Accrued interest for lines of credit from Santander at September 30, 2021 and December 31, 2020 was $1,472 and $1,603, respectively. Derivatives The Company has derivative financial instruments with Santander and affiliates with outstanding notional amounts of $3,255,024 and $3,148,850 as of September 30, 2021 and December 31, 2020, respectively (Note 9). The Company had a collateral overage on derivative liabilities with Santander and affiliates of $495 and $907 as of September 30, 2021 and December 31, 2020, respectively. Retail Installment Contracts and RV Marine The Company also has agreements with SBNA to service auto retail installment contracts and recreational and marine vehicle portfolios. Servicing fee income recognized under these agreements totaled $317 and $472 for the three months ended September 30, 2021 and 2020, respectively, and $1,070 and $1,566 for the nine months ended September 30, 2021 and 2020, respectively. Other information on the serviced auto loan and retail installment contract portfolios for SBNA as of September 30, 2021 and December 31, 2020 is as follows: September 30, 2021 December 31, 2020 Total serviced portfolio $ 135,532 $ 190,504 Cash collections due to owner 24,395 19,650 Servicing fees receivable 4,194 1,769 Dealer Lending Under the Company’s agreement with SBNA, the Company is required to permit SBNA a first right to review and assess CCAP dealer lending opportunities, and SBNA is required to pay the Company an origination fee for each loan originated under the agreement. The agreement also transferred the servicing of all CCAP receivables from dealers, including receivables held by SBNA to the Company, from the Company to SBNA. The Company may provide advance funding for dealer loans originated by SBNA, which is reimbursed to the Company by SBNA. The Company had no outstanding receivable from SBNA as of September 30, 2021 or December 31, 2020 for such advances. Other information related to the above transactions with SBNA is as follows: Three Months Ended Nine Months Ended September 30, 2021 September 30, 2020 September 30, 2021 September 30, 2020 Origination and renewal fee income from SBNA $ — $ 451 $ — $ 2,473 Servicing fees expenses charged by SBNA 33 (9) 193 63 Under the agreement with SBNA, the Company may originate retail consumer loans in connection with sales of vehicles that are collateral held against floorplan loans by SBNA. Upon origination, the Company remits payment to SBNA, which settles the transaction with the dealer. The Company owed SBNA $5,431 and $7,548 related to such originations as of September 30, 2021 and December 31, 2020, respectively. The Company received a $9,000 referral fee in connection with a sourcing and servicing arrangement and is amortizing the fee into income over the ten-year term of the agreement through July 1, 2022, the termination date of the agreement. As of September 30, 2021 and December 31, 2020, the unamortized fee balance was $1,575 and $2,250, respectively. The Company recognized $225 and $675 of income related to the referral fee for the three and nine months ended September 30, 2021 and 2020, respectively. Origination Support Services Leases Beginning in the second quarter of 2021, the Company agreed to provide SBNA with origination support services in connection with the processing, underwriting and purchase of vehicle leases, primarily from Stellantis dealers, that are funded and owned by SBNA. In addition, the Company has agreed to perform the servicing for any leases originated by SBNA. Servicing fee income recognized on leases serviced for SBNA totaled $65 for the three and nine months ended September 30, 2021 Other information on the consumer vehicle lease portfolio serviced for SBNA as of September 30, 2021 and December 31, 2020 is as follows: September 30, 2021 December 31, 2020 Total serviced portfolio $ 243,531 $ — Origination and servicing fees receivable 342 — Revenue share reimbursement receivable 48 — Retail installment contracts Beginning in 2018, the Company agreed to provide SBNA with origination support services in connection with the processing, underwriting and purchase of retail loans, primarily from Stellantis dealers. In addition, the Company agreed to perform the servicing for any loans originated by SBNA. For the three and nine months ended September 30, 2021, the Company facilitated the purchase of $1.5 billion and $6.1 billion of retail installment contacts, respectively. For the three and nine months ended September 30, 2020, the Company facilitated the purchase of $1.1 billion and $3.9 billion of retail installment contacts, respectively. The Company recognized origination fee and servicing fee income of $13,408, $40,477, $7,902 and $29,457 for the three and nine months ended September 30, 2021 and 2020, respectively, of which $1,987 and $4,089 was receivable as of September 30, 2021 and 2020, respectively. Securitizations The Company had a Master Securities Purchase Agreement (MSPA) with Santander, whereby the Company had the option to sell a contractually determined amount of eligible prime loans to Santander, through the SPAIN securitization platform, for a term that ended in December 2018. The Company provides servicing on all loans originated under this arrangement. For the three and nine months ended September 30, 2021 and 2020, the Company received the servicing fee income of $1,970, $7,263, $4,488 and $15,680, respectively, for the servicing of these loans. Servicing fee receivable, as of September 30, 2021 and December 31, 2020, was $614 and $1,070, respectively. The Company had $4,789 and $6,203 of collections due to Santander, as of September 30, 2021 and December 31, 2020, respectively. Santander Investment Securities Inc. (SIS), an affiliated entity, serves as joint book runner and co-manager on certain of the Company’s securitizations. Amounts paid to SIS for the three months ended September 30, 2021 and 2020 totaled $1,354 and $103, respectively, and totaled $4,059 and $1,625 for the nine months ended September 30, 2021 and 2020, respectively, and are included in debt issuance costs in the accompanying condensed consolidated financial statements. Employee compensation Certain employees of the Company and SHUSA provide services to each other. For the nine months ended September 30, 2021 and 2020, the Company owed SHUSA approximately $14,496 and $9,221 and SHUSA owed the Company approximately $4,467 and $4,198 for such services, respectively. Other related-party transactions • The Company subleases approximately 13,000 square feet of its corporate office space to SBNA. For the three months ended September 30, 2021 and 2020, the Company recorded $44 and for the nine months ended September 30, 2021 and 2020, the Company recorded $132 in sublease revenue on this property. • The Company has certain deposit and checking accounts with SBNA. As of September 30, 2021 and December 31, 2020, the Company had a balance of $2,016,932 and $32,490, respectively, in these accounts. • The Company has collateral accounts with SBNA with balances as of September 30, 2021 and December 31, 2020 of $6,808 and $27, respectively, in these accounts. • The Company and SBNA have a Credit Card Agreement (Card Agreement) whereby SBNA provides credit card services for travel and related business expenses for vendor payments. This service is at zero cost but generates rebates based on purchases made. As of September 30, 2021, the activities associated with the program were insignificant. • The Company pays SBNA a market rate-based fee expense for payments made at SBNA retail branch locations for accounts originated or serviced by the Company and the costs associated with modifying the Advanced Teller platform to the payments. The Company incurred expenses totaled $33 and $39 for the three months ended September 30, 2021 and 2020, respectively, and $100 and $140 for the nine months ended September 30, 2021 and 2020, respectively. • The Company has contracted Aquanima, a Santander affiliate, to provide procurement services. Expenses incurred totaled $1,062 and $785 for the three months ended September 30, 2021, and 2020, respectively, and totaled $2,635 and $2,079 for the nine months ended September 30, 2021 and 2020, respectively. • Santander Global Tech (formerly known as Produban Servicios Informaticos Generales S.L.), a Santander affiliate, provides professional services, telecommunications, and internal and/or external applications to the Company. Expenses incurred, which are included as a component of other operating costs in the accompanying consolidated statements of income, totaled zero and $279 for the three months ended September 30, 2021 and 2020, respectively, and zero and $350 for the nine months ended September 30, 2021 and 2020, respectively. • The Company partners with SHUSA to place Cyber Liability Insurance in which participating worldwide Santander entities share €270 million aggregate limits. The Company repays SHUSA for the Company’s equitably allocated portion of insurance premiums and fees. Expenses incurred totaled $150 and $97 for the three months ended September 30, 2021 and 2020, respectively, and totaled $451 and $313 for the nine months ended September 30, 2021 and 2020, respectively. In addition, the Company partners with SHUSA for various other insurance products. Expenses incurred totaled $661 and $416 for the three months ended September 30, 2021 and 2020, respectively, and totaled $1,687 and $781 and for the nine months ended September 30, 2021 and 2020, respectively. • In July 2021, the Company entered into a Platform Development and License Agreement ("PDLA") with AutoFi Inc. for the design and operation of a digital software platform for the sale and financing of automobiles. Mouro Capital, which is a wholly-owned subsidiary of Santander, owns 10.3% of the total equity of AutoFi Inc. The PDLA, requires the Company to pay $6,000 for the design and development of the digital software platform in the first year of the PDLA. After the first year of the PDLA, the Company has agreed to pay AutoFi, Inc. between $2,400 and $3,000 per year plus certain transaction-related fees for software development, dealer onboarding and support, and hosting services.

Employee Benefit Plans

Employee Benefit Plans	9 Months Ended
Employee Benefit Plans	Sep. 30, 2021
Share-based Payment Arrangement [Abstract]
Employee Benefit Plans	Employee Benefit Plans The Company has granted stock options to certain executives, other employees, and independent directors under the Company’s 2011 Management Equity Plan (the MEP), which enabled the Company to grant stock option awards up to a total of approximately 29 million common shares (net of shares canceled and forfeited). The MEP expired in January 2015, and the Company will not grant any further awards under the MEP. The Company has granted stock options, restricted stock awards and restricted stock units (RSUs) under the Omnibus Incentive Plan (the Plan), which was established in 2013 and enables the Company to grant awards of cash and of non-qualified and incentive stock options, stock appreciation rights, restricted stock awards, RSUs, and other awards that may be settled in or based upon the value of the Company’s common stock up to a total of 5,192,641 shares of common stock. The Plan was amended and restated as of June 16, 2016. Stock options granted under the MEP and the Plan have an exercise price based on the estimated fair market value of the Company’s common stock on the grant date. The stock options expire ten years after grant date and include both time vesting options and performance vesting options. The fair value of the stock options is amortized into expense over the vesting period as time and performance vesting conditions are met. In connection with compensation restrictions imposed on certain executive officers and other employees by the European Central Bank under the Capital Requirements Directive IV prudential rules, which require a portion of such officers’ and employees’ variable compensation to be paid in the form of equity, the Company periodically grants RSUs. Under the Plan, a portion of these RSUs vest immediately upon grant, and a portion vest annually over the following three directors RSUs that vest upon the earlier of the first anniversary of grant date or the first annual stockholder meeting following the grant date. RSUs are valued based upon the fair market value on the date of the grant. The Company recognized $8,989 and $6,161 related to stock options and restricted stock units within compensation expense for the nine months ended September 30, 2021 and 2020 , respectively. In addition, the Company recognizes forfeitures of awards as they occur. A summary of the Company’s stock options and related activity as of and for the nine months ended September 30, 2021 is as follows: Shares Weighted Weighted Aggregate Options outstanding at January 1, 2021 169,369 $ 13.01 1.9 $ 1,543 Granted — — — — Exercised (77,885) 10.08 — 1,650 Expired — — — — Forfeited — — — — Other (a) — — — — Options outstanding at September 30, 2021 91,484 15.51 1.8 2,396 Options exercisable at September 30, 2021 91,484 $ 15.51 1.8 $ 2,396 Options expected to vest at September 30, 2021 — $ — 0 $ — (a) Represents stock options that were reinstated. A summary of the Company’s Restricted Stock Units and performance stock units and related activity as of and for the nine months ended September 30, 2021 is as follows: Shares Weighted Weighted Aggregate Outstanding as of January 1, 2021 367,012 $ 19.78 0.8 $ 8,082 Granted 438,435 27.71 — — Vested (401,549) 23.04 — 10,847 Forfeited/canceled (7,549) 14.67 — — Non-vested at September 30, 2021 396,349 $ 25.10 1.1 $ 16,528

Description of Business, Basi_2

Description of Business, Basis of Presentation, and Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The accompanying condensed consolidated financial statements include the accounts of the Company and its consolidated subsidiaries, including certain Trusts that are considered VIEs. The Company also consolidates other VIEs for which it is deemed to be the primary beneficiary. All significant intercompany balances and transactions have been eliminated in consolidation. These condensed consolidated financial statements have been prepared in accordance with GAAP and pursuant to SEC regulations. In the opinion of management, the accompanying condensed consolidated financial statements reflect all adjustments of a normal and recurring nature necessary for a fair statement of the Consolidated Balance Sheets, Statements of Operations, Statements of Comprehensive Income, Statements of Stockholder's Equity and Statement of Cash Flow for the interim periods indicated, and contain adequate disclosure to make the information presented not misleading. Results of operations for the periods presented herein are not necessarily indicative of results of operations for the entire year. These financial statements should be read in conjunction with the Annual Report of the Company on Form 10-K for the year ended December 31, 2020 (the "2020 Annual Report on Form 10-K").
Use of Estimates	Use of Estimates The preparation of condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts in the financial statements and accompanying notes. Actual results could differ from those estimates and those differences may be material. The most significant estimates include the determination of credit loss allowance, fair value measurements, expected end-of-term lease residual values, and income taxes. These estimates, although based on actual historical trends and modeling, may show significant variances over time.
Business Segment Information	Business Segment Information The Company has one reportable segment, Consumer Finance, which includes the Company’s vehicle financial products and services, including retail installment contracts, vehicle leases, and financial products and services related to recreational vehicles and marine vehicles.

Finance Receivables (Tables)

Finance Receivables (Tables)	9 Months Ended
Finance Receivables (Tables)	Sep. 30, 2021
Receivables [Abstract]
Summary of Financing Receivables Held for Investment	Finance receivables held for investment, net is comprised of the following at September 30, 2021 and December 31, 2020: September 30, 2021 December 31, 2020 Retail installment contracts, net (a) $ 27,461,064 $ 26,975,368 Purchased receivables - credit deteriorated 1,440 6,197 Finance lease receivables (Note 4) 21,237 22,440 Finance receivables held for investment, net $ 27,483,741 $ 27,004,005 (a) The Company has elected the fair value option for certain retail installment contracts reported in finance receivables held for investment, net. As of September 30, 2021 and December 31, 2020, $6,170 and $5,614 of loans were recorded at fair value, respectively (Note 10). The Company’s held for investment portfolio of retail installment contracts is comprised of the following at September 30, 2021 and December 31, 2020: September 30, 2021 Retail Installment Contracts Non-TDR TDR Unpaid principal balance $ 28,779,433 $ 3,952,344 ACL (4,398,303) (1,297,841) Discount/(premium) (net of subvention and participation) 326,675 (3,601) Capitalized origination costs and fees 98,549 3,808 Net carrying balance $ 24,806,354 $ 2,654,710 ACL as a percentage of unpaid principal balance 15.3 % 32.8 % ACL and discount as a percentage of unpaid principal balance 14.1 % 32.9 % December 31, 2020 Retail Installment Contracts Non-TDR TDR Unpaid principal balance $ 28,977,299 $ 3,945,040 ACL (4,792,464) (1,314,170) Discount (net of subvention and participation) 66,373 (8,389) Capitalized origination costs and fees 97,638 4,041 Net carrying balance $ 24,348,846 $ 2,626,522 ACL as a percentage of unpaid principal balance 16.5 % 33.3 % ACL and discount as a percentage of unpaid principal balance 16.3 % 33.5 %
Schedule of Carrying Values of Finance Receivables Held for Sale	The carrying value of the Company’s finance receivables held for sale, net is comprised of the following at September 30, 2021 and December 31, 2020: September 30, 2021 December 31, 2020 Retail installment contracts acquired individually $ 359,561 $ 674,048 Personal loans (a) — 893,479 (a) On March 31, 2021, the Company sold the personal lending portfolio. Refer to Note 1 – “Description of Business, Basis of Presentation, and Accounting Principles” to these Condensed Consolidated Financial Statements for more information.
Schedule of Sales of Retail Installment Contracts and Charged-off Assets	Sales of retail installment contracts, personal loans to third parties (unpaid principal balance), and proceeds from sales of charged-off assets for the three and nine months ended September 30, 2021 and 2020 were as follows: Three Months Ended Nine Months Ended September 30, 2021 September 30, 2020 September 30, 2021 September 30, 2020 Sales of retail installment contracts to third parties $ 277,898 $ 636,301 $ 2,968,467 $ 1,148,587 Sales of Personal Loans to third parties — — 1,253,746 — Proceeds from sales of charged-off assets to third parties — 9,144 13,901 30,019

