MGM Growth Properties 10-K16 Feb 222021 FY Annual reportFinancial data

Company Profile

Cover page

Cover page - USD ($) $ in Billions	12 Months Ended
Cover page - USD ($) $ in Billions	Dec. 31, 2021	Feb. 14, 2022	Jun. 30, 2021
Document Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2021
Document Transition Report	false
Entity File Number	001-37733
Entity Registrant Name	MGM Growth Properties LLC
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	47-5513237
Entity Address, Address Line One	1980 Festival Plaza Drive
Entity Address, Address Line Two	Suite 750
Entity Address, City or Town	Las Vegas
Entity Address, State or Province	NV
Entity Address, Postal Zip Code	89135
City Area Code	702
Local Phone Number	669-1480
Title of 12(b) Security	Class A Shares, no par value
Trading Symbol	MGP
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntarily Files	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth	false
Public Float			$ 5.7
Entity Common Stock, Shares Outstanding		156,750,325
ICFR Auditor Attestation Flag	true
Documents Incorporated by Reference	Portions of the MGM Growth Properties LLC’s definitive Proxy Statement for its 2022 Annual Meeting of Stockholders are incorporated by reference into Part III of this Form 10-K.
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Entity Central Index Key	0001656936
Current Fiscal Year End Date	--12-31
Entity Shell Company	false
MGP Operating Partnership
Document Information [Line Items]
Entity File Number	333-215571
Entity Registrant Name	MGM Growth Properties Operating Partnership LP
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	81-1162318
Entity Well-known Seasoned Issuer	No
Entity Voluntarily Files	Yes
Entity Current Reporting Status	No
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth	false
ICFR Auditor Attestation Flag	false
Entity Central Index Key	0001691299
Entity Shell Company	false

Audit Information

Audit Information	12 Months Ended
Audit Information	Dec. 31, 2021
Auditor [Abstract]
Auditor Name	Deloitte & Touche LLP
Auditor Location	Las Vegas, Nevada
Auditor Firm ID	34

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
ASSETS
Real estate investments, net	$ 8,780,521	$ 8,310,737
Lease incentive asset	487,141	507,161
Investment in unconsolidated affiliate	816,756	810,066
Cash and cash equivalents	8,056	626,385
Prepaid expenses and other assets	22,237	25,525
Above market lease, asset	38,293	39,867
Operating lease right-of-use assets	278,102	280,565
Total assets	10,431,106	10,600,306
Liabilities
Debt, net	4,216,877	4,168,959
Due to MGM Resorts International and affiliates	172	316
Accounts payable, accrued expenses and other liabilities	57,543	124,109
Accrued interest	55,685	48,505
Dividend and distribution payable	140,765	136,484
Deferred revenue	221,542	156,760
Deferred income taxes, net	41,217	33,298
Operating lease liabilities	337,460	341,133
Total liabilities	5,071,261	5,009,564
Commitments and contingencies (Note 13)
Shareholders' equity
Class A shares: no par value, 1,000,000,000 shares authorized, 156,750,325 and 131,459,651 shares issued and outstanding as of December 31, 2021 and December 31, 2020, respectively	0	0
Additional paid-in capital	3,735,727	3,114,331
Accumulated deficit	(537,715)	(422,897)
Accumulated other comprehensive loss	(41,189)	(51,197)
Total Class A shareholders' equity	3,156,823	2,640,237
Noncontrolling interest	2,203,022	2,950,505
Total shareholders' equity	5,359,845	5,590,742
Partners’ capital
Total liabilities and shareholders' equity	10,431,106	10,600,306
MGP Operating Partnership
ASSETS
Real estate investments, net	8,780,521	8,310,737
Lease incentive asset	487,141	507,161
Investment in unconsolidated affiliate	816,756	810,066
Cash and cash equivalents	8,056	626,385
Prepaid expenses and other assets	22,237	25,525
Above market lease, asset	38,293	39,867
Operating lease right-of-use assets	278,102	280,565
Total assets	10,431,106	10,600,306
Liabilities
Debt, net	4,216,877	4,168,959
Due to MGM Resorts International and affiliates	172	316
Accounts payable, accrued expenses and other liabilities	57,543	124,109
Accrued interest	55,685	48,505
Dividend and distribution payable	140,765	136,484
Deferred revenue	221,542	156,760
Deferred income taxes, net	41,217	33,298
Operating lease liabilities	337,460	341,133
Total liabilities	5,071,261	5,009,564
Commitments and contingencies (Note 13)
Partners’ capital
General partner	0	0
Limited partners: 268,123,082 and 279,966,531 Operating Partnership units issued and outstanding as of December 31, 2021 and December 31, 2020, respectively.	5,359,845	5,590,742
Total partners’ capital	5,359,845	5,590,742
Total liabilities and shareholders' equity	$ 10,431,106	$ 10,600,306

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - shares	Dec. 31, 2021	Dec. 31, 2020
MGP Operating Partnership
Units Issued (in shares)	268,123,082	279,966,531
Units Outstanding (in shares)	268,123,082	279,966,531
Class A Shares
Common stock, shares authorized (in shares)	1,000,000,000	1,000,000,000
Common stock, shares issued (in shares)	156,750,325	131,459,651
Common stock, shares outstanding (in shares)	156,750,325	131,459,651