Allowance for Credit Loss and_2

Allowance for Credit Loss and Credit Quality (Tables)	9 Months Ended
Allowance for Credit Loss and Credit Quality (Tables)	Sep. 30, 2021
Credit Loss [Abstract]
Summary of Activity in Loan Loss Allowance	The activity in the ACL for the retail installment contracts for the three and nine months ended September 30, 2021 and 2020 was as follows: Three Months Ended September 30, 2021 September 30, 2020 Retail Installment Contracts Non-TDR TDR Non-TDR TDR Balance — beginning of period $ 4,299,670 $ 1,514,994 $ 4,818,187 $ 1,037,628 Credit loss expense (benefit) 188,195 (144,772) 24,841 314,075 Charge-offs (427,659) (206,111) (334,938) (200,352) Recoveries 338,097 133,730 392,042 97,171 Balance — end of period $ 4,398,303 $ 1,297,841 $ 4,900,132 $ 1,248,522 Nine Months Ended September 30, 2021 September 30, 2020 Retail Installment Contracts Non-TDR TDR Non-TDR TDR Balance — beginning of period $ 4,792,464 $ 1,314,170 $ 2,123,878 $ 914,718 Day 1 - Adjustment to allowance for adoption of CECL standard — — 2,030,473 71,833 Credit loss expense (benefit) (252,963) 169,268 1,526,545 581,344 Charge-offs (a) (1,356,482) (599,083) (1,955,706) (617,536) Recoveries 1,215,284 413,486 1,174,942 298,163 Balance — end of period $ 4,398,303 $ 1,297,841 $ 4,900,132 $ 1,248,522 (a) Charge-offs decreased significantly, primarily driven by macro-economic improvements. Additionally, Charge-offs for retail installment contracts includes partial write-down of loans to the collateral value less estimated costs to sell, for which a bankruptcy notice was received. There is no additional ACL on these loans.
Summary of Delinquencies	A summary of delinquencies as of September 30, 2021, and December 31, 2020 is as follows: September 30, 2021 Finance Receivables Held for Investment Retail Installment Contract Loans Purchased Receivables Portfolios - credit deteriorated Total Percent Amortized cost, 30-59 days past due $ 2,253,907 $ 401 $ 2,254,308 6.8 % Amortized cost over 59 days 1,106,673 400 1,107,073 3.3 % Total delinquent balance at amortized cost (a) $ 3,360,580 $ 801 $ 3,361,381 10.1 % (a) The amount of accrued interest excluded from the disclosed amortized cost table is $63,205. December 31, 2020 Finance Receivables Held for Investment Retail Installment Contract Loans Purchased Receivables Portfolios - credit impaired Total Percent Amortized cost, 30-59 days past due $ 1,971,766 $ 687 $ 1,972,453 6.0 % Amortized cost over 59 days 1,038,869 441 1,039,310 3.1 % Total delinquent balance at amortized cost (a) $ 3,010,635 $ 1,128 $ 3,011,763 9.1 % (a) The amount of accrued interest excluded from the disclosed amortized cost table is $73,794.
Summary of Financing Receivables on Nonaccrual Status	The amortized cost basis of financial instruments that are either non-accrual with related expected credit loss or non-accrual without related expected credit loss for retail installment contracts is as follows: September 30, 2021 Non-accrual loans Non-accrual loans with no allowance (a) Interest income recognized on nonaccrual loans (YTD) Non-accrual loans as a percent of total amortized cost Non-TDR $ 818,292 $ 157,314 $ 46,445 2.5 % TDR 391,834 47,281 26,576 1.2 % Total non-accrual loans $ 1,210,126 $ 204,595 $ 73,021 3.7 % December 31, 2020 Non-accrual loans Non-accrual loans with no allowance (a) Interest income recognized on nonaccrual loans (YTD) Non-accrual loans as a percent of total amortized cost Non-TDR $ 748,026 $ 145,287 $ 72,926 2.3 % TDR 385,021 46,498 35,620 1.2 % Total nonaccrual loans $ 1,133,047 $ 191,785 $ 108,546 3.5 % (a) These represent loans for which a bankruptcy notice was received and that have been partially written down to the collateral value less estimated costs to sell. Accordingly, there is no additional ACL on these loans.
Financing Receivable Credit Quality Indicators	Total September 30, 2021 2020 2019 2018 2017 2016 Prior Amount % No-FICO ® s 1,603 1,173 738 337 266 112 50 4,279 12.9% <540 1,573 1,306 948 608 283 151 125 4,994 15.1% 540-599 4,364 3,038 2,030 1,134 413 234 156 11,369 34.3% 600-639 2,828 1,831 1,182 625 201 123 65 6,855 20.7% >=640 (a) 2,345 1,655 853 506 151 105 45 5,660 17.0% Total (b) $ 12,713 $ 9,003 $ 5,751 $ 3,210 $ 1,314 $ 725 $ 441 $ 33,157 100.00% (a) Beginning in 2021, loans with FICO score of 640 are disclosed in the >=640 category. (b) The amount of accrued interest excluded from the disclosed amortized cost table is $323 million . Total December 31, 2020 2019 2018 2017 2016 2015 Prior Amount % No-FICO ® s 1,760 1,151 530 501 247 128 26 4,343 13.1% <540 1,789 1,370 913 454 263 186 90 5,065 15.3% 540-599 4,269 3,005 1,736 673 423 264 96 10,466 31.7% 600-639 2,759 1,838 990 335 230 126 47 6,325 19.1% >640 (a) 4,040 1,411 810 265 200 124 33 6,883 20.8% Total (b) $ 14,617 $ 8,775 $ 4,979 $ 2,228 $ 1,363 $ 828 $ 292 $ 33,082 100.0% (a) As of December 31, 2020, loans with FICO score of 640 were included in the 600-639 category. (b) The amount of accrued interest excluded from the disclosed amortized cost table is $416 million .
Summary of TDRs	The table below presents the Company’s amortized cost of TDRs as of September 30, 2021 and December 31, 2020: September 30, 2021 December 31, 2020 Retail Installment Contracts Amortized Cost (including accrued interest) (a) $ 3,980,920 $ 4,011,780 Impairment (1,297,841) (1,314,170) Amortized cost including accrued interest, net of impairment $ 2,683,079 $ 2,697,610 (a) As of September 30, 2021, this balance excludes $56.2 million of collateral-dependent bankruptcy TDRs that have been written down by $8.9 million to fair value less cost to sell. As of December 31, 2020, this balance excludes $67.9 million of collateral-dependent bankruptcy TDRs that have been written down by $21.4 million to fair value less cost to sell. A summary of the amortized cost of the Company’s delinquent TDRs at September 30, 2021 and December 31, 2020 is as follows: September 30, 2021 December 31, 2020 Retail Installment Contracts 30-59 days past due $ 744,637 $ 637,560 Delinquent balance over 59 days 381,840 344,776 Total delinquent TDRs $ 1,126,477 $ 982,336 Average amortized cost and interest income recognized on TDR loans are as follows: Three Months Ended Nine Months Ended September 30, 2021 September 30, 2020 September 30, 2021 September 30, 2020 Retail Installment Contracts Retail Installment Contracts Average amortized cost (including accrued interest) $ 4,142,089 $ 3,960,119 $ 4,203,685 $ 3,802,823 Interest income recognized 212,073 165,637 635,188 457,642 The following table summarizes the financial effects, excluding impacts related to credit loss allowance and impairment, of TDRs that occurred for the three and nine months ended September 30, 2021 and 2020: Three Months Ended Nine Months Ended September 30, 2021 September 30, 2020 September 30, 2021 September 30, 2020 Retail Installment Contracts Retail Installment Contracts Amortized cost (including accrued interest) before TDR $ 219,898 $ 317,455 $ 1,326,077 $ 1,399,813 Amortized cost (including accrued interest) after TDR (a) 220,679 319,027 1,333,257 1,417,480 Number of contracts (not in thousands) 12,063 14,620 67,354 69,786 (a) excluding collateral-dependent bankruptcy TDRs Three Months Ended Nine Months Ended September 30, 2021 September 30, 2020 September 30, 2021 September 30, 2020 Retail Installment Contracts Retail Installment Contracts Amortized cost (including accrued interest) in TDRs that subsequently defaulted (a)` $ 91,260 $ 83,002 $ 283,914 $ 183,871 Number of contracts (not in thousands) 4,724 4,379 14,496 10,467

Leases (SC as Lessor) (Tables)

Leases (SC as Lessor) (Tables)	9 Months Ended
Leases (SC as Lessor) (Tables)	Sep. 30, 2021
Leases [Abstract]
Assets And Liabilities, Lessee	Leased vehicles, net, which is comprised of leases originated under the MPLFA, consisted of the following as of September 30, 2021 and December 31, 2020: September 30, 2021 December 31, 2020 Leased vehicles $ 20,032,832 $ 22,056,063 Less: accumulated depreciation (3,920,416) (4,796,595) Depreciated net capitalized cost 16,112,416 17,259,468 Manufacturer subvention payments, net of accretion (700,783) (934,381) Origination fees and other costs 117,977 66,020 Net book value $ 15,529,610 $ 16,391,107
Summary of Maturity of Operating Lease Payments to be Received	The following summarizes the maturity analysis of lease payments due to the Company, as lessor, under operating leases as of September 30, 2021: Remainder of 2021 $ 910,739 2022 2,101,818 2023 1,363,807 2024 286,598 2025 25,093 Thereafter 1,295 Total $ 4,689,350
Schedule of Finance Lease Receivables, Net	Finance lease receivables, net consisted of the following as of September 30, 2021 and December 31, 2020: September 30, 2021 December 31, 2020 Gross investment in finance leases $ 33,498 $ 34,461 Origination fees and other 283 289 Less: unearned income (8,990) (8,311) Net investment in finance leases before allowance 24,791 26,439 Less: allowance for lease losses (3,554) (3,999) Net investment in finance leases $ 21,237 $ 22,440
Summary of Maturity of Finance Lease Payments to be Received	The following summarizes the maturity analysis of lease payments due to the Company, as lessor, under finance leases as of September 30, 2021: Remainder of 2021 $ 2,688 2022 10,275 2023 8,547 2024 6,509 2025 4,054 Thereafter 1,425 Total $ 33,498

Other Assets (Tables)

Other Assets (Tables)	9 Months Ended
Other Assets (Tables)	Sep. 30, 2021
Other Assets, Leases And Investments [Abstract]
Schedule of Other Assets	Other assets were comprised as follows: September 30, 2021 December 31, 2020 Vehicles (a) $ 269,627 $ 311,557 Manufacturer subvention payments receivable (b) 29,361 57,996 Upfront fee (b) 47,015 69,286 Derivative assets at fair value (c) 13,314 4,740 Derivative - collateral 23,037 92,132 Operating leases (Right-of-use-assets) 61,590 46,441 Available-for-sale debt securities 90,688 95,654 Held-to-maturity debt securities (d) 101,874 44,875 Equity securities not held for trading 2,671 1,380 Prepaids 35,152 45,667 Accounts receivable 28,737 34,607 Federal and State tax receivable 76,113 99,666 Other 32,418 68,725 Other assets $ 811,597 $ 972,726 (a) Includes vehicles recovered through repossession as well as vehicles recovered due to lease terminations. (b) These amounts relate to the MPLFA . The Company paid a $150,000 upfront fee upon the May 2013 inception of the MPLFA . The fee is being amortized into finance and other interest income over a ten-year term. In addition, in June 2019, in connection with the execution of an amendment to the MPLFA , the Company paid a $60,000 upfront fee to Stellantis. This fee is being amortized into finance and other interest income over the remaining term of the MPLFA . (c) Derivative assets at fair value represent the gross amount of derivatives presented in the condensed consolidated financial statements. Refer to Note 9 - "Derivative Financial Instruments" to these Condensed Consolidated Financial Statements for the detail of these amounts.
Supplemental Information Related to Operating Leases	Supplemental information relating to these operating leases is as follows: September 30, 2021 December 31, 2020 Operating leases-right of use assets $ 61,590 $ 46,441 Other liabilities 77,854 64,927 Weighted average lease term 6.2 5.5 Weighted average discount rate 2.7 % 3.4 %
Schedule of Maturity of Lease Liabilities	The maturity of lease liabilities at September 30, 2021 are as follows: September 30, 2021 2021 $ 4,078 2022 17,409 2023 14,343 2024 14,313 2025 14,397 Thereafter 18,029 Total $ 82,569 Less: Interest (4,715) Present value of lease liabilities $ 77,854
Schedule of Debt Securities, AFS	The following tables present the amortized cost, gross unrealized gains and losses and approximate fair values of debt securities available-for-sale and held-to-maturity debt securities: September 30, 2021 Amortized cost (before unrealized gains / losses) Gross Unrealized gain Gross Unrealized loss Fair value Available-for-sale debt securities (US Treasury securities) $ 89,437 $ 1,251 $ — $ 90,688 Held-to-maturity debt securities (Asset-Backed Notes) $ 101,815 $ 634 $ — $ 102,449 Contractual Maturities The contractual maturities of available-for-sale and held-to-maturity debt instruments are summarized in the following table: September 30, 2021 Available-for-sale debt securities Held-to-maturity debt securities Amortized cost Fair value Amortized cost Fair value Due within one year $ 66,924 $ 67,650 $ — $ — Due after one year but within 5 years 22,513 23,038 48,200 48,491 Due after 5 year but within 10 years — — 53,615 53,958 Total $ 89,437 $ 90,688 $ 101,815 $ 102,449

Variable Interest Entities (Tab

Variable Interest Entities (Tables)	9 Months Ended
Variable Interest Entities (Tables)	Sep. 30, 2021
Variable Interest Entity Disclosure [Abstract]
Schedule of Variable Interest Entities	The assets of consolidated VIEs, presented based upon the legal transfer of the underlying assets in order to reflect legal ownership, that can be used only to settle obligations of the consolidated VIE and the liabilities of these entities for which creditors (or beneficial interest holders) do not have recourse to the Company’s general credit were as follows: September 30, 2021 December 31, 2020 Assets Restricted cash $ 1,682,654 $ 1,737,021 Finance receivables held for sale, net 113,313 581,938 Finance receivables held for investment, net 21,785,308 22,572,549 Leased vehicles, net 15,529,610 16,391,107 Various other assets 706,130 791,306 Total assets $ 39,817,015 $ 42,073,921 Liabilities Notes payable $ 30,632,558 $ 31,700,709 Various other liabilities 107,743 84,922 Total liabilities $ 30,740,301 $ 31,785,631
Summary of Cash Flows Received from Consolidated Securitization Trusts	A summary of the cash flows received from consolidated securitization Trusts during the three and nine months ended September 30, 2021 and 2020, is as follows: Three Months Ended Nine Months Ended September 30, 2021 September 30, 2020 September 30, 2021 September 30, 2020 Assets securitized $ 7,095,782 $ 5,282,901 $ 18,457,441 $ 15,845,707 Net proceeds from new securitizations (a) $ 6,591,786 $ 4,662,211 $ 16,168,394 $ 11,470,857 Net proceeds from retained bonds — 1,293 195,967 57,286 Cash received for servicing fees (b) 228,194 242,245 686,789 735,533 Net distributions from Trusts (b) 1,391,970 1,173,276 4,435,605 2,730,657 Total cash received from Trusts $ 8,211,950 $ 6,079,025 $ 21,486,755 $ 14,994,333 (a) Includes additional advances on existing securitizations. (b) These amounts are not reflected in the accompanying condensed consolidated statements of cash flows because these cash flows are intra-company and eliminated in consolidation. A summary of the cash flows received from off-balance sheet securitization Trusts for the three and nine months ended September 30, 2021 and 2020, is as follows: Three Months Ended Nine Months Ended September 30, 2021 September 30, 2020 September 30, 2021 September 30, 2020 Receivables securitized (a) $ — $ 636,301 $ 1,891,278 $ 1,148,587 Net proceeds from new securitizations — 592,455 1,779,532 1,052,541 Cash received for servicing fees 8,041 6,598 24,061 17,856 Total cash received from securitization trusts 8,041 599,053 $ 1,803,593 $ 1,070,397
Off-balance Sheet Variable Interest Entities Portfolio	The portfolio was comprised as follows: September 30, 2021 December 31, 2020 Related party SPAIN serviced securitizations $ 687,158 $ 1,214,644 Third party SCART serviced securitizations 2,067,156 929,429 Third party CCAP serviced securitizations — 82,713 Total serviced for others portfolio $ 2,754,314 $ 2,226,786

Debt (Tables)

Debt (Tables)	9 Months Ended
Debt (Tables)	Sep. 30, 2021
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments	Total borrowings and other debt obligations as of September 30, 2021 and December 31, 2020 consists of: September 30, 2021 December 31, 2020 Notes Payable — Facilities with Third Parties $ — $ 4,159,955 Notes Payable — Secured Structured Financings 28,831,858 26,177,401 Notes Payable — Facilities with Santander and Related Subsidiaries (a) 9,600,000 10,801,318 $ 38,431,858 $ 41,138,674
Schedule of Credit Facilities	The following table presents information regarding the Company’s credit facilities as of September 30, 2021 and December 31, 2020: September 30, 2021 Maturity Date(s) Utilized Balance Committed Amount Effective Rate Assets Pledged Restricted Cash Pledged Facilities with third parties: Warehouse line June 2023 $ — $ 500,000 —% $ 367,404 $ — Warehouse line March 2023 — 1,250,000 —% 246,480 1 Warehouse line October 2022 — 1,500,000 —% 121,046 — Warehouse line October 2022 — 3,500,000 —% 133,429 — Warehouse line October 2022 — 500,000 —% 13,409 500 Warehouse line October 2022 — 2,100,000 —% 175,624 64 Warehouse line January 2023 — 1,000,000 —% 477,840 — Warehouse line November 2022 — 500,000 —% 279,703 — Warehouse line July 2022 — 900,000 —% — — Total facilities with third parties — 11,750,000 1,814,935 565 Facilities with Santander and related subsidiaries: Promissory Note December 2021 250,000 250,000 3.58% — — Promissory Note December 2022 250,000 250,000 3.82% — — Promissory Note December 2023 250,000 250,000 5.07% — — Promissory Note December 2022 250,000 250,000 4.83% — — Promissory Note May 2023 350,000 350,000 3.67% — — Promissory Note November 2022 400,000 400,000 2.90% — — Promissory Note April 2023 450,000 450,000 5.92% — — Promissory Note June 2022 500,000 500,000 3.19% — — Promissory Note July 2024 500,000 500,000 3.77% — — Promissory Note March 2022 650,000 650,000 4.06% — — Promissory Note September 2023 750,000 750,000 3.17% — — Promissory Note May 2025 1,000,000 1,000,000 3.86% — — Promissory Note June 2022 2,000,000 2,000,000 2.03% — — Promissory Note September 2022 2,000,000 2,000,000 1.01% — — Line of credit July 2024 — 500,000 2.08% — — Line of credit March 2023 — 2,500,000 3.28% — — Total facilities with Santander and related subsidiaries 9,600,000 12,600,000 — — Total revolving credit facilities $ 9,600,000 $ 24,350,000 $ 1,814,935 $ 565 (a) In 2017, the Company entered into an interest rate swap to hedge the interest rate risk on this fixed rate debt. This derivative was designated as fair value hedge at inception. This derivative was later terminated and the unamortized fair value hedge adjustment as of September 30, 2021 and December 31, 2020 was zero and $1.3 million, respectively, the amortization of which reduced interest expense over the life of the fixed rate debt. December 31, 2020 Maturity Date(s) Utilized Balance Committed Amount Effective Rate Assets Pledged Restricted Cash Pledged Facilities with third parties: Warehouse line August 2022 $ — $ 500,000 1.50% $ 159,348 $ — Warehouse line March 2022 942,845 1,250,000 1.34% 1,621,206 1 Warehouse line October 2022 1,000,600 1,500,000 1.85% 639,875 — Warehouse line October 2022 441,143 3,500,000 3.45% 2,057,758 — Warehouse line October 2022 168,300 500,000 3.07% 243,649 1,201 Warehouse line October 2022 845,800 2,100,000 3.29% 1,156,885 — Warehouse line January 2022 415,700 1,000,000 1.81% 595,518 — Warehouse line November 2022 177,600 500,000 1.18% 371,959 — Warehouse line July 2022 — 900,000 1.46% — 1,684 Repurchase facility January 2021 167,967 167,967 1.64% 217,200 — Total facilities with third parties 4,159,955 11,917,967 7,063,398 2,886 Facilities with Santander and related subsidiaries: Promissory Note December 2021 250,000 250,000 3.70% — — Promissory Note December 2022 250,000 250,000 3.95% — — Promissory Note December 2023 250,000 250,000 5.25% — — Promissory Note December 2022 250,000 250,000 5.00% — — Promissory Note May 2021 250,000 250,000 2.25% — — Promissory Note March 2021 300,000 300,000 3.95% — — Promissory Note May 2023 350,000 350,000 3.80% — — Promissory Note November 2022 400,000 400,000 3.00% — — Promissory Note April 2023 450,000 450,000 6.13% — — Promissory Note June 2022 500,000 500,000 3.30% — — Promissory Note July 2024 500,000 500,000 3.90% — — Promissory Note March 2022 650,000 650,000 4.20% — — Promissory Note August 2021 650,000 650,000 3.44% — — Promissory Note September 2023 750,000 750,000 3.27% — — Promissory Note May 2025 1,000,000 1,000,000 3.99% — — Promissory Note June 2022 2,000,000 2,000,000 1.40% — — Promissory Note September 2022 2,000,000 2,000,000 1.04% — — Line of credit July 2021 — 500,000 2.08% — — Line of credit March 2022 — 2,500,000 3.28% — — Total facilities with Santander and related subsidiaries 10,800,000 13,800,000 — — Total revolving credit facilities 14,959,955 25,717,967 7,063,398 2,886
Summary of Secured Structured Financings	The following table presents information regarding secured structured financings as of September 30, 2021 and December 31, 2020: September 30, 2021 Estimated Maturity Date(s) at Issuance Balance Initial Note Amounts Issued (d) Initial Weighted Average Interest Rate Collateral (b) Restricted Cash 2017 Securitizations July 2022 - September 2024 118,293 3,889,470 1.35% - 2.52% 564,070 90,895 2018 Securitizations February 2024 - April 2026 1,606,743 11,000,280 2.41% - 3.42% 2,510,723 264,577 2019 Securitizations May 2024 - February 2027 4,249,645 11,924,720 2.08% - 3.34% 5,788,406 466,789 2020 Securitizations November 2024 - May 2028 5,629,703 10,028,425 0.60% - 2.73% 7,256,352 364,410 2021 Securitizations November 2025 - March 2029 13,052,747 14,986,600 0.48% - 0.65% 15,283,626 479,199 Public Securitizations (a) 24,657,131 51,829,495 31,403,177 1,665,870 2013 Private issuances July 2024 - September 2024 230,404 1,537,025 1.28% 1,015,024 751 2018 Private issuances June 2022 - April 2024 1,452,711 2,200,002 2.42% - 3.17% 2,111,645 — 2019 Private issuance September 2022 - November 2026 1,517,437 3,524,536 2.45% - 3.90% 2,300,073 10,566 2020 Private issuance April 2024 - December 2027 974,175 1,500,000 1.29% - 2.68% 1,330,694 4,902 Privately issued amortizing notes (c) 4,174,727 8,761,563 6,757,436 16,219 Total secured structured financings $ 28,831,858 $ 60,591,058 $ 38,160,613 $ 1,682,089 (a) Securitizations executed under Rule 144A of the Securities Act are included within this balance. (b) Secured structured financings may be collateralized by the Company’s collateral overages of other issuances. (c) All privately issued amortizing notes issued in 2014 through 2017 were paid in full. (d) Excludes securitizations that no longer have outstanding debt and excludes any incremental borrowings. December 31, 2020 Estimated Maturity Date(s) at Issuance Balance Initial Note Amounts Issued Initial Weighted Average Interest Rate Collateral Restricted Cash 2016 Securitizations August 2022 - March 2024 $ 259,078 $ 2,519,810 1.63% - 2.34% $ 354,985 $ 85,041 2017 Securitizations July 2022 - September 2024 1,049,867 8,262,940 1.35% - 2.52% 1,661,845 211,606 2018 Securitizations May 2022 - April 2026 2,723,099 12,039,840 2.41% - 3.42% 4,130,936 376,246 2019 Securitizations May 2024 - February 2027 6,653,226 11,924,720 2.08% - 3.34% 8,582,241 488,546 2020 Securitizations November 2024 - May 2028 8,256,890 10,028,425 0.60% - 2.73% 10,292,570 548,912 Public Securitizations 18,942,160 44,775,735 25,022,577 1,710,351 2013 Private issuances July 2024 - September 2024 777,210 1,537,025 1.28% 1,843,443 751 2018 Private issuances June 2022 - April 2024 2,768,145 4,186,002 2.42%- 3.53% 4,223,567 7,675 2019 Private issuance September 2022 - November 2026 2,584,974 3,524,536 2.45% - 3.90% 3,632,833 10,457 2020 Private issuance April 2024 - December 2027 1,104,912 1,500,000 1.29% - 2.68% 1,532,280 4,902 Privately issued amortizing notes 7,235,241 10,747,563 11,232,123 23,785 Total secured structured financings $ 26,177,401 $ 55,523,298 $ 36,254,700 $ 1,734,136

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	9 Months Ended
Shareholders' Equity (Tables)	Sep. 30, 2021
Equity [Abstract]
Class of Treasury Stock	Please find below the details of the Company's tender offer and other share repurchase programs for the three and nine months ended September 30, 2021 and 2020 : Three Months Ended Nine Months Ended September 30, 2021 September 30, 2020 September 30, 2021 September 30, 2020 Tender offer (a): Number of shares purchased — — — 17,514,707 Average price per share $ — $ — $ — $ 26.00 Cost of shares purchased (b) $ — $ — $ — $ 455,382 Other share repurchases: Number of shares purchased — 10,198,800 357,747 15,956,561 Average price per share $ — $ 21.91 $ 26.46 $ 20.00 Cost of shares purchased (b) $ — $ 223,485 $ 9,468 $ 319,075 Total number of shares purchased — 10,198,800 357,747 33,471,268 Average price per share $ — $ 21.91 $ 26.46 $ 23.14 Total cost of shares purchased (b) $ — $ 223,485 $ 9,468 $ 774,457 (a) During the three months ended March 31, 2020, the Company purchased shares of its common stock through a modified Dutch Auction Tender Offer. (b) Cost of shares exclude commissions
Summary of Changes in Accumulated Other Comprehensive Income (Loss), Net of Tax	A summary of changes in accumulated other comprehensive income (loss), net of tax, for the three and nine months ended September 30, 2021 and 2020 is as follows: Three Months Ended Nine Months Ended September 30, 2021 September 30, 2020 September 30, 2021 September 30, 2020 Beginning balance, unrealized gains (losses) $ (36,855) $ (63,705) $ (50,566) $ (26,693) Other comprehensive income (loss) before reclassifications (gross) 414 94 2,603 (43,212) Amounts (gross) reclassified out of accumulated other comprehensive income (loss) 5,247 6,729 16,769 13,023 Ending balance, unrealized gains (losses) $ (31,194) $ (56,882) $ (31,194) $ (56,882)
Reclassification of Amounts Out of Accumulated Other Comprehensive Income (Loss)	Amounts (gross) reclassified out of accumulated other comprehensive income (loss) during the three and nine months ended September 30, 2021 and 2020 consist of the following: Three Months Ended Nine Months Ended Income statement line item Reclassification September 30, 2021 September 30, 2020 September 30, 2021 September 30, 2020 Cash flow hedges $ 6,946 $ 8,939 $ 22,254 $ 17,260 Interest expense Tax benefit (1,699) (2,210) (5,485) (4,237) Net of tax $ 5,247 $ 6,729 $ 16,769 $ 13,023

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	9 Months Ended
Derivative Financial Instruments (Tables)	Sep. 30, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Summary of Underlying Notional Amounts and Aggregate Fair Values	The underlying notional amounts of these derivative financial instruments at September 30, 2021 and December 31, 2020, are as follows: September 30, 2021 December 31, 2020 Notional Asset Liability Notional Asset Liability Interest rate swap agreements designated as cash flow hedges $ — $ — $ — $ 2,450,000 $ 123 $ (70,589) Interest rate swap agreements not designated as hedges 250,000 — (8,085) 250,000 — (12,934) Interest rate cap agreements 7,649,971 13,314 — 10,199,134 4,617 — Options for interest rate cap agreements 7,649,971 — (13,314) 10,199,134 — (4,617)
Schedule of Offsetting Financial Assets	Information on the offsetting of derivative assets and derivative liabilities due to the right of offset was as follows, as of September 30, 2021 and December 31, 2020: Gross Amounts Not Offset in the Assets Presented in the Collateral Net September 30, 2021 Interest rate caps - Santander and affiliates $ 2,334 $ (2,334) $ — Interest rate caps - third party 10,980 (10,980) — Total derivatives subject to a master netting arrangement or similar arrangement 13,314 (13,314) — Total derivatives not subject to a master netting arrangement or similar arrangement — — — Total derivative assets $ 13,314 $ (13,314) $ — Total financial assets $ 13,314 $ (13,314) $ — December 31, 2020 Interest rate swaps - third party (b) $ 123 $ (123) $ — Interest rate caps - Santander and affiliates 463 (463) — Interest rate caps - third party 4,154 (4,154) — Total derivatives subject to a master netting arrangement or similar arrangement 4,740 (4,740) — Total derivatives not subject to a master netting arrangement or similar arrangement — — — Total derivative assets $ 4,740 $ (4,740) $ — Total financial assets $ 4,740 $ (4,740) $ — (a) Collateral received includes cash, cash equivalents, initial margin and other financial instruments. Cash collateral received is reported in Other liabilities in the consolidated balance sheet. Financial instruments that are pledged to the Company are not reflected in the accompanying balance sheet since the Company does not control or have the ability of rehypothecation of these instruments. In certain instances, the counter party is over-collateralized since the actual amount of collateral received exceeds the associated financial asset. As a result, the actual amount of collateral received that is reported may be greater than the amount shown in the table above. (b) Includes derivative instruments originally transacted with Santander and affiliates and subsequently amended to reflect clearing with central clearing counterparties.
Schedule of Offsetting Financial Liabilities	Gross Amounts Not Offset in the Liabilities Presented in the Collateral Net September 30, 2021 Interest rate swaps - third party (b) $ 8,085 $ (8,085) $ — Interest rate caps - Santander and affiliates 2,334 (2,334) — Interest rate caps - third party 10,980 (4,885) 6,095 Total derivatives subject to a master netting arrangement or similar arrangement 21,399 (15,304) 6,095 Total derivatives not subject to a master netting arrangement or similar arrangement — — — Total derivative liabilities $ 21,399 $ (15,304) $ 6,095 Total financial liabilities $ 21,399 $ (15,304) $ 6,095 December 31, 2020 Interest rate swaps - third party $ 83,523 $ (83,523) $ — Interest rate caps - Santander and affiliates 463 (463) — Interest rate caps - third party 4,154 (4,154) — Total derivatives subject to a master netting arrangement or similar arrangement 88,140 (88,140) — Total derivatives not subject to a master netting arrangement or similar arrangement — — — Total derivative liabilities $ 88,140 $ (88,140) $ — Total financial liabilities $ 88,140 $ (88,140) $ — (a) Collateral pledged includes cash, cash equivalents, initial margin and other financial instruments. These balances are reported in Other assets in the consolidated balance sheet. In certain instances, the Company is over-collateralized since the actual amount of collateral pledged exceeds the associated financial liability. As a result, the actual amount of collateral pledged that is reported in Other assets may be greater than the amount shown in the table above. (b) Includes derivative instruments originally transacted with Santander and affiliates and subsequently amended to reflect clearing with central clearing counterparties.
Schedule of Net Investment Hedges in Accumulated Other Comprehensive Income (Loss)	The impacts on the consolidated statements of income and comprehensive income for the three and nine months ended September 30, 2021 and 2020 were as follows: Three Months Ended September 30, 2021 Recognized in Earnings Gross Gains (Loss) Recognized in Accumulated Other Comprehensive Income (Loss) Gross amount Reclassified From Accumulated Other Comprehensive Interest rate swap agreements designated as cash flow hedges $ — $ 1,023 $ (6,946) Derivative instruments not designated as hedges: Losses (Gains) recognized in interest expenses $ 143 Three Months Ended September 30, 2020 Recognized in Earnings Gross Gains (Loss) Recognized in Accumulated Other Comprehensive Income (Loss) Gross amount Reclassified From Accumulated Other Comprehensive Interest rate swap agreements designated as cash flow hedges $ — $ 256 $ (8,939) Derivative instruments not designated as hedges: Losses (Gains) recognized in interest expenses $ 567 Nine Months Ended September 30, 2021 Recognized in Earnings Gross Gains (Loss) Recognized in Accumulated Other Comprehensive Income (Loss) Gross amount Reclassified From Accumulated Other Comprehensive Interest rate swap agreements designated as cash flow hedges $ — $ 4,687 $ (22,254) Derivative instruments not designated as hedges: Losses (Gains) recognized in interest expenses $ 113 Nine Months Ended September 30, 2020 Recognized in Earnings Gross Gains (Loss) Recognized in Accumulated Other Comprehensive Income (Loss) Gross amount Reclassified From Accumulated Other Comprehensive Interest rate swap agreements designated as cash flow hedges $ — $ (59,405) $ (17,260) Derivative instruments not designated as hedges: Losses (Gains) recognized in interest expenses $ 10,774
Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss)	The impacts on the consolidated statements of income and comprehensive income for the three and nine months ended September 30, 2021 and 2020 were as follows: Three Months Ended September 30, 2021 Recognized in Earnings Gross Gains (Loss) Recognized in Accumulated Other Comprehensive Income (Loss) Gross amount Reclassified From Accumulated Other Comprehensive Interest rate swap agreements designated as cash flow hedges $ — $ 1,023 $ (6,946) Derivative instruments not designated as hedges: Losses (Gains) recognized in interest expenses $ 143 Three Months Ended September 30, 2020 Recognized in Earnings Gross Gains (Loss) Recognized in Accumulated Other Comprehensive Income (Loss) Gross amount Reclassified From Accumulated Other Comprehensive Interest rate swap agreements designated as cash flow hedges $ — $ 256 $ (8,939) Derivative instruments not designated as hedges: Losses (Gains) recognized in interest expenses $ 567 Nine Months Ended September 30, 2021 Recognized in Earnings Gross Gains (Loss) Recognized in Accumulated Other Comprehensive Income (Loss) Gross amount Reclassified From Accumulated Other Comprehensive Interest rate swap agreements designated as cash flow hedges $ — $ 4,687 $ (22,254) Derivative instruments not designated as hedges: Losses (Gains) recognized in interest expenses $ 113 Nine Months Ended September 30, 2020 Recognized in Earnings Gross Gains (Loss) Recognized in Accumulated Other Comprehensive Income (Loss) Gross amount Reclassified From Accumulated Other Comprehensive Interest rate swap agreements designated as cash flow hedges $ — $ (59,405) $ (17,260) Derivative instruments not designated as hedges: Losses (Gains) recognized in interest expenses $ 10,774

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	9 Months Ended
Fair Value of Financial Instruments (Tables)	Sep. 30, 2021
Fair Value Disclosures [Abstract]
Assets and Liabilities Measured at Fair Value on a Recurring Basis	The fo llowing tables present the Company’s assets and liabilities that are measured at fair value on a recurring basis at September 30, 2021 and December 31, 2020, and the level within the fair value hierarchy: Level 1 Level 2 Level 3 Balance at September 30, 2021 Level 1 Level 2 Level 3 Balance at December 31, 2020 Other assets: Trading interest rate caps (a) $ — $ 13,314 $ — $ 13,314 $ — $ 4,617 $ — $ 4,617 Cash flow hedging interest rate swaps (a) — — — $ — — 123 — $ 123 Available-for-sale-debt securities (b) — 90,688 — $ 90,688 — 95,654 — $ 95,654 Retail installment contracts (c)(d) — 3,774 2,396 $ 6,170 — — 5,614 $ 5,614 Other liabilities: Trading options for interest rate caps (a) — 13,314 — $ 13,314 — 4,617 — $ 4,617 Cash flow hedging interest rate swaps (a) — — — $ — — 70,589 — $ 70,589 Trading interest rate swaps (a) — 8,085 — $ 8,085 — 12,934 — $ 12,934 (a) The valuation is determined using widely accepted valuation techniques including a DCF on the expected cash flows of each derivative. This analysis reflects the contractual terms of the derivative, including the period to maturity, and uses observable market-based inputs. The Company incorporates credit valuation adjustments to appropriately reflect both its own nonperformance risk and the respective counterparty’s nonperformance risk in the fair value measurement of its derivatives. In adjusting the fair value of its derivative contracts for the effect of nonperformance risk, the Company has considered the impact of netting and any applicable credit enhancements, such as collateral postings and guarantees. The Company utilizes the exception in ASC 820-10-35-18D (commonly referred to as the “portfolio exception”) with respect to measuring counterparty credit risk for instruments (Note 9). (b) The Company's AFS debt securities includes U.S. Treasury securities that are valued utilizing observable market quotes. The Company obtains vendor trading platform data (actual prices) from a number of live data sources, including active market makers and interdealer brokers and its securities are therefore, classified as Level 2. (c) The fair values of the retail installment contracts are estimated using a DCF model and are classified as Level 3. As of September 30, 2021, the Company had used the most recent purchase price as the fair value for certain loans and hence classified those retail installment contracts as Level 2. Changes in the fair value are recorded in investment gains (losses), net in the consolidated statement of income. (d) The aggregate fair value of retail installment contracts in non-accrual status, as of September 30, 2021 and December 31, 2020, is $541 a nd $1,129, respectively.
Changes in Level 3 Balances, Assets	The following table presents the changes in retail installment contracts held for investment balances classified as Level 3 balances for the three and nine months ended September 30, 2021 and 2020: Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 Balance — beginning of year $ 2,841 $ 10,585 $ 5,614 $ 4,719 Additions / issuances 1,171 — 1,171 2,512 Transfer from level 2 (a) — — — 17,634 Net collection activities (1,616) (2,410) (4,389) (16,854) Gains recognized in earnings — 73 — 237 Balance — end of year $ 2,396 $ 8,248 $ 2,396 $ 8,248 (a) The Company transferred retail installment contracts from Level 2 to Level 3 during the three months ended March 31, 2020 because the fair value for these assets could not be determined by using readily observable inputs at March 31, 2020. There we re no other material transfers in or out of Level 3 during the three months ended September 30, 2020 and during the three and nine months ended September 30, 2021.
Assets and Liabilities Measured at Fair Value on Nonrecurring Basis	The following table presents the Company’s assets and liabilities that are measured at fair value on a nonrecurring basis at September 30, 2021 and December 31, 2020, respectively: Nine Months Ended September 30, 2021 Year Ended December 31, 2020 Total Lower of cost or fair value expense Total Lower of cost or fair value expense Other assets — vehicles (a) $ 269,627 $ — $ 311,557 $ — Personal loans held for sale (b) — — 893,479 355,136 Retail installment contracts held for sale (c) 359,561 — 674,048 $ 7,385 Auto loans impaired due to bankruptcy (d) 204,594 — 191,785 — ( a) The Company estimates the fair value of its vehicles, which are obtained either through repossession or lease termination, using historical auction rates and current market levels of used car prices. (b) The estimated fair value for personal loans held for sale is calculated based on the lower of market participant view and a DCF analysis in which the Company uses significant unobservable inputs on key assumptions. The lower of cost or fair value adjustment for personal loans held for sale includes customer default activity and adjustments related to the net change in the portfolio balance during the reporting period. On March 31, 2021, the Company sold the personal lending portfolio. Refer to Note 1 – “Description of Business, Basis of Presentation, and Accounting Principles” to these Condensed Consolidated Financial Statements for more information. (c) The estimated fair value is calculated based on a DCF analysis in which the Company uses significant unobservable inputs on key assumptions, including expected default rates, prepayment rates, recovery rates, and discount rates reflective of the cost of funds and appropriate rate of returns. (d) For loans that are considered collateral-dependent, such as certain bankruptcy loans, impairment is measured based on the fair value of the collateral, less its estimated cost to sell. For the underlying collateral, the estimated fair value is obtained using historical auction rates and current market levels of used car prices. No additional lower of cost or fair value expense was recorded for the nine months ended September 30, 2021.
Quantitative Information About Significant Unobservable Inputs for Liabilities Measured at Fair Value	The following table presents quantitative information about the significant unobservable inputs for assets and liabilities measured at fair value on a recurring and nonrecurring basis at September 30, 2021 and December 31, 2020, respective ly: Financial Instruments Fair Value at September 30, 2021 Valuation Technique Unobservable Inputs Range (weighted average) (a) Financial Assets: Retail installment contracts held for investment $ 2,396 Discounted Cash Flow Discount Rate 7%-13% (9%) Default Rate 4%-10% (7%) Prepayment Rate 4%-15% (15%) Loss Severity Rate 50%-60% (56%) Retail installment contracts held for sale $ 359,561 Discounted Cash Flow Discount Rate 1% - 2% (2%) Default Rate 4% - 10% (7%) Prepayment Rate 15% - 20% (17%) Loss Severity Rate 50% - 55% (52%) (a) Weighted average was developed by weighting the associated relative unpaid principal balances. Financial Instruments Fair Value at December 31, 2020 Valuation Technique Unobservable Inputs Range Financial Assets: Retail installment contracts held for investment $ 5,614 Discounted Cash Flow Discount Rate 7%-11% Default Rate 4%-20% Prepayment Rate 15%-25% Loss Severity Rate 50%-60% Personal loans held for sale $ 893,479 Lower of Market or Income Approach Market Approach Market Participant View 60%-70% Income Approach Discount Rate 20%-30% Default Rate 35%-45% Net Principal & Interest Payment Rate 65%-75% Loss Severity Rate 90%-95% Retail installment contracts held for sale $ 674,048 Discounted Cash Flow Discount Rate 1.5% - 2.5% Default Rate 2% - 4% Prepayment Rate 10% - 20% Loss Severity Rate 50% - 60%
Summary of Fair Value Estimates, Methods and Assumptions	The following tables present the carrying value and estimated fair value of the Company’s financial assets and liabilities disclosed, but not carried, at fair value at September 30, 2021 and December 31, 2020, and the level within the fair value hierarchy: September 30, 2021 December 31, 2020 Carrying Estimated Level 1 Level 2 Level 3 Carrying Estimated Level 1 Level 2 Level 3 Assets: Cash and cash equivalents (a) $ 2,106,405 $ 2,106,405 $ 2,106,405 $ — $ — $ 109,053 $ 109,053 $ 109,053 $ — $ — Finance receivables held for investment, net (b) 27,272,976 29,878,212 — 47,691 29,830,521 26,806,606 29,464,066 — — 29,464,066 Restricted cash (a) 2,248,667 2,248,667 2,248,667 — — 2,221,094 2,221,094 2,221,094 — — Investments in debt securities held to maturity (c) 101,815 102,449 — 102,449 — 44,841 45,606 — 45,606 — Total $ 31,729,863 $ 34,335,733 $ 4,355,072 $ 150,140 $ 29,830,521 $ 29,181,594 $ 31,839,819 $ 2,330,147 $ 45,606 $ 29,464,066 Liabilities: Notes Payable: Facilities with third parties (d) $ — $ — $ — $ — $ — $ 4,159,955 $ 4,159,955 $ — $ — $ 4,159,955 Secured structured financings (e) 28,831,858 29,089,183 — 24,644,581 4,444,602 26,177,401 26,673,970 — 18,291,898 8,382,072 Facilities with Santander and related subsidiaries (f) 9,600,000 9,798,720 — — 9,798,720 10,801,318 11,333,823 — — 11,333,823 Total $ 38,431,858 $ 38,887,903 $ — $ 24,644,581 $ 14,243,322 $ 41,138,674 $ 42,167,748 $ — $ 18,291,898 $ 23,875,850 (a) Cash and cash equivalents and restricted cash — The carrying amount of cash and cash equivalents, including restricted cash, is at an approximated fair value as the instruments mature within 90 days or less and bear interest at market rates. (b) Finance receivables held for investment, net — Finance receivables held for investment, net are carried at amortized cost, net of an allowance. These receivables exclude retail installment contracts that are measured at fair value on a recurring and nonrecurring basis. The estimated fair value for the underlying financial instruments is determined as follows: • Retail installment contracts held for investment and purchased receivables - credit deteriorated — The estimated fair value for certain finance receivables at September 30, 2021 is based on the most recent purchase price and hence has classified these amounts as Level 2. The estimated fair value of these remaining finance receivables at September 30, 2021 is estimated using a DCF model, and such receivables are classified as Level 3. • Finance lease receivables — Finance lease receivables are carried at gross investments, net of unearned income and allowance for lease losses. Management believes that the terms of these credit agreements approximate market terms for similar credit agreements. (c) Investments in debt securities held to maturity - Investments in debt securities held to maturity are recorded at amortized cost and are priced by third-party pricing vendors. The third-party vendors use a variety of methods when pricing these securities that incorporate relevant observable market data to arrive at an estimate of what a buyer in the marketplace would pay for a security under current market conditions. These investment securities are, therefore, considered Level 2. (d) Notes payable — facilities with third parties — The carrying amount of notes payable related to revolving credit facilities is estimated to approximate fair value. Management believes that the terms of these credit agreements approximate market terms for similar credit agreements as the facilities are subject to short-term floating interest rates that approximate rates available to the Company. (e) Notes payable — secured structured financings — The estimated fair value of notes payable related to secured structured financings is calculated based on market observable prices and spreads for the Company’s publicly traded debt and market observed prices of similar notes issued by the Company, or recent market transactions involving similar debt with similar credit risks, which are considered Level 2 inputs. The estimated fair value of notes payable related to privately issued amortizing notes is calculated based on a combination of credit enhancement review, discounted cash flow analysis and review of market observable spreads for similar liabilities. In conducting this analysis, the Company uses significant unobservable inputs on key assumptions, which are considered Level 3 inputs. (f) Notes payable — facilities with Santander and related subsidiaries — The carrying amount of floating rate notes payable to a related party is estimated to approximate fair value as the facilities are subject to short-term floating interest rates that approximate rates available to the Company. The fair value premium/discount of the fixed rate promissory notes are derived from changes in the Company’s unsecured cost of funds since the time of issuance and weighted average life of these notes.

Investment Gains (Losses), Net

Investment Gains (Losses), Net (Tables)	9 Months Ended
Investment Gains (Losses), Net (Tables)	Sep. 30, 2021
Investments, Debt and Equity Securities [Abstract]
Schedule of Investment Gains (Losses), Net	Investment gains (losses), net was comprised of the following for the three and nine months ended September 30, 2021 and 2020: Three Months Ended Nine Months Ended September 30, 2021 September 30, 2020 September 30, 2021 September 30, 2020 Gain (loss) on sale of loans and leases $ 2,003 $ (13,669) $ 19,412 $ (40,553) Lower of cost or market adjustments — (56,598) (31,848) (241,198) Other gains, net 3,238 1,278 5,379 1,754 $ 5,241 $ (68,989) $ (7,057) $ (279,997)

Computation of Basic and Dilu_2

Computation of Basic and Diluted Earnings per Common Share (Tables)	9 Months Ended
	Sep. 30, 2021
Earnings Per Share [Abstract]
Summary of Computation of Basic and Diluted Earnings per Common Share	The following table represents EPS numbers for the three and nine months ended September 30, 2021 and 2020: Three Months Ended Nine Months Ended 2021 2020 2021 2020 Earnings per common share Net income (loss) $ 763,324 $ 490,115 $ 2,563,181 $ 389,450 Weighted average number of common shares outstanding (in thousands) 306,093 310,150 306,086 321,276 Earnings per common share $ 2.49 $ 1.58 $ 8.37 $ 1.21 Earnings per common share - assuming dilution Net income (loss) $ 763,324 $ 490,115 $ 2,563,181 $ 389,450 Weighted average number of common shares outstanding (in thousands) 306,093 310,150 306,086 321,276 Effect of employee stock-based awards (in thousands) 286 157 268 216 Weighted average number of common shares outstanding - assuming dilution (in thousands) 306,379 310,307 306,354 321,492 Earnings per common share - assuming dilution $ 2.49 $ 1.58 $ 8.37 $ 1.21

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
Commitments and Contingencies (Tables)	Sep. 30, 2021
Commitments and Contingencies Disclosure [Abstract]
Summary of Liabilities for Commitments and Contingencies	The following table summarizes liabilities recorded for commitments and contingencies as of September 30, 2021 and December 31, 2020, all of which are included in accounts payable and accrued expenses in the accompanying consolidated balance sheets: Agreement or Legal Matter Commitment or Contingency September 30, 2021 December 31, 2020 MPLFA Revenue-sharing and gain/(loss), net-sharing payments $ 70,675 $ 43,778 Agreement with Bank of America Servicer performance fee 462 1,200 Agreement with CBP Loss-sharing payments 286 181 Other Contingencies Consumer arrangements 29,070 22,155 Legal and regulatory proceedings Aggregate legal and regulatory liabilities 6,348 31,936 Total commitments and contingencies $ 106,841 $ 99,250

Related-Party Transactions (Tab

Related-Party Transactions (Tables)	9 Months Ended
Related-Party Transactions (Tables)	Sep. 30, 2021
Related Party Transactions [Abstract]
Schedule of Related Party Transactions	Other information on the serviced auto loan and retail installment contract portfolios for SBNA as of September 30, 2021 and December 31, 2020 is as follows: September 30, 2021 December 31, 2020 Total serviced portfolio $ 135,532 $ 190,504 Cash collections due to owner 24,395 19,650 Servicing fees receivable 4,194 1,769 Other information related to the above transactions with SBNA is as follows: Three Months Ended Nine Months Ended September 30, 2021 September 30, 2020 September 30, 2021 September 30, 2020 Origination and renewal fee income from SBNA $ — $ 451 $ — $ 2,473 Servicing fees expenses charged by SBNA 33 (9) 193 63 31, 2020 is as follows: September 30, 2021 December 31, 2020 Total serviced portfolio $ 243,531 $ — Origination and servicing fees receivable 342 — Revenue share reimbursement receivable 48 —

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	9 Months Ended
Employee Benefit Plans (Tables)	Sep. 30, 2021
Share-based Payment Arrangement [Abstract]
Summary of Stock Options and Related Activity	A summary of the Company’s stock options and related activity as of and for the nine months ended September 30, 2021 is as follows: Shares Weighted Weighted Aggregate Options outstanding at January 1, 2021 169,369 $ 13.01 1.9 $ 1,543 Granted — — — — Exercised (77,885) 10.08 — 1,650 Expired — — — — Forfeited — — — — Other (a) — — — — Options outstanding at September 30, 2021 91,484 15.51 1.8 2,396 Options exercisable at September 30, 2021 91,484 $ 15.51 1.8 $ 2,396 Options expected to vest at September 30, 2021 — $ — 0 $ — (a) Represents stock options that were reinstated.
Schedule of Nonvested Restricted Stock Units and Performance Stock Units Activity	A summary of the Company’s Restricted Stock Units and performance stock units and related activity as of and for the nine months ended September 30, 2021 is as follows: Shares Weighted Weighted Aggregate Outstanding as of January 1, 2021 367,012 $ 19.78 0.8 $ 8,082 Granted 438,435 27.71 — — Vested (401,549) 23.04 — 10,847 Forfeited/canceled (7,549) 14.67 — — Non-vested at September 30, 2021 396,349 $ 25.10 1.1 $ 16,528

Description of Business, Basi_3

Description of Business, Basis of Presentation, and Accounting Policies - Additional Information (Details)	9 Months Ended
	Sep. 30, 2021segment	Aug. 31, 2021$ / shares
Basis Of Presentation And Significant Accounting Policies [Line Items]
Number of reportable segments \| segment	1
Private Placement \| Noncontrolling Shareholders
Basis Of Presentation And Significant Accounting Policies [Line Items]
Sale of stock, price per share (in dollars per share) \| $ / shares		$ 41.50
SHUSA
Basis Of Presentation And Significant Accounting Policies [Line Items]
Ownership percentage held in the Company	80.20%
Public Shareholders
Basis Of Presentation And Significant Accounting Policies [Line Items]
Ownership percentage held in the Company	19.80%

Finance Receivables - Held for

Finance Receivables - Held for Investment (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables held for investment, net	$ 27,483,741	$ 27,004,005
Recurring
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans at fair value	6,170	5,614
Purchased receivables - credit deteriorated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables held for investment, net	1,440	6,197
Consumer Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables held for investment, net	27,461,064	26,975,368
Consumer Portfolio Segment \| Recurring
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans at fair value	6,170	5,614
Finance Leases Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance lease receivables	$ 21,237	$ 22,440

Finance Receivables - Compositi

Finance Receivables - Composition of Held for Investment Portfolio (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
ACL	$ (5,699,698)	$ (6,110,633)
Finance receivables held for investment, at amortized cost, net	27,483,741	27,004,005
Consumer Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables held for investment, at amortized cost, net	27,461,064	26,975,368
Consumer Portfolio Segment \| Non-TDR
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance	28,779,433	28,977,299
ACL	(4,398,303)	(4,792,464)
Discount/(premium) (net of subvention and participation)	326,675	66,373
Capitalized origination costs and fees	98,549	97,638
Finance receivables held for investment, at amortized cost, net	$ 24,806,354	$ 24,348,846
ACL as a percentage of unpaid principal balance	15.30%	16.50%
ACL and discount as a percentage of unpaid principal balance	14.10%	16.30%
Consumer Portfolio Segment \| TDR
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance	$ 3,952,344	$ 3,945,040
ACL	(1,297,841)	(1,314,170)
Discount/(premium) (net of subvention and participation)	(3,601)	(8,389)
Capitalized origination costs and fees	3,808	4,041
Finance receivables held for investment, at amortized cost, net	$ 2,654,710	$ 2,626,522
ACL as a percentage of unpaid principal balance	32.80%	33.30%
ACL and discount as a percentage of unpaid principal balance	32.90%	33.50%

Finance Receivables - Additiona

Finance Receivables - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Schedule Of Financing Receivables [Line Items]
Purchase of portfolios of finance receivables held for investment			$ 13,816,075,000	$ 12,782,253,000
Loans classified as non-performing, period for classification (in days)			60 days
Loans Acquired Individually
Schedule Of Financing Receivables [Line Items]
Unpaid principal balance	$ 112,061,000	$ 0	$ 112,061,000	0
Purchase of portfolios of finance receivables held for investment	67,018,000	0	67,018,000	0
Chrysler Capital Loans
Schedule Of Financing Receivables [Line Items]
Purchase of portfolios of finance receivables held for investment			$ 11,125,634,000	$ 11,145,890,000
Chrysler Capital Loans \| Credit Concentration Risk \| Accounts Receivable
Schedule Of Financing Receivables [Line Items]
Concentration risk percentage			53.00%	61.00%
Consumer Portfolio Segment \| Nonperforming Financial Instruments
Schedule Of Financing Receivables [Line Items]
Financing receivable, purchased with credit deterioration, amount at par value	42,264,000	$ 0	$ 42,264,000	$ 76,878,000
Loans classified as non-performing, period for classification (in days)			60 days
Consumer Portfolio Segment \| Geographic Concentration Risk \| Borrower Location \| Texas
Schedule Of Financing Receivables [Line Items]
Concentration risk percentage			17.00%
Consumer Portfolio Segment \| Geographic Concentration Risk \| Borrower Location \| Florida
Schedule Of Financing Receivables [Line Items]
Concentration risk percentage			11.00%
Consumer Portfolio Segment \| Geographic Concentration Risk \| Borrower Location \| California
Schedule Of Financing Receivables [Line Items]
Concentration risk percentage			8.00%
Consumer Portfolio Segment \| Geographic Concentration Risk \| Borrower Location \| Georgia
Schedule Of Financing Receivables [Line Items]
Concentration risk percentage			5.00%
Consumer Portfolio Segment \| Geographic Concentration Risk \| Borrower Location \| Other States (less than 5%)
Schedule Of Financing Receivables [Line Items]
Concentration risk percentage			5.00%
Consumer Portfolio Segment \| Commercial Fleet Contracts
Schedule Of Financing Receivables [Line Items]
Unpaid principal balance	$ 973,205,000		$ 973,205,000		$ 864,680,000

Finance Receivables - Schedule

Finance Receivables - Schedule of Carrying Values of Finance Receivables Held for Sale (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivable held for sale	$ 359,561	$ 1,567,527
Consumer Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivable held for sale	359,561	674,048
Consumer Portfolio Segment \| Personal Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivable held for sale	$ 0	$ 893,479

Finance Receivables - Schedul_2

Finance Receivables - Schedule of Sales of Retail Installment Contracts and Charged-off Assets (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Proceeds from sales of charged-off assets to third parties	$ 0	$ 9,144	$ 13,901	$ 30,019
Consumer Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Principal amount sold on loans securitized	277,898	636,301	2,968,467	1,148,587
Consumer Portfolio Segment \| Personal Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Principal amount sold on loans securitized	$ 0	$ 0	$ 1,253,746	$ 0

Allowance for Credit Loss and_3

Allowance for Credit Loss and Credit Quality - Activity in Loan Loss Allowance (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance — beginning of period			$ 6,110,633
Credit loss expense/(benefit)	$ 42,058	$ 340,548	(85,484)	$ 2,110,331
Balance — end of period	5,699,698		5,699,698
Non-TDR \| Consumer Portfolio Segment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance — beginning of period	4,299,670	4,818,187	4,792,464	2,123,878
Credit loss expense/(benefit)	188,195	24,841	(252,963)	1,526,545
Charge-offs	(427,659)	(334,938)	(1,356,482)	(1,955,706)
Recoveries	338,097	392,042	1,215,284	1,174,942
Balance — end of period	4,398,303	4,900,132	4,398,303	4,900,132
Non-TDR \| Cumulative Effect, Period of Adoption, Adjustment \| Consumer Portfolio Segment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance — beginning of period			0	2,030,473
TDR \| Consumer Portfolio Segment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance — beginning of period	1,514,994	1,037,628	1,314,170	914,718
Credit loss expense/(benefit)	(144,772)	314,075	169,268	581,344
Charge-offs	(206,111)	(200,352)	(599,083)	(617,536)
Recoveries	133,730	97,171	413,486	298,163
Balance — end of period	$ 1,297,841	$ 1,248,522	1,297,841	1,248,522
TDR \| Cumulative Effect, Period of Adoption, Adjustment \| Consumer Portfolio Segment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance — beginning of period			$ 0	$ 71,833

Allowance for Credit Loss and_4

Allowance for Credit Loss and Credit Quality - RICs and Delinquencies, Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Financing receivable, allowance for credit loss, period increase (decrease)	$ (119,000)	$ (410,000)
Financing receivable, nonperforming loans, period for classification (in days)		60 days
Commercial Portfolio Segment
Financing Receivable, Past Due [Line Items]
Financing receivable, nonperforming loans, period for classification (in days)		90 days
Consumer Portfolio Segment
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, 90 days past due and still accruing			$ 78,880

Allowance for Credit Loss and_5

Allowance for Credit Loss and Credit Quality - Summary of Delinquencies (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Total	$ 33,183,439	$ 33,114,638
Accrued interest receivable	323,469	415,765
Financial Asset Originated and Financial Asset Acquired with Credit Deterioration
Financing Receivable, Past Due [Line Items]
Accrued interest receivable	63,205	73,794
Consumer Portfolio Segment
Financing Receivable, Past Due [Line Items]
Total	33,157,000	33,082,000
Accrued interest receivable	323,000	416,000
Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Total	$ 3,361,381	$ 3,011,763
Total delinquent principal, percent	10.10%	9.10%
Financial Asset, Past Due \| Purchased Receivables Portfolios - credit deteriorated
Financing Receivable, Past Due [Line Items]
Total	$ 801	$ 1,128
Financial Asset, Past Due \| Consumer Portfolio Segment
Financing Receivable, Past Due [Line Items]
Total	3,360,580	3,010,635
30-59 days past due
Financing Receivable, Past Due [Line Items]
Total	$ 2,254,308	$ 1,972,453
Total delinquent principal, percent	6.80%	6.00%
30-59 days past due \| Purchased Receivables Portfolios - credit deteriorated
Financing Receivable, Past Due [Line Items]
Total	$ 401	$ 687
30-59 days past due \| Consumer Portfolio Segment
Financing Receivable, Past Due [Line Items]
Total	2,253,907	1,971,766
Over 59 days
Financing Receivable, Past Due [Line Items]
Total	$ 1,107,073	$ 1,039,310
Total delinquent principal, percent	3.30%	3.10%
Over 59 days \| Purchased Receivables Portfolios - credit deteriorated
Financing Receivable, Past Due [Line Items]
Total	$ 400	$ 441
Over 59 days \| Consumer Portfolio Segment
Financing Receivable, Past Due [Line Items]
Total	$ 1,106,673	$ 1,038,869

Allowance for Credit Loss and_6

Allowance for Credit Loss and Credit Quality - Retail Installment Contracts Held for Investment on Nonaccrual Status (Details) - Consumer Portfolio Segment - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Troubled Debt Restructuring [Line Items]
Non-accrual loans	$ 1,210,126	$ 1,133,047
Non-accrual loans with no allowance	204,595	191,785
Interest income recognized on nonaccrual loans (YTD)	$ 73,021	$ 108,546
Non-accrual loans as a percent of total amortized cost	3.70%	3.50%
Non-TDR
Financing Receivable, Troubled Debt Restructuring [Line Items]
Non-accrual loans	$ 818,292	$ 748,026
Non-accrual loans with no allowance	157,314	145,287
Interest income recognized on nonaccrual loans (YTD)	$ 46,445	$ 72,926
Non-accrual loans as a percent of total amortized cost	2.50%	2.30%
TDR
Financing Receivable, Troubled Debt Restructuring [Line Items]
Non-accrual loans	$ 391,834	$ 385,021
Non-accrual loans with no allowance	47,281	46,498
Interest income recognized on nonaccrual loans (YTD)	$ 26,576	$ 35,620
Non-accrual loans as a percent of total amortized cost	1.20%	1.20%

Allowance for Credit Loss and_7

Allowance for Credit Loss and Credit Quality - Credit Risk Profile (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable Recorded Investment [Line Items]
Total	$ 33,183,439	$ 33,114,638
Accrued interest receivable	323,469	415,765
Consumer Portfolio Segment
Financing Receivable Recorded Investment [Line Items]
2021	12,713,000
2020	9,003,000	14,617,000
2019	5,751,000	8,775,000
2018	3,210,000	4,979,000
2017	1,314,000	2,228,000
2016	725,000	1,363,000
Prior/2015	441,000	828,000
Prior		292,000
Total	$ 33,157,000	$ 33,082,000
Total %	100.00%	100.00%
Accrued interest receivable	$ 323,000	$ 416,000
No FICO \| Consumer Portfolio Segment
Financing Receivable Recorded Investment [Line Items]
2021	1,603,000
2020	1,173,000	1,760,000
2019	738,000	1,151,000
2018	337,000	530,000
2017	266,000	501,000
2016	112,000	247,000
Prior/2015	50,000	128,000
Prior		26,000
Total	$ 4,279,000	$ 4,343,000
Total %	12.90%	13.10%
FICO Band Less than 540 \| Consumer Portfolio Segment
Financing Receivable Recorded Investment [Line Items]
2021	$ 1,573,000
2020	1,306,000	$ 1,789,000
2019	948,000	1,370,000
2018	608,000	913,000
2017	283,000	454,000
2016	151,000	263,000
Prior/2015	125,000	186,000
Prior		90,000
Total	$ 4,994,000	$ 5,065,000
Total %	15.10%	15.30%
FICO Band 540-599 \| Consumer Portfolio Segment
Financing Receivable Recorded Investment [Line Items]
2021	$ 4,364,000
2020	3,038,000	$ 4,269,000
2019	2,030,000	3,005,000
2018	1,134,000	1,736,000
2017	413,000	673,000
2016	234,000	423,000
Prior/2015	156,000	264,000
Prior		96,000
Total	$ 11,369,000	$ 10,466,000
Total %	34.30%	31.70%
FICO Band 600-639 \| Consumer Portfolio Segment
Financing Receivable Recorded Investment [Line Items]
2021	$ 2,828,000
2020	1,831,000	$ 2,759,000
2019	1,182,000	1,838,000
2018	625,000	990,000
2017	201,000	335,000
2016	123,000	230,000
Prior/2015	65,000	126,000
Prior		47,000
Total	$ 6,855,000	$ 6,325,000
Total %	20.70%	19.10%
FICO Band Greater than 640 \| Consumer Portfolio Segment
Financing Receivable Recorded Investment [Line Items]
2021	$ 2,345,000
2020	1,655,000	$ 4,040,000
2019	853,000	1,411,000
2018	506,000	810,000
2017	151,000	265,000
2016	105,000	200,000
Prior/2015	45,000	124,000
Prior		33,000
Total	$ 5,660,000	$ 6,883,000
Total %	17.00%	20.80%

Allowance for Credit Loss and_8

Allowance for Credit Loss and Credit Quality - Troubled Debt Restructurings, Narrative (Details) - USD ($)	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Commercial Portfolio Segment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDR principal	$ 0	$ 0
Consumer Portfolio Segment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDR principal	$ 3,980,920,000	$ 4,011,780,000
Trouble debt restructuring, number of days past due considered subsequently defaulted	120 days

Allowance for Credit Loss and_9

Allowance for Credit Loss and Credit Quality - Summary of TDRs (Details) - Consumer Portfolio Segment - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Troubled Debt Restructuring [Line Items]
Outstanding recorded investment	$ 3,980,920	$ 4,011,780
Impairment	(1,297,841)	(1,314,170)
Amortized cost including accrued interest, net of impairment	2,683,079	2,697,610
Collateral Dependent
Financing Receivable, Troubled Debt Restructuring [Line Items]
Outstanding recorded investment	56,200	67,900
TDR write down	$ 8,900	$ 21,400

Allowance for Credit Loss an_10

Allowance for Credit Loss and Credit Quality - Delinquent TDRs (Details) - Consumer Portfolio Segment - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Troubled Debt Restructuring Debtor Current Period [Line Items]
Total TDR principal	$ 3,980,920	$ 4,011,780
Equal to or greater than 30 days past due
Troubled Debt Restructuring Debtor Current Period [Line Items]
Total TDR principal	1,126,477	982,336
30-59 days past due
Troubled Debt Restructuring Debtor Current Period [Line Items]
Total TDR principal	744,637	637,560
Over 59 days
Troubled Debt Restructuring Debtor Current Period [Line Items]
Total TDR principal	$ 381,840	$ 344,776

Allowance for Credit Loss an_11

Allowance for Credit Loss and Credit Quality - Average Recorded Investment and Income Recognized on TDR Loans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Financing Receivable, Troubled Debt Restructuring [Line Items]
Interest income recognized	$ 1,215,121	$ 1,300,694	$ 3,749,264	$ 3,811,113
Consumer Portfolio Segment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Average amortized cost (including accrued interest)	4,142,089	3,960,119	4,203,685	3,802,823
Consumer Portfolio Segment \| TDR
Financing Receivable, Troubled Debt Restructuring [Line Items]
Interest income recognized	$ 212,073	$ 165,637	$ 635,188	$ 457,642

Allowance for Credit Loss an_12

Allowance for Credit Loss and Credit Quality - Financial Effects of TDRs (Details) - Consumer Portfolio Segment $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021USD ($)contract	Sep. 30, 2020USD ($)contract	Sep. 30, 2021USD ($)contract	Sep. 30, 2020USD ($)contract
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost (including accrued interest) before TDR	$ 219,898	$ 317,455	$ 1,326,077	$ 1,399,813
Amortized cost (including accrued interest) after TDR (a)	$ 220,679	$ 319,027	$ 1,333,257	$ 1,417,480
Number of contracts \| contract	12,063	14,620	67,354	69,786

Allowance for Credit Loss an_13

Allowance for Credit Loss and Credit Quality - Defaults in Loan Modifications Accounted for as TDRs (Details) - Consumer Portfolio Segment $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021USD ($)contract	Sep. 30, 2020USD ($)contract	Sep. 30, 2021USD ($)contract	Sep. 30, 2020USD ($)contract
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost (including accrued interest) in TDRs that subsequently defaulted \| $	$ 91,260	$ 83,002	$ 283,914	$ 183,871
Number of contracts \| contract	4,724	4,379	14,496	10,467

Leases (SC as Lessor) - Summary

Leases (SC as Lessor) - Summary of Leased Vehicles (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Leases [Abstract]
Leased vehicles	$ 20,032,832	$ 22,056,063
Less: accumulated depreciation	(3,920,416)	(4,796,595)
Depreciated net capitalized cost	16,112,416	17,259,468
Manufacturer subvention payments, net of accretion	(700,783)	(934,381)
Origination fees and other costs	117,977	66,020
Net book value	$ 15,529,610	$ 16,391,107

Leases (SC as Lessor) - Future

Leases (SC as Lessor) - Future Minimum Rental Payments Due to Lessor under Operating Leases (Details) $ in Thousands	Sep. 30, 2021USD ($)
Leases [Abstract]
Remainder of 2021	$ 910,739
2022	2,101,818
2023	1,363,807
2024	286,598
2025	25,093
Thereafter	1,295
Total	$ 4,689,350

Leases (SC as Lessor) - Summa_2

Leases (SC as Lessor) - Summary of Finance Lease Receivables (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Leases [Abstract]
Gross investment in finance leases	$ 33,498	$ 34,461
Origination fees and other	283	289
Less: unearned income	(8,990)	(8,311)
Net investment in finance leases before allowance	24,791	26,439
Less: allowance for lease losses	(3,554)	(3,999)
Net investment in finance leases	$ 21,237	$ 22,440

Leases (SC as Lessor) - Futur_2

Leases (SC as Lessor) - Future Minimum Rental Receivable under Finance Leases (Details) $ in Thousands	Sep. 30, 2021USD ($)
Leases [Abstract]
Remainder of 2021	$ 2,688
2022	10,275
2023	8,547
2024	6,509
2025	4,054
Thereafter	1,425
Total	$ 33,498

Other Assets - Summary (Details

Other Assets - Summary (Details) - USD ($) $ in Thousands	1 Months Ended
Other Assets - Summary (Details) - USD ($) $ in Thousands	Jun. 30, 2019	May 31, 2013	Sep. 30, 2021	Dec. 31, 2020
Derivative [Line Items]
Vehicles			$ 269,627	$ 311,557
Manufacturer subvention payments receivable			29,361	57,996
Upfront fee			47,015	69,286
Derivative - collateral			23,037	92,132
Operating leases (Right-of-use-assets)			61,590	46,441
Available-for-sale debt securities			90,688	95,654
Held-to-maturity debt securities			101,874	44,875
Equity securities not held for trading			2,671	1,380
Prepaids			35,152	45,667
Accounts receivable			28,737	34,607
Federal and State tax receivable			76,113	99,666
Other			32,418	68,725
Other assets			811,597	972,726
Upfront fee	$ 60,000	$ 150,000
Finance and other interest income amortization period		10 years
Third Party
Derivative [Line Items]
Derivative assets (third party) at fair value			$ 13,314	$ 4,740

Other Assets - Operating Leases

Other Assets - Operating Leases, Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Other assets - $6,956 and $14,451 held at affiliates, respectively		Other assets - $6,956 and $14,451 held at affiliates, respectively
Operating Lease, Liability, Statement of Financial Position [Extensible List]	Other liabilities - $2,368 and $463 held at affiliates, respectively		Other liabilities - $2,368 and $463 held at affiliates, respectively
Lease expense	$ 3,084	$ 3,479	$ 9,577	$ 10,586
Operating cash flows from operating leases			12,863	$ 12,947
Equity securities not held for trading	$ 2,671		$ 2,671		$ 1,380
Minimum
Lessee, Lease, Description [Line Items]
Lease renewal term (in years)	1 year		1 year
Maximum
Lessee, Lease, Description [Line Items]
Lease renewal term (in years)	15 years		15 years

Other Assets - Supplemental Inf

Other Assets - Supplemental Information Related to Operating Leases (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Other Assets, Leases And Investments [Abstract]
Operating leases-right of use assets	$ 61,590	$ 46,441
Other liabilities	$ 77,854	$ 64,927
Weighted average lease term (in years)	6 years 2 months 12 days	5 years 6 months
Weighted average discount rate	2.70%	3.40%

Other Assets - Maturity of Oper

Other Assets - Maturity of Operating Lease Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Other Assets, Leases And Investments [Abstract]
2021	$ 4,078
2022	17,409
2023	14,343
2024	14,313
2025	14,397
Thereafter	18,029
Total	82,569
Less: Interest	(4,715)
Present value of lease liabilities	$ 77,854	$ 64,927

Other Assets - Amortized Cost,

Other Assets - Amortized Cost, Gross Unrealized Gains and Losses and Fair Values of AFS and HTM Debt Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Available-for-sale debt securities (US Treasury securities)
Amortized cost (before unrealized gains / losses)	$ 89,437
Gross Unrealized gain	1,251
Gross Unrealized loss	0
Fair value	90,688	$ 95,654
Held-to-maturity debt securities (Asset-Backed Notes)
Total	101,815
Gross Unrealized gain	634
Gross Unrealized loss	0
Fair value	$ 102,449

Other Assets - Contractual Matu

Other Assets - Contractual Maturities of AFS and HTM Debt Securities (Details) $ in Thousands	Sep. 30, 2021USD ($)
Amortized cost
Due within one year	$ 66,924
Due after one year but within 5 years	22,513
Due after 5 year but within 10 years	0
Total	89,437
Fair value
Due within one year	67,650
Due after one year but within 5 years	23,038
Due after 5 year but within 10 years	0
Total	90,688
Amortized cost
Due within one year	0
Due after one year but within 5 years	48,200
Due after 5 year but within 10 years	53,615
Total	101,815
Fair value
Due within one year	0
Due after one year but within 5 years	48,491
Due after 5 year but within 10 years	53,958
Total	$ 102,449

Variable Interest Entities - On

Variable Interest Entities - On-balance Sheet Variable Interest Entities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020
Assets
Restricted cash	$ 2,248,667	$ 2,221,094	$ 2,267,154
Finance receivables held for sale, net	359,561	1,567,527
Finance receivables held for investment, net	27,483,741	27,004,005
Leased vehicles, net	15,529,610	16,391,107
Various other assets	811,597	972,726
TOTAL ASSETS	49,074,450	48,887,493
Liabilities
Notes payable	38,431,858	41,138,674
Various other liabilities	299,422	331,693
TOTAL LIABILITIES	41,141,720	43,265,532
Variable Interest Entity, Primary Beneficiary
Assets
Restricted cash	1,682,654	1,737,021
Finance receivables held for sale, net	113,313	581,938
Finance receivables held for investment, net	21,785,308	22,572,549
Leased vehicles, net	15,529,610	16,391,107
Various other assets	706,130	791,306
TOTAL ASSETS	39,817,015	42,073,921
Liabilities
Notes payable	30,632,558	31,700,709
Various other liabilities	107,743	84,922
TOTAL LIABILITIES	$ 30,740,301	$ 31,785,631

Variable Interest Entities - Ad

Variable Interest Entities - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Variable Interest Entity, Primary Beneficiary
Securitization Financial Asset For Which Transfer Is Accounted As Sale [Line Items]
Gross retail installment contracts transferred and serviced	$ 26,079,950,000		$ 26,079,950,000		$ 27,658,182,000
Receivables securitized	7,095,782,000	$ 5,282,901,000	18,457,441,000	$ 15,845,707,000
VIE, Not Primary Beneficiary
Securitization Financial Asset For Which Transfer Is Accounted As Sale [Line Items]
Gross retail installment contracts transferred and serviced	2,754,314,000		2,754,314,000		$ 2,226,786,000
Receivables securitized	0	$ 636,301,000	1,891,278,000	1,148,587,000
Off-balance securitizations gain (loss)			7,233,000	$ (40,553,000)
Cash proceeds received for assets derecognized	$ 0		$ 0

Variable Interest Entities - Su

Variable Interest Entities - Summary of Cash Flows Received from Securitization Trusts (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Receivables securitized	$ 7,095,782	$ 5,282,901	$ 18,457,441	$ 15,845,707
Net proceeds from new securitizations	6,591,786	4,662,211	16,168,394	11,470,857
Net proceeds from retained bonds	0	1,293	195,967	57,286
Cash received for servicing fees	228,194	242,245	686,789	735,533
Net distributions from Trusts	1,391,970	1,173,276	4,435,605	2,730,657
Total cash received from Trusts	8,211,950	6,079,025	21,486,755	14,994,333
VIE, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Receivables securitized	0	636,301	1,891,278	1,148,587
Net proceeds from new securitizations	0	592,455	1,779,532	1,052,541
Cash received for servicing fees	8,041	6,598	24,061	17,856
Total cash received from Trusts	$ 8,041	$ 599,053	$ 1,803,593	$ 1,070,397

Variable Interest Entities - Of

Variable Interest Entities - Off-balance Sheet Variable Interest Entities Portfolio (Details) - VIE, Not Primary Beneficiary - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Variable Interest Entity [Line Items]
Total serviced	$ 2,754,314	$ 2,226,786
Third party SCART serviced securitizations
Variable Interest Entity [Line Items]
Total serviced	2,067,156	929,429
Third party CCAP serviced securitizations
Variable Interest Entity [Line Items]
Total serviced	0	82,713
Santander
Variable Interest Entity [Line Items]
Total serviced	$ 687,158	$ 1,214,644

Debt - Total Borrowings and Oth

Debt - Total Borrowings and Other Debt Obligations (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Total borrowings and other debt obligations	$ 38,431,858	$ 41,138,674
Secured Structured Financings
Debt Instrument [Line Items]
Notes Payable — Secured Structured Financings	28,831,858	26,177,401
Secured Structured Financings \| Parent
Debt Instrument [Line Items]
Notes Payable — Secured Structured Financings	28,831,858	26,177,401
Facilities with third parties
Debt Instrument [Line Items]
Notes payable	0	4,159,955
Facilities with Santander and related subsidiaries
Debt Instrument [Line Items]
Notes payable	9,600,000	10,800,000
Notes Payable - Facilities with Santander and Related Subsidiaries	$ 9,600,000	$ 10,801,318

Debt - Schedule of Credit Facil

Debt - Schedule of Credit Facilities (Details) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Total revolving credit facilities
Line of Credit Facility [Line Items]
Utilized Balance	$ 9,600,000,000	$ 14,959,955,000
Committed Amount	24,350,000,000	25,717,967,000
Assets Pledged	1,814,935,000	7,063,398,000
Restricted Cash Pledged	565,000	2,886,000
Facilities with third parties
Line of Credit Facility [Line Items]
Utilized Balance	0	4,159,955,000
Committed Amount	11,750,000,000	11,917,967,000
Assets Pledged	1,814,935,000	7,063,398,000
Restricted Cash Pledged	565,000	2,886,000
Warehouse line, due June 2023
Line of Credit Facility [Line Items]
Utilized Balance	0
Committed Amount	$ 500,000,000
Effective Rate	0.00%
Assets Pledged	$ 367,404,000
Restricted Cash Pledged	0
Warehouse line, due August 2022
Line of Credit Facility [Line Items]
Utilized Balance		0
Committed Amount		$ 500,000,000
Effective Rate		1.50%
Assets Pledged		$ 159,348,000
Restricted Cash Pledged		0
Warehouse line, due March 2023
Line of Credit Facility [Line Items]
Utilized Balance	0
Committed Amount	$ 1,250,000,000
Effective Rate	0.00%
Assets Pledged	$ 246,480,000
Restricted Cash Pledged	1,000
Warehouse line, due March 2022
Line of Credit Facility [Line Items]
Utilized Balance		942,845,000
Committed Amount		$ 1,250,000,000
Effective Rate		1.34%
Assets Pledged		$ 1,621,206,000
Restricted Cash Pledged		1,000
Warehouse line, due October 2022
Line of Credit Facility [Line Items]
Utilized Balance	0	1,000,600,000
Committed Amount	$ 1,500,000,000	$ 1,500,000,000
Effective Rate	0.00%	1.85%
Assets Pledged	$ 121,046,000	$ 639,875,000
Restricted Cash Pledged	0	0
Warehouse line, due October 2022
Line of Credit Facility [Line Items]
Utilized Balance	0	441,143,000
Committed Amount	$ 3,500,000,000	$ 3,500,000,000
Effective Rate	0.00%	3.45%
Assets Pledged	$ 133,429,000	$ 2,057,758,000
Restricted Cash Pledged	0	0
Warehouse line, due October 2022
Line of Credit Facility [Line Items]
Utilized Balance	0	168,300,000
Committed Amount	$ 500,000,000	$ 500,000,000
Effective Rate	0.00%	3.07%
Assets Pledged	$ 13,409,000	$ 243,649,000
Restricted Cash Pledged	500,000	1,201,000
Warehouse line, due October 2022
Line of Credit Facility [Line Items]
Utilized Balance	0	845,800,000
Committed Amount	$ 2,100,000,000	$ 2,100,000,000
Effective Rate	0.00%	3.29%
Assets Pledged	$ 175,624,000	$ 1,156,885,000
Restricted Cash Pledged	64,000	0
Warehouse line, due January 2023
Line of Credit Facility [Line Items]
Utilized Balance	0
Committed Amount	$ 1,000,000,000
Effective Rate	0.00%
Assets Pledged	$ 477,840,000
Restricted Cash Pledged	0
Warehouse line, due January 2022
Line of Credit Facility [Line Items]
Utilized Balance		415,700,000
Committed Amount		$ 1,000,000,000
Effective Rate		1.81%
Assets Pledged		$ 595,518,000
Restricted Cash Pledged		0
Warehouse line, due November 2022
Line of Credit Facility [Line Items]
Utilized Balance	0	177,600,000
Committed Amount	$ 500,000,000	$ 500,000,000
Effective Rate	0.00%	1.18%
Assets Pledged	$ 279,703,000	$ 371,959,000
Restricted Cash Pledged	0	0
Warehouse line, due July 2022
Line of Credit Facility [Line Items]
Utilized Balance	0	0
Committed Amount	$ 900,000,000	$ 900,000,000
Effective Rate	0.00%	1.46%
Assets Pledged	$ 0	$ 0
Restricted Cash Pledged	0	1,684,000
Repurchase facility, due January 2021
Line of Credit Facility [Line Items]
Utilized Balance		167,967,000
Committed Amount		$ 167,967,000
Effective Rate		1.64%
Assets Pledged		$ 217,200,000
Restricted Cash Pledged		0
Facilities with Santander and related subsidiaries
Line of Credit Facility [Line Items]
Utilized Balance	9,600,000,000	10,800,000,000
Committed Amount	12,600,000,000	13,800,000,000
Assets Pledged	0	0
Restricted Cash Pledged	0	0
Fair value hedge adjustment	0	1,300,000
Promissory Note, due December 2021
Line of Credit Facility [Line Items]
Utilized Balance	250,000,000	250,000,000
Committed Amount	$ 250,000,000	$ 250,000,000
Effective Rate	3.58%	3.70%
Assets Pledged	$ 0	$ 0
Restricted Cash Pledged	0	0
Promissory Note, due December 2022
Line of Credit Facility [Line Items]
Utilized Balance	250,000,000	250,000,000
Committed Amount	$ 250,000,000	$ 250,000,000
Effective Rate	3.82%	3.95%
Assets Pledged	$ 0	$ 0
Restricted Cash Pledged	0	0
Promissory Note, due December 2023
Line of Credit Facility [Line Items]
Utilized Balance	250,000,000	250,000,000
Committed Amount	$ 250,000,000	$ 250,000,000
Effective Rate	5.07%	5.25%
Assets Pledged	$ 0	$ 0
Restricted Cash Pledged	0	0
Promissory Note, due December 2022
Line of Credit Facility [Line Items]
Utilized Balance	250,000,000	250,000,000
Committed Amount	$ 250,000,000	$ 250,000,000
Effective Rate	4.83%	5.00%
Assets Pledged	$ 0	$ 0
Restricted Cash Pledged	0	0
Promissory Note, due May 2021
Line of Credit Facility [Line Items]
Utilized Balance		250,000,000
Committed Amount		$ 250,000,000
Effective Rate		2.25%
Assets Pledged		$ 0
Restricted Cash Pledged		0
Promissory Note, due March 2021
Line of Credit Facility [Line Items]
Utilized Balance		300,000,000
Committed Amount		$ 300,000,000
Effective Rate		3.95%
Assets Pledged		$ 0
Restricted Cash Pledged		0
Promissory Note, due May 2023
Line of Credit Facility [Line Items]
Utilized Balance	350,000,000	350,000,000
Committed Amount	$ 350,000,000	$ 350,000,000
Effective Rate	3.67%	3.80%
Assets Pledged	$ 0	$ 0
Restricted Cash Pledged	0	0
Promissory Note, due November 2022
Line of Credit Facility [Line Items]
Utilized Balance	400,000,000	400,000,000
Committed Amount	$ 400,000,000	$ 400,000,000
Effective Rate	2.90%	3.00%
Assets Pledged	$ 0	$ 0
Restricted Cash Pledged	0	0
Promissory Note, due April 2023
Line of Credit Facility [Line Items]
Utilized Balance	450,000,000	450,000,000
Committed Amount	$ 450,000,000	$ 450,000,000
Effective Rate	5.92%	6.13%
Assets Pledged	$ 0	$ 0
Restricted Cash Pledged	0	0
Promissory Note, due June 2022
Line of Credit Facility [Line Items]
Utilized Balance	500,000,000	500,000,000
Committed Amount	$ 500,000,000	$ 500,000,000
Effective Rate	3.19%	3.30%
Assets Pledged	$ 0	$ 0
Restricted Cash Pledged	0	0
Promissory Note due July 2024
Line of Credit Facility [Line Items]
Utilized Balance	500,000,000	500,000,000
Committed Amount	$ 500,000,000	$ 500,000,000
Effective Rate	3.77%	3.90%
Assets Pledged	$ 0	$ 0
Restricted Cash Pledged	0	0
Promissory Note, due March 2022
Line of Credit Facility [Line Items]
Utilized Balance	650,000,000	650,000,000
Committed Amount	$ 650,000,000	$ 650,000,000
Effective Rate	4.06%	4.20%
Assets Pledged	$ 0	$ 0
Restricted Cash Pledged	0	0
Promissory Note, due August 2021
Line of Credit Facility [Line Items]
Utilized Balance		650,000,000
Committed Amount		$ 650,000,000
Effective Rate		3.44%
Assets Pledged		$ 0
Restricted Cash Pledged		0
Promissory Note due September 2023
Line of Credit Facility [Line Items]
Utilized Balance	750,000,000	750,000,000
Committed Amount	$ 750,000,000	$ 750,000,000
Effective Rate	3.17%	3.27%
Assets Pledged	$ 0	$ 0
Restricted Cash Pledged	0	0
Promissory Note, due May 2025
Line of Credit Facility [Line Items]
Utilized Balance	1,000,000,000	1,000,000,000
Committed Amount	$ 1,000,000,000	$ 1,000,000,000
Effective Rate	3.86%	3.99%
Assets Pledged	$ 0	$ 0
Restricted Cash Pledged	0	0
Promissory Note, due June 2022
Line of Credit Facility [Line Items]
Utilized Balance	2,000,000,000	2,000,000,000
Committed Amount	$ 2,000,000,000	$ 2,000,000,000
Effective Rate	2.03%	1.40%
Assets Pledged	$ 0	$ 0
Restricted Cash Pledged	0	0
Promissory Note, due September 2022
Line of Credit Facility [Line Items]
Utilized Balance	2,000,000,000	2,000,000,000
Committed Amount	$ 2,000,000,000	$ 2,000,000,000
Effective Rate	1.01%	1.04%
Assets Pledged	$ 0	$ 0
Restricted Cash Pledged	0	0
Line of credit, due July 2021
Line of Credit Facility [Line Items]
Utilized Balance	0	0
Committed Amount	$ 500,000,000	$ 500,000,000
Effective Rate	2.08%	2.08%
Assets Pledged	$ 0	$ 0
Restricted Cash Pledged	0	0
Line of credit, due March 2023
Line of Credit Facility [Line Items]
Utilized Balance	0
Committed Amount	$ 2,500,000,000
Effective Rate	3.28%
Assets Pledged	$ 0
Restricted Cash Pledged	$ 0
Line of credit, due March 2022
Line of Credit Facility [Line Items]
Utilized Balance		0
Committed Amount		$ 2,500,000,000
Effective Rate		3.28%
Assets Pledged		$ 0
Restricted Cash Pledged		$ 0

Debt - Facilities with Santande

Debt - Facilities with Santander and Related Subsidiaries, Narrative (Details)	Sep. 30, 2021USD ($)
Revolving credit facilities \| Facilities with Santander and related subsidiaries
Line of Credit Facility [Line Items]
Committed amount	$ 500,000,000
Unsecured debt \| Facilities with Santander and related subsidiaries
Line of Credit Facility [Line Items]
Committed amount	5,600,000,000
Unsecured debt \| Facilities with Santander
Line of Credit Facility [Line Items]
Committed amount	$ 4,000,000,000

Debt - Summary of Secured Struc

Debt - Summary of Secured Structured Financings (Details) - Secured Structured Financings - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Balance	$ 28,831,858	$ 26,177,401
Initial Note Amounts Issued	60,591,058	55,523,298
Collateral	38,160,613	36,254,700
Restricted Cash	1,682,089	1,734,136
Public securitizations
Debt Instrument [Line Items]
Balance	24,657,131	18,942,160
Initial Note Amounts Issued	51,829,495	44,775,735
Collateral	31,403,177	25,022,577
Restricted Cash	1,665,870	1,710,351
2016 Securitizations
Debt Instrument [Line Items]
Balance		259,078
Initial Note Amounts Issued		2,519,810
Collateral		354,985
Restricted Cash		$ 85,041
2016 Securitizations \| Minimum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate		1.63%
2016 Securitizations \| Maximum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate		2.34%
2017 Securitizations
Debt Instrument [Line Items]
Balance	118,293	$ 1,049,867
Initial Note Amounts Issued	3,889,470	8,262,940
Collateral	564,070	1,661,845
Restricted Cash	$ 90,895	$ 211,606
2017 Securitizations \| Minimum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate	1.35%	1.35%
2017 Securitizations \| Maximum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate	2.52%	2.52%
2018 Securitizations
Debt Instrument [Line Items]
Balance	$ 1,606,743	$ 2,723,099
Initial Note Amounts Issued	11,000,280	12,039,840
Collateral	2,510,723	4,130,936
Restricted Cash	$ 264,577	$ 376,246
2018 Securitizations \| Minimum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate	2.41%	2.41%
2018 Securitizations \| Maximum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate	3.42%	3.42%
2019 Securitizations
Debt Instrument [Line Items]
Balance	$ 4,249,645	$ 6,653,226
Initial Note Amounts Issued	11,924,720	11,924,720
Collateral	5,788,406	8,582,241
Restricted Cash	$ 466,789	$ 488,546
2019 Securitizations \| Minimum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate	2.08%	2.08%
2019 Securitizations \| Maximum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate	3.34%	3.34%
2020 Securitizations
Debt Instrument [Line Items]
Balance	$ 5,629,703	$ 8,256,890
Initial Note Amounts Issued	10,028,425	10,028,425
Collateral	7,256,352	10,292,570
Restricted Cash	$ 364,410	$ 548,912
2020 Securitizations \| Minimum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate	0.60%	0.60%
2020 Securitizations \| Maximum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate	2.73%	2.73%
2021 Securitizations
Debt Instrument [Line Items]
Balance	$ 13,052,747
Initial Note Amounts Issued	14,986,600
Collateral	15,283,626
Restricted Cash	$ 479,199
2021 Securitizations \| Minimum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate	0.48%
2021 Securitizations \| Maximum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate	0.65%
Privately issued amortizing notes
Debt Instrument [Line Items]
Balance	$ 4,174,727	$ 7,235,241
Initial Note Amounts Issued	8,761,563	10,747,563
Collateral	6,757,436	11,232,123
Restricted Cash	16,219	23,785
2013 Private issuances
Debt Instrument [Line Items]
Balance	230,404	777,210
Initial Note Amounts Issued	$ 1,537,025	$ 1,537,025
Initial Weighted Average Interest Rate	1.28%	1.28%
Collateral	$ 1,015,024	$ 1,843,443
Restricted Cash	751	751
2018 Private issuances
Debt Instrument [Line Items]
Balance	1,452,711	2,768,145
Initial Note Amounts Issued	2,200,002	4,186,002
Collateral	2,111,645	4,223,567
Restricted Cash	$ 0	$ 7,675
2018 Private issuances \| Minimum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate	2.42%	2.42%
2018 Private issuances \| Maximum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate	3.17%	3.53%
2019 Private issuance
Debt Instrument [Line Items]
Balance	$ 1,517,437	$ 2,584,974
Initial Note Amounts Issued	3,524,536	3,524,536
Collateral	2,300,073	3,632,833
Restricted Cash	$ 10,566	$ 10,457
2019 Private issuance \| Minimum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate	2.45%	2.45%
2019 Private issuance \| Maximum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate	3.90%	3.90%
2020 Private issuance
Debt Instrument [Line Items]
Balance	$ 974,175	$ 1,104,912
Initial Note Amounts Issued	1,500,000	1,500,000
Collateral	1,330,694	1,532,280
Restricted Cash	$ 4,902	$ 4,902
2020 Private issuance \| Minimum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate	1.29%	1.29%
2020 Private issuance \| Maximum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate	2.68%	2.68%

Debt - Secured Structured Finan

Debt - Secured Structured Financings, Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Debt Disclosure [Abstract]
Private issuance notes secured with vehicle lease	$ 6,600,000		$ 6,600,000		$ 8,700,000
Amortized debt issuance costs	13,213	$ 10,265	37,100	$ 28,301
Interest expense on secured structured financing	$ 103,511	$ 150,734	$ 342,168	$ 522,266

Shareholders' Equity - Addition

Shareholders' Equity - Additional Information (Details) - USD ($)	1 Months Ended	9 Months Ended
	Aug. 31, 2021	Sep. 30, 2021	Dec. 31, 2020	Jun. 30, 2019
Class of Stock [Line Items]
Share repurchase program, authorized amount				$ 1,100,000,000
Number of shares withheld to cover income taxes related to vesting of RSUs (in shares)		57,425,382	57,067,635
Treasury stock value		$ 1,311,339,000	$ 1,301,864,000
Number of shares withheld for income tax (in shares)		0
Noncontrolling Shareholders \| Private Placement
Class of Stock [Line Items]
Sale of stock, price per share (in dollars per share)	$ 41.50
Total value of sale of stock	$ 12,700,000,000

Shareholders' Equity - Tender O

Shareholders' Equity - Tender Offer and Other Share Repurchase Programs (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Equity, Class of Treasury Stock [Line Items]
Number of shares purchased (in shares)	0	10,198,800	357,747	33,471,268,000
Average price per share (in dollars per share)	$ 0	$ 21.91	$ 26.46	$ 23.14
Cost of share purchased	$ 0	$ 223,485	$ 9,468	$ 774,457
Tender Offer
Equity, Class of Treasury Stock [Line Items]
Number of shares purchased (in shares)	0	0	0	17,514,707
Average price per share (in dollars per share)	$ 0	$ 0	$ 0	$ 26
Cost of share purchased	$ 0	$ 0	$ 0	$ 455,382
Other Share Repurchases
Equity, Class of Treasury Stock [Line Items]
Number of shares purchased (in shares)	0	10,198,800	357,747	15,956,561
Average price per share (in dollars per share)	$ 0	$ 21.91	$ 26.46	$ 20
Cost of share purchased	$ 0	$ 223,485	$ 9,468	$ 319,075

Shareholders' Equity - Summary

Shareholders' Equity - Summary of Changes in Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 7,229,630	$ 4,895,465	$ 5,621,961	$ 7,318,620
Other comprehensive income (loss) before reclassifications (gross)	414	94	2,603	(43,212)
Amounts (gross) reclassified out of accumulated other comprehensive income (loss)	5,247	6,729	16,769	13,023
Ending balance	7,932,730	5,094,812	7,932,730	5,094,812
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(36,855)	(63,705)	(50,566)	(26,693)
Ending balance	$ (31,194)	$ (56,882)	$ (31,194)	$ (56,882)

Shareholders' Equity - Reclassi

Shareholders' Equity - Reclassification of Amounts Out of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income On Derivatives [Line Items]
Interest expense	$ 218,747	$ 292,118	$ 709,479	$ 929,934
Income tax expense	(208,607)	(172,476)	(775,484)	(137,161)
Net income	763,324	490,115	2,563,181	389,450
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income On Derivatives [Line Items]
Net income	5,247	6,729	16,769	13,023
Reclassification out of Accumulated Other Comprehensive Income \| Unrealized Gains (Losses) on Cash Flow Hedges
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income On Derivatives [Line Items]
Interest expense	6,946	8,939	22,254	17,260
Income tax expense	$ (1,699)	$ (2,210)	$ (5,485)	$ (4,237)

Shareholders' Equity - Dividend

Shareholders' Equity - Dividends (Details)	1 Months Ended
Shareholders' Equity - Dividends (Details)	Aug. 31, 2021$ / shares
Equity [Abstract]
Dividends paid per share (in dollars per share)	$ 0.22

Derivative Financial Instrume_3

Derivative Financial Instruments - Summary of Underlying Notional Amounts and Aggregate Fair Values (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Derivative [Line Items]
Asset	$ 13,314	$ 4,740
Liability	(21,399)	(88,140)
Interest rate swaps \| Not Designated As Hedges
Derivative [Line Items]
Notional	250,000	250,000
Asset	0	0
Liability	(8,085)	(12,934)
Interest rate swaps \| Cash Flow Hedging \| Designated as Hedges
Derivative [Line Items]
Notional	0	2,450,000
Asset	0	123
Liability	0	(70,589)
Interest rate cap agreements
Derivative [Line Items]
Notional	7,649,971	10,199,134
Asset	13,314	4,617
Liability	0	0
Options for interest rate cap agreements
Derivative [Line Items]
Notional	7,649,971	10,199,134
Asset	0	0
Liability	$ (13,314)	$ (4,617)

Derivative Financial Instrume_4

Derivative Financial Instruments - Offsetting of Derivative Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Gross Amounts Not Offset in the Consolidated Balance Sheet
Assets Presented in the Consolidated Balance Sheet	$ 13,314	$ 4,740
Total derivatives not subject to a master netting arrangement or similar arrangement	0	0
Total derivative assets	13,314	4,740
Total financial assets	13,314	4,740
Collateral Received	(13,314)	(4,740)
Collateral Received, Total financial assets	(13,314)	(4,740)
Net Amount	0	0
Net Amount, Total derivative assets	0	0
Net Amount, Total financial assets	0	0
Gross Amounts Not Offset in the Consolidated Balance Sheet
Liabilities Presented in the Consolidated Balance Sheet	21,399	88,140
Total derivatives not subject to a master netting arrangement or similar arrangement	0	0
Total derivative liabilities	21,399	88,140
Total financial liabilities	21,399	88,140
Collateral Pledged	(15,304)	(88,140)
Collateral Pledged, Total financial liabilities	(15,304)	(88,140)
Net Amount	6,095	0
Net Amount, Total derivative liabilities	6,095	0
Net Amount, Total financial liabilities	6,095	0
Interest rate swaps \| Third Party
Gross Amounts Not Offset in the Consolidated Balance Sheet
Assets Presented in the Consolidated Balance Sheet		123
Collateral Received		(123)
Net Amount		0
Gross Amounts Not Offset in the Consolidated Balance Sheet
Liabilities Presented in the Consolidated Balance Sheet	8,085	83,523
Collateral Pledged	(8,085)	(83,523)
Net Amount	0	0
Interest rate caps
Gross Amounts Not Offset in the Consolidated Balance Sheet
Total derivative assets	13,314	4,617
Gross Amounts Not Offset in the Consolidated Balance Sheet
Total derivative liabilities	0	0
Interest rate caps \| Third Party
Gross Amounts Not Offset in the Consolidated Balance Sheet
Assets Presented in the Consolidated Balance Sheet	10,980	4,154
Collateral Received	(10,980)	(4,154)
Net Amount	0	0
Gross Amounts Not Offset in the Consolidated Balance Sheet
Liabilities Presented in the Consolidated Balance Sheet	10,980	4,154
Collateral Pledged	(4,885)	(4,154)
Net Amount	6,095	0
Interest rate caps \| Santander and Affiliates
Gross Amounts Not Offset in the Consolidated Balance Sheet
Assets Presented in the Consolidated Balance Sheet	2,334	463
Collateral Received	(2,334)	(463)
Net Amount	0	0
Gross Amounts Not Offset in the Consolidated Balance Sheet
Liabilities Presented in the Consolidated Balance Sheet	2,334	463
Collateral Pledged	(2,334)	(463)
Net Amount	$ 0	$ 0

Derivative Financial Instrume_5

Derivative Financial Instruments - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		36 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Derivative [Line Items]
Estimated unrealized gain to be reclassified from AOCI to interest expense in next 12 months	$ 24,259		$ 24,259
Interest Rate Swaps
Derivative [Line Items]
Fair value adjustment	6,500
Reclassification from AOCI into earnings	50,600
Reclassification from AOCI for terminated swaps	7,900
Interest Rate Swaps \| Designated as Hedges
Derivative [Line Items]
Reclassification from AOCI into earnings	$ (6,946)	$ (8,939)	$ (22,254)	$ (17,260)
Interest Rate Swaps \| Designated as Hedges \| Cash Flow Hedging
Derivative [Line Items]
Aggregate notional amount					$ 2,200,000
Interest Rate Swaps \| Minimum \| Designated as Hedges \| Cash Flow Hedging
Derivative [Line Items]
Derivative term (in years)					2 years
Interest Rate Swaps \| Maximum \| Designated as Hedges \| Cash Flow Hedging
Derivative [Line Items]
Derivative term (in years)					5 years

Derivative Financial Instrume_6

Derivative Financial Instruments - Gross Gains (Losses) Reclassified from Accumulated Other Comprehensive Income (Details) - Interest Rate Swaps - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Derivative Instruments Gain Loss [Line Items]
Gross amount Reclassified From Accumulated Other Comprehensive Income to Interest Expense	$ 50,600
Designated as Hedges
Derivative Instruments Gain Loss [Line Items]
Recognized in Earnings	0	$ 0	$ 0	$ 0
Gross Gains (Loss) Recognized in Accumulated Other Comprehensive Income (Loss)	1,023	256	4,687	(59,405)
Gross amount Reclassified From Accumulated Other Comprehensive Income to Interest Expense	(6,946)	(8,939)	(22,254)	(17,260)
Not Designated As Hedges \| Interest Expense
Derivative Instruments Gain Loss [Line Items]
Recognized in Earnings	$ 143	$ 567	$ 113	$ 10,774

Fair Value of Financial Instr_3

Fair Value of Financial Instruments - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other assets — available-for-sale-debt securities	$ 90,688	$ 95,654
Recurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other assets — available-for-sale-debt securities	90,688	95,654
Retail installment contracts, non-accrual status	6,170	5,614
Retail installment contracts, non-accrual status	541	1,129
Recurring \| Interest Rate Caps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other assets — derivative instruments	13,314	4,617
Recurring \| Interest Rate Swaps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other liabilities	8,085	12,934
Recurring \| Interest Rate Swaps \| Cash Flow Hedging
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other assets — derivative instruments	0	123
Other liabilities	0	70,589
Recurring \| Trading Options for Interest Rate Caps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other liabilities	13,314	4,617
Recurring \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other assets — available-for-sale-debt securities	0	0
Retail installment contracts, non-accrual status	0	0
Recurring \| Level 1 \| Interest Rate Caps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other assets — derivative instruments	0	0
Recurring \| Level 1 \| Interest Rate Swaps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other liabilities	0	0
Recurring \| Level 1 \| Interest Rate Swaps \| Cash Flow Hedging
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other assets — derivative instruments	0	0
Other liabilities	0	0
Recurring \| Level 1 \| Trading Options for Interest Rate Caps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other liabilities	0	0
Recurring \| Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other assets — available-for-sale-debt securities	90,688	95,654
Retail installment contracts, non-accrual status	3,774	0
Recurring \| Level 2 \| Interest Rate Caps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other assets — derivative instruments	13,314	4,617
Recurring \| Level 2 \| Interest Rate Swaps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other liabilities	8,085	12,934
Recurring \| Level 2 \| Interest Rate Swaps \| Cash Flow Hedging
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other assets — derivative instruments	0	123
Other liabilities	0	70,589
Recurring \| Level 2 \| Trading Options for Interest Rate Caps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other liabilities	13,314	4,617
Recurring \| Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other assets — available-for-sale-debt securities	0	0
Recurring \| Level 3 \| Interest Rate Caps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other assets — derivative instruments	0	0
Recurring \| Level 3 \| Interest Rate Swaps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other liabilities	0	0
Recurring \| Level 3 \| Interest Rate Swaps \| Cash Flow Hedging
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other assets — derivative instruments	0	0
Other liabilities	0	0
Recurring \| Level 3 \| Trading Options for Interest Rate Caps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other liabilities	$ 0	$ 0

Fair Value of Financial Instr_4

Fair Value of Financial Instruments - Change in Level 3 Balances (Details) - Loans Receivable - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance — beginning of year	$ 2,841	$ 10,585	$ 5,614	$ 4,719
Additions / issuances	1,171	0	1,171	2,512
Transfers from level 2	0	0	0	17,634
Net collection activities	(1,616)	(2,410)	(4,389)	(16,854)
Gains recognized in earnings	0	73	0	237
Balance — end of year	$ 2,396	$ 8,248	$ 2,396	$ 8,248

Fair Value of Financial Instr_5

Fair Value of Financial Instruments - Assets and Liabilities Measured at Fair Value on Nonrecurring Basis (Details) - Nonrecurring - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Vehicles
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets, fair value	$ 269,627	$ 311,557
Lower of cost or fair value expense	0	0
Personal loans held for sale
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Personal loans held for sale	0	893,479
Lower of cost or fair value expense	0	355,136
Retail installment contracts held-for-sale
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Personal loans held for sale	359,561	674,048
Lower of cost or fair value expense	0	7,385
Auto loans impaired due to bankruptcy
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets, fair value	204,594	191,785
Lower of cost or fair value expense	$ 0	$ 0

Fair Value of Financial Instr_6

Fair Value of Financial Instruments - Quantitative Information for Assets and Liabilities (Details) $ in Thousands	Sep. 30, 2021USD ($)	Dec. 31, 2020USD ($)
Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Retail installment contracts, non-accrual status	$ 6,170	$ 5,614
Retail installment contracts held for investment \| Level 3 \| Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Retail installment contracts, non-accrual status	$ 2,396	$ 5,614
Retail installment contracts held for investment \| Level 3 \| Discounted Cash Flow \| Discount Rate \| Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-investment, measurement input	0.07	0.07
Retail installment contracts held for investment \| Level 3 \| Discounted Cash Flow \| Discount Rate \| Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-investment, measurement input	0.13	0.11
Retail installment contracts held for investment \| Level 3 \| Discounted Cash Flow \| Discount Rate \| Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-investment, measurement input	0.09
Retail installment contracts held for investment \| Level 3 \| Discounted Cash Flow \| Default Rate \| Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-investment, measurement input	0.04	0.04
Retail installment contracts held for investment \| Level 3 \| Discounted Cash Flow \| Default Rate \| Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-investment, measurement input	0.10	0.20
Retail installment contracts held for investment \| Level 3 \| Discounted Cash Flow \| Default Rate \| Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-investment, measurement input	0.07
Retail installment contracts held for investment \| Level 3 \| Discounted Cash Flow \| Prepayment Rate \| Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-investment, measurement input	0.04	0.15
Retail installment contracts held for investment \| Level 3 \| Discounted Cash Flow \| Prepayment Rate \| Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-investment, measurement input	0.15	0.25
Retail installment contracts held for investment \| Level 3 \| Discounted Cash Flow \| Prepayment Rate \| Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-investment, measurement input	0.15
Retail installment contracts held for investment \| Level 3 \| Discounted Cash Flow \| Loss Severity Rate \| Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-investment, measurement input	0.50	0.50
Retail installment contracts held for investment \| Level 3 \| Discounted Cash Flow \| Loss Severity Rate \| Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-investment, measurement input	0.60	0.60
Retail installment contracts held for investment \| Level 3 \| Discounted Cash Flow \| Loss Severity Rate \| Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-investment, measurement input	0.56
Personal loans held for sale \| Nonrecurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, fair value disclosure	$ 0	$ 893,479
Personal loans held for sale \| Level 3 \| Nonrecurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, fair value disclosure		$ 893,479
Personal loans held for sale \| Level 3 \| Market Approach \| Market Participant View \| Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input		0.60
Personal loans held for sale \| Level 3 \| Market Approach \| Market Participant View \| Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input		0.70
Personal loans held for sale \| Level 3 \| Income Approach \| Discount Rate \| Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input		0.20
Personal loans held for sale \| Level 3 \| Income Approach \| Discount Rate \| Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input		0.30
Personal loans held for sale \| Level 3 \| Income Approach \| Default Rate \| Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input		0.35
Personal loans held for sale \| Level 3 \| Income Approach \| Default Rate \| Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input		0.45
Personal loans held for sale \| Level 3 \| Income Approach \| Loss Severity Rate \| Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input		0.90
Personal loans held for sale \| Level 3 \| Income Approach \| Loss Severity Rate \| Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input		0.95
Personal loans held for sale \| Level 3 \| Income Approach \| Net Principal & Interest Payment Rate \| Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input		0.65
Personal loans held for sale \| Level 3 \| Income Approach \| Net Principal & Interest Payment Rate \| Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input		0.75
Retail installment contracts held-for-sale \| Nonrecurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, fair value disclosure	359,561	$ 674,048
Retail installment contracts held-for-sale \| Level 3 \| Nonrecurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, fair value disclosure	$ 359,561	$ 674,048
Retail installment contracts held-for-sale \| Level 3 \| Discounted Cash Flow \| Discount Rate \| Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input	0.01	0.015
Retail installment contracts held-for-sale \| Level 3 \| Discounted Cash Flow \| Discount Rate \| Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input	0.02	0.025
Retail installment contracts held-for-sale \| Level 3 \| Discounted Cash Flow \| Discount Rate \| Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input	0.02
Retail installment contracts held-for-sale \| Level 3 \| Discounted Cash Flow \| Default Rate \| Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input	0.04	0.02
Retail installment contracts held-for-sale \| Level 3 \| Discounted Cash Flow \| Default Rate \| Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input	0.10	0.04
Retail installment contracts held-for-sale \| Level 3 \| Discounted Cash Flow \| Default Rate \| Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input	0.07
Retail installment contracts held-for-sale \| Level 3 \| Discounted Cash Flow \| Prepayment Rate \| Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input	0.15	0.10
Retail installment contracts held-for-sale \| Level 3 \| Discounted Cash Flow \| Prepayment Rate \| Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input	0.20	0.20
Retail installment contracts held-for-sale \| Level 3 \| Discounted Cash Flow \| Prepayment Rate \| Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input	0.17
Retail installment contracts held-for-sale \| Level 3 \| Discounted Cash Flow \| Loss Severity Rate \| Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input	0.50	0.50
Retail installment contracts held-for-sale \| Level 3 \| Discounted Cash Flow \| Loss Severity Rate \| Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input	0.55	0.60
Retail installment contracts held-for-sale \| Level 3 \| Discounted Cash Flow \| Loss Severity Rate \| Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input	0.52

Fair Value of Financial Instr_7

Fair Value of Financial Instruments - Summary of Fair Value Estimates, Methods and Assumptions (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Assets:
Investments in debt securities held to maturity	$ 101,815
Carrying Value
Assets:
Cash and cash equivalents	2,106,405	$ 109,053
Finance receivables held for investment, net	27,272,976	26,806,606
Restricted cash	2,248,667	2,221,094
Investments in debt securities held to maturity	101,815	44,841
Total	31,729,863	29,181,594
Liabilities:
Notes payable — facilities with third parties	0	4,159,955
Notes payable — secured structured financings	28,831,858	26,177,401
Notes payable — facilities with Santander and related subsidiaries	9,600,000	10,801,318
Total	38,431,858	41,138,674
Estimated Fair Value
Assets:
Cash and cash equivalents	2,106,405	109,053
Finance receivables held for investment, net	29,878,212	29,464,066
Restricted cash	2,248,667	2,221,094
Investments in debt securities held to maturity	102,449	45,606
Total	34,335,733	31,839,819
Liabilities:
Notes payable — facilities with third parties	0	4,159,955
Notes payable — secured structured financings	29,089,183	26,673,970
Notes payable — facilities with Santander and related subsidiaries	9,798,720	11,333,823
Total	38,887,903	42,167,748
Estimated Fair Value \| Level 1
Assets:
Cash and cash equivalents	2,106,405	109,053
Finance receivables held for investment, net	0	0
Restricted cash	2,248,667	2,221,094
Investments in debt securities held to maturity	0	0
Total	4,355,072	2,330,147
Liabilities:
Notes payable — facilities with third parties	0	0
Notes payable — secured structured financings	0	0
Notes payable — facilities with Santander and related subsidiaries	0	0
Total	0	0
Estimated Fair Value \| Level 2
Assets:
Cash and cash equivalents	0	0
Finance receivables held for investment, net	47,691	0
Restricted cash	0	0
Investments in debt securities held to maturity	102,449	45,606
Total	150,140	45,606
Liabilities:
Notes payable — facilities with third parties	0	0
Notes payable — secured structured financings	24,644,581	18,291,898
Notes payable — facilities with Santander and related subsidiaries	0	0
Total	24,644,581	18,291,898
Estimated Fair Value \| Level 3
Assets:
Cash and cash equivalents	0	0
Finance receivables held for investment, net	29,830,521	29,464,066
Restricted cash	0	0
Investments in debt securities held to maturity	0	0
Total	29,830,521	29,464,066
Liabilities:
Notes payable — facilities with third parties	0	4,159,955
Notes payable — secured structured financings	4,444,602	8,382,072
Notes payable — facilities with Santander and related subsidiaries	9,798,720	11,333,823
Total	$ 14,243,322	$ 23,875,850

Investment Gains (Losses), Ne_2

Investment Gains (Losses), Net - Schedule of Investment Gains (Losses), Net (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Investments, Debt and Equity Securities [Abstract]
Gain (loss) on sale of loans and leases	$ 2,003	$ (13,669)	$ 19,412	$ (40,553)
Lower of cost or market adjustments	0	(56,598)	(31,848)	(241,198)
Other gains, net	3,238	1,278	5,379	1,754
Investment gains (losses), net	$ 5,241	$ (68,989)	$ (7,057)	$ (279,997)

Investment Gains (Losses), Ne_3

Investment Gains (Losses), Net - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Investments, Debt and Equity Securities [Abstract]
Lower of cost or market adjustment, customer default activity	$ 0	$ 81,247,000	$ 65,047,000	$ 278,144,000
Lower of cost or market adjustment	$ 0	$ 24,649,000	$ (33,199,000)	$ 36,946,000

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
Income Taxes - Narrative (Details) - USD ($)	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Income tax expense	$ 208,607,000	$ 172,476,000	$ 775,484,000	$ 137,161,000
Effective income tax rate	21.50%	26.00%	23.20%	26.00%
Related party income tax receivables	$ 642,000		$ 642,000		$ 11,191,000
Earnings that are considered indefinitely reinvested	$ 0		$ 0		$ 0

Computation of Basic and Dilu_3

Computation of Basic and Diluted Earnings per Common Share - Additional Information (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Employee Stock Option
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Awards excluded from computation of earnings per share (in shares)	0	52,114	0	52,114

Computation of Basic and Dilu_4

Computation of Basic and Diluted Earnings per Common Share - Summary of Computation of Basic and Diluted Earnings per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings per common share
Net income	$ 763,324	$ 490,115	$ 2,563,181	$ 389,450
Weighted average number of common shares outstanding (in shares)	306,093,379	310,150,293	306,086,399	321,275,907
Earnings per common share (in dollars per share)	$ 2.49	$ 1.58	$ 8.37	$ 1.21
Earnings per common share - assuming dilution
Net income	$ 763,324	$ 490,115	$ 2,563,181	$ 389,450
Weighted average number of common shares outstanding (in shares)	306,093,379	310,150,293	306,086,399	321,275,907
Effect of employee stock-based awards (in shares)	286,000	157,000	268,000	216,000
Weighted average number of common shares outstanding - assuming dilution (in shares)	306,378,733	310,307,265	306,354,463	321,492,331
Earnings per common share - assuming dilution (in dollars per share)	$ 2.49	$ 1.58	$ 8.37	$ 1.21

Commitments and Contingencies -

Commitments and Contingencies - Liabilities for Commitments and Contingencies (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Loss Contingencies [Line Items]
Total commitments and contingencies	$ 106,841	$ 99,250
Consumer arrangements
Loss Contingencies [Line Items]
Contingencies	29,070	22,155
Aggregate legal and regulatory liabilities
Loss Contingencies [Line Items]
Contingencies	6,348	31,936
Revenue-sharing and gain/(loss), net-sharing payments \| MPLFA
Loss Contingencies [Line Items]
Commitments	70,675	43,778
Servicer performance fee \| Bank of America
Loss Contingencies [Line Items]
Commitments	462	1,200
Loss-sharing payments \| CBP
Loss Contingencies [Line Items]
Commitments	$ 286	$ 181

Commitments and Contingencies_2

Commitments and Contingencies - MPFLA (Details) - MPLFA - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Other Commitments [Line Items]
Funding available for FCA retail financing	$ 4,500,000,000
Minimum
Other Commitments [Line Items]
Funding available for dealer inventory financing	5,000,000,000
Revenue-sharing and gain/(loss), net-sharing payments
Other Commitments [Line Items]
Amount accrued for the payments	$ 70,675,000	$ 43,778,000

Commitments and Contingencies_3

Commitments and Contingencies - Agreement with Bank of America (Details) - Bank of America - USD ($)	Jan. 31, 2017	Sep. 30, 2021	Dec. 31, 2020
Other Commitments [Line Items]
Commitment to sell loans	$ 300,000,000
Servicer performance payments due, period (in years)	6 years
Servicer performance fee
Other Commitments [Line Items]
Commitments		$ 462,000	$ 1,200,000

Commitments and Contingencies_4

Commitments and Contingencies - Agreement with CBP (Details) - CBP - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Other Commitments [Line Items]
Loans servicing, loss-sharing payment percentage	0.50%
Loss-sharing payments
Other Commitments [Line Items]
Commitments	$ 286	$ 181

Commitments and Contingencies_5

Commitments and Contingencies - Other Contingencies (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Consumer arrangements
Other Commitments [Line Items]
Accrual for miscellaneous contingencies	$ 29,070	$ 22,155

Commitments and Contingencies_6

Commitments and Contingencies - Legal and Regulatory Proceedings (Details) - USD ($)	1 Months Ended
	Jul. 31, 2021	Sep. 30, 2021	Dec. 31, 2020
Mississippi Attorney General Lawsuit
Loss Contingencies [Line Items]
Litigation settlement, amount awarded to other party	$ 3,700,000
Aggregate Legal and Regulatory Liabilities
Loss Contingencies [Line Items]
Contingencies		$ 6,348,000	$ 31,936,000
Maximum possible loss		$ 0

Commitments and Contingencies_7

Commitments and Contingencies - Agreements (Details) - USD ($)	9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020	Dec. 31, 2019	Nov. 30, 2015
Other Commitments [Line Items]
Repurchase requests outstanding	$ 0
Commitment to sell charged off loan receivables in bankruptcy sale					$ 350,000,000
Sales subject to market price check	275,000,000
Remaining aggregate commitment to sell charged off loan receivables	6,215,000		$ 15,318,000
Bluestem \| Purchase New Advances on Personal Revolving Finance Receivable
Other Commitments [Line Items]
Commitments			2,700,000,000	$ 3,000,000,000
Purchases of receivables	300,000,000		$ 1,200,000,000
Bluestem \| Purchase Of Receivables Related To New Opened Customer Accounts
Other Commitments [Line Items]
Purchases of receivables	$ 24,865,000	$ 151,163,000

Related-Party Transactions - Cr

Related-Party Transactions - Credit Facilities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
SHUSA
Related Party Transaction [Line Items]
Interest expense for affiliate lines/letters of credit	$ 68,320	$ 79,854	$ 214,550	$ 213,224
Accrued interest for affiliate lines/letters of credit	34,114		34,114		$ 40,234
Santander
Related Party Transaction [Line Items]
Interest expense for affiliate lines/letters of credit	11,587	$ 7,997	35,266	$ 8,700
Accrued interest for affiliate lines/letters of credit	$ 1,472		$ 1,472		$ 1,603

Related-Party Transactions - De

Related-Party Transactions - Derivatives (Details) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Related Party Transaction [Line Items]
Collateral overage on derivative liabilities	$ 13,314,000	$ 4,740,000
Santander and Affiliates
Related Party Transaction [Line Items]
Outstanding notional amount	3,255,024,000	3,148,850,000
Collateral overage on derivative liabilities	$ 495,000	$ 907,000

Related-Party Transactions - Re

Related-Party Transactions - Retail Installment Contracts and RV Marine (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Related Party Transaction [Line Items]
Servicing fee income	$ 19,975	$ 18,574	$ 61,481	$ 56,797
SBNA \| Serviced Auto Loan and Retail Installment
Related Party Transaction [Line Items]
Servicing fee income	$ 317	$ 472	$ 1,070	$ 1,566

Related-Party Transactions - Sc

Related-Party Transactions - Schedule of Serviced Auto Loan and Retail Installment Contract Portfolio (Details) - SBNA - Serviced Auto Loan and Retail Installment - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Related Party Transaction [Line Items]
Total serviced portfolio	$ 135,532	$ 190,504
Cash collections due to owner	24,395	19,650
Servicing fees receivable	$ 4,194	$ 1,769

Related-Party Transactions - _2

Related-Party Transactions - Dealer Lending (Details) - SBNA - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Related Party Transaction [Line Items]
Referral fee			$ 9,000,000
Referral fee, amortization period (in years)			10 years
Unamortized fee balance	$ 1,575,000		$ 1,575,000		$ 2,250,000
Income related to referral fee	225,000	$ 225,000	675,000	$ 675,000
Dealer Loan Portfolio
Related Party Transaction [Line Items]
Due from related parties	0		0		0
Loan Origination on Sales of Floorplan Inventory
Related Party Transaction [Line Items]
Due to related parties	$ 5,431,000		$ 5,431,000		$ 7,548,000

Related-Party Transactions - _3

Related-Party Transactions - Schedule of Transactions with SBNA (Details) - SBNA - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Origination and Renewal Fees
Related Party Transaction [Line Items]
Revenue from related parties	$ 0	$ 451	$ 0	$ 2,473
Servicing Fees Expenses
Related Party Transaction [Line Items]
Expenses from transaction with related party	$ 33	$ (9)	$ 193	$ 63

Related-Party Transactions - Or

Related-Party Transactions - Origination Support Services (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Related Party Transaction [Line Items]
Servicing fee income	$ 19,975	$ 18,574	$ 61,481	$ 56,797
SBNA \| Serviced Consumer Vehicle Lease Portfolio
Related Party Transaction [Line Items]
Servicing fee income	65		65
Affiliates \| SBNA \| Purchase of Retail Installment Contracts
Related Party Transaction [Line Items]
Additions to servicing asset	1,500,000	1,100,000	6,100,000	3,900,000
Affiliates \| SBNA \| Referral and Servicing Fee
Related Party Transaction [Line Items]
Revenue from related parties	13,408	7,902	40,477	29,457
Due from related parties	$ 1,987	$ 4,089	$ 1,987	$ 4,089

Related-Party Transactions - _4

Related-Party Transactions - Schedule of Consumer Vehicle Lease Portfolio Serviced for SBNA (Details) - SBNA - Serviced Consumer Vehicle Lease Portfolio - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Related Party Transaction [Line Items]
Total serviced portfolio	$ 243,531	$ 0
Origination and servicing fees receivable	342	0
Revenue share reimbursement receivable	$ 48	$ 0

Related-Party Transactions - Se

Related-Party Transactions - Securitizations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Related Party Transaction [Line Items]
Servicing fee income from affiliates	$ 9,916	$ 10,050	$ 29,217	$ 33,923
Santander
Related Party Transaction [Line Items]
Servicing fee income from affiliates	1,970	4,488	7,263	15,680
Due from related parties	614		614		$ 1,070
Due to related parties	4,789		4,789		$ 6,203
Affiliates \| SIS \| Fees Paid for Co-Management of Certain Securitizations
Related Party Transaction [Line Items]
Expenses from transaction with related party	$ 1,354	$ 103	$ 4,059	$ 1,625

Related-Party Transactions - Em

Related-Party Transactions - Employee Compensation (Details) - SHUSA - Administrative Services - Affiliates - USD ($) $ in Thousands	Sep. 30, 2021	Sep. 30, 2020
Related Party Transaction [Line Items]
Due from related parties	$ 4,467	$ 4,198
Due to related parties	$ 14,496	$ 9,221

Related-Party Transactions - Ot

Related-Party Transactions - Other Related Party Transactions (Details) ft² in Thousands, € in Millions	1 Months Ended	3 Months Ended		9 Months Ended
	Jul. 31, 2021USD ($)	Sep. 30, 2021USD ($)ft²	Sep. 30, 2020USD ($)	Sep. 30, 2021USD ($)ft²	Sep. 30, 2021EUR (€)	Sep. 30, 2020USD ($)	Dec. 31, 2020USD ($)
Related Party Transaction [Line Items]
Deposit and checking accounts balance		$ 2,016,932,000		$ 2,016,932,000			$ 32,490,000
AutoFi Inc. \| Mouro Capital
Related Party Transaction [Line Items]
Noncontrolling interest, ownership percentage by parent	10.30%
Affiliates \| SBNA
Related Party Transaction [Line Items]
Deposit and checking accounts balance		2,016,932,000		2,016,932,000			32,490,000
Collateralized financings		$ 6,808,000		$ 6,808,000			$ 27,000
Affiliates \| SBNA \| Sublease of Corporate Office Space
Related Party Transaction [Line Items]
Area of property (in square foot) \| ft²		13		13
Sublease income		$ 44,000	$ 44,000	$ 132,000		$ 132,000
Affiliates \| SBNA \| Fee for Payments Made at Retail Branch Locations
Related Party Transaction [Line Items]
Expenses from transaction with related party		33,000	39,000	100,000		140,000
Affiliates \| Santander \| Procurement Services
Related Party Transaction [Line Items]
Expenses from transaction with related party		1,062,000	785,000	2,635,000		2,079,000
Affiliates \| Santander \| Professional Services, Telecommunications, and Internal/External Application
Related Party Transaction [Line Items]
Expenses from transaction with related party		0	279,000	0		350,000
Affiliates \| SHUSA
Related Party Transaction [Line Items]
Cyber liability insurance, coverage limit \| €					€ 270
Affiliates \| SHUSA \| Allocated Portion of Insurance Premiums and Fees
Related Party Transaction [Line Items]
Expenses from transaction with related party		150,000	97,000	451,000		313,000
Affiliates \| SHUSA \| Various Other Insurance Products
Related Party Transaction [Line Items]
Expenses from transaction with related party		$ 661,000	$ 416,000	$ 1,687,000		$ 781,000
Affiliates \| AutoFi Inc. \| Payments for Design and Development of Digital Software, First Year
Related Party Transaction [Line Items]
Expenses from transaction with related party	$ 6,000,000
Affiliates \| AutoFi Inc. \| Payments for Design and Development of Digital Software, After First Year \| Minimum
Related Party Transaction [Line Items]
Expenses from transaction with related party	2,400,000
Affiliates \| AutoFi Inc. \| Payments for Design and Development of Digital Software, After First Year \| Maximum
Related Party Transaction [Line Items]
Expenses from transaction with related party	$ 3,000,000

Employee Benefit Plans - Additi

Employee Benefit Plans - Additional Information (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020	Dec. 31, 2013	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares issued (in shares)	363,536,761		363,159,613
Expiration period (in years)	10 years
Compensation expense paid	$ 8,989	$ 6,161
MEP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares stock awards available for grant (in shares)					29,000,000
Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares issued (in shares)				5,192,641
Omnibus Incentive Plan \| RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Transfer and sale restrictions period (in years)	1 year
Omnibus Incentive Plan \| RSUs \| Certain Officers
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock vesting period (in years)	3 years
Omnibus Incentive Plan \| RSUs \| Vesting One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock vesting period (in years)	3 years
Omnibus Incentive Plan \| RSUs \| Vesting Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock vesting period (in years)	5 years

Employee Benefit Plans - Summar

Employee Benefit Plans - Summary of Stock Options and Related Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Shares
Options outstanding as of beginning of period (in shares)	169,369
Granted (in shares)	0
Exercised (in shares)	(77,885)
Expired (in shares)	0
Forfeited (in shares)	0
Other (in shares)	0
Options outstanding as of end of period (in shares)	91,484	169,369
Options exercisable as of end of period (in shares)	91,484
Options expected to vest as of period end (in shares)	0
Weighted Average Exercise Price
Options outstanding as of beginning of period (in dollars per share)	$ 13.01
Granted (in dollars per share)	0
Exercised (in dollars per share)	10.08
Expired (in dollars per share)	0
Forfeited (in dollars per share)	0
Other (in dollars per share)	0
Options outstanding as of end of period (in dollars per share)	15.51	$ 13.01
Options exercisable, weighted average exercise price as of end of period (in dollars per share)	15.51
Options expected to vest, weighted average exercise price as of period end (in dollars per share)	$ 0
Weighted Average Remaining Contractual Term (Years)
Options outstanding (in years)	1 year 9 months 18 days	1 year 10 months 24 days
Options exercisable (in years)	1 year 9 months 18 days
Options expected to vest (in years)	0 years
Aggregate Intrinsic Value
Options outstanding as of beginning period	$ 1,543
Exercised	1,650
Options outstanding as of end of period	2,396	$ 1,543
Options exercisable	2,396
Option expected to vest	$ 0

Employee Benefit Plans - Schedu

Employee Benefit Plans - Schedule of Restricted Stock and Performance Stock Units (Details) - Restricted Stock and Performance Stock Units - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Shares
Outstanding as of beginning of period (in shares)	367,012
Granted (in shares)	438,435
Vested (in shares)	(401,549)
Forfeited/canceled (in shares)	(7,549)
Outstanding as of end of period (in shares)	396,349	367,012
Weighted Average Grant Date Fair Value
Outstanding as of beginning of period (in dollars per share)	$ 19.78
Granted (in dollars per share)	27.71
Vested (in dollars per share)	23.04
Forfeited/canceled (in dollars per share)	14.67
Outstanding as of end of period (in dollars per share)	$ 25.10	$ 19.78
Weighted Average Remaining Contractual Term (Years)
Option outstanding (in years)	1 year 1 month 6 days	9 months 18 days
Aggregate Intrinsic Value
Outstanding as of beginning of period		$ 8,082
Vested	$ 10,847
Unvested as of end of period	$ 16,528