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenues
Total revenues	$ 782,063	$ 792,597	$ 881,078
Expenses
Depreciation	235,485	236,853	294,705
Property transactions, net	1,710	195,182	10,844
Ground lease expense	23,648	23,681	23,681
Acquisition-related expenses	7,500	980	10,165
General and administrative	18,055	16,076	16,516
Total Expenses	286,398	472,772	355,911
Non-operating income (expense)
Income from unconsolidated affiliate	100,824	89,056	0
Interest income	593	4,345	3,219
Interest expense	(265,942)	(228,786)	(249,944)
Gain (loss) on unhedged interest rate swaps, net	39,071	4,664	(3,880)
Other	(1,643)	(18,999)	(7,615)
Non-operating income (expense)	(127,097)	(149,720)	(258,220)
Income from continuing operations before income taxes	368,568	170,105	266,947
Provision for income taxes	(9,328)	(9,734)	(7,598)
Income from continuing operations, net of tax	359,240	160,371	259,349
Income from discontinued operations, net of tax - basic and diluted	0	0	16,216
Net income	359,240	160,371	275,565
Less: Net income attributable to noncontrolling interest	(153,737)	(84,242)	(185,305)
Net income attributable to Class A shareholders	$ 205,503	$ 76,129	$ 90,260
Weighted average Class A shares outstanding:
Basic (in shares)	151,000	129,491	93,047
Diluted (in shares)	151,194	129,653	93,299
Rental revenue
Revenues
Total revenues	$ 757,941	$ 768,442	$ 856,421
Ground lease and other
Revenues
Total revenues	24,122	24,155	24,657
MGP Operating Partnership
Revenues
Total revenues	782,063	792,597	881,078
Expenses
Depreciation	235,485	236,853	294,705
Property transactions, net	1,710	195,182	10,844
Ground lease expense	23,648	23,681	23,681
Acquisition-related expenses	7,500	980	10,165
General and administrative	18,055	16,076	16,516
Total Expenses	286,398	472,772	355,911
Non-operating income (expense)
Income from unconsolidated affiliate	100,824	89,056	0
Interest income	593	4,345	3,219
Interest expense	(265,942)	(228,786)	(249,944)
Gain (loss) on unhedged interest rate swaps, net	39,071	4,664	(3,880)
Other	(1,643)	(18,999)	(7,615)
Non-operating income (expense)	(127,097)	(149,720)	(258,220)
Income from continuing operations before income taxes	368,568	170,105	266,947
Provision for income taxes	(9,328)	(9,734)	(7,598)
Income from continuing operations, net of tax	359,240	160,371	259,349
Income from discontinued operations, net of tax - basic and diluted	0	0	16,216
Net income	$ 359,240	$ 160,371	$ 275,565
Weighted average units outstanding:
Basic (in units)	269,674	310,688	293,885
Diluted (in units)	269,868	310,850	294,137
Net income per Operating Partnership unit (basic) (in dollars per share)	$ 1.33	$ 0.52	$ 0.94
Net income per Operating Partnership unit (diluted) (in dollars per share)	1.33	0.52	0.94
MGP Operating Partnership \| Continuing Operations
Weighted average units outstanding:
Net income per Operating Partnership unit (basic) (in dollars per share)	1.33	0.52	0.88
Net income per Operating Partnership unit (diluted) (in dollars per share)	1.33	0.52	0.88
MGP Operating Partnership \| Discontinued Operations
Weighted average units outstanding:
Net income per Operating Partnership unit (basic) (in dollars per share)	0	0	0.06
Net income per Operating Partnership unit (diluted) (in dollars per share)	$ 0	$ 0	$ 0.06
MGP Operating Partnership \| Rental revenue
Revenues
Total revenues	$ 757,941	$ 768,442	$ 856,421
MGP Operating Partnership \| Ground lease and other
Revenues
Total revenues	$ 24,122	$ 24,155	$ 24,657
Class A Shares
Earnings per Class A share
Income from continuing operations per Class A share (basic) (in dollars per share)	$ 1.36	$ 0.59	$ 0.92
Income from discontinued operations per Class A share (basic) (in dollars per share)	0	0	0.05
Earnings per Class A share (basic) (in dollars per share)	1.36	0.59	0.97
Income from continuing operations per Class A share (diluted) (in dollars per share)	1.36	0.59	0.92
Income from discontinued operations per Class A share (diluted) (in dollars per share)	0	0	0.05
Earnings per Class A share (diluted) (in dollars per share)	$ 1.36	$ 0.59	$ 0.97

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Net income	$ 359,240	$ 160,371	$ 275,565
Unrealized gain (loss) on cash flow hedges	38,578	(89,624)	(35,198)
Comprehensive income	397,818	70,747	240,367
Less: Comprehensive income attributable to noncontrolling interests	(171,250)	(29,455)	(159,639)
Comprehensive income attributable to Class A shareholders	226,568	41,292	80,728
MGP Operating Partnership
Net income	359,240	160,371	275,565
Unrealized gain (loss) on cash flow hedges	38,578	(89,624)	(35,198)
Comprehensive income	$ 397,818	$ 70,747	$ 240,367

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities
Net income	$ 359,240	$ 160,371	$ 275,565
Adjustments to reconcile net income to net cash provided by operating activities:
Income from discontinued operations, net	0	0	(16,216)
Depreciation	235,485	236,853	294,705
Property transactions, net	1,710	195,182	10,844
Amortization of financing costs	11,449	10,024	12,733
Loss on retirement of debt	0	18,129	6,161
Non-cash ground lease, net	1,038	1,036	1,038
Deemed contributions - tax sharing agreement	1,134	6,172	7,008
Straight-line rental revenues, excluding amortization of lease incentive asset	66,293	51,679	41,447
Amortization of lease incentive asset	20,020	20,020	16,360
Amortization of deferred revenue on non-normal tenant improvements	(1,511)	(1,511)	(2,013)
Amortization of cash flow hedges	22,200	9,993	0
(Gain) loss on unhedged interest rate swaps, net	(39,071)	(4,664)	3,880
Share-based compensation	4,827	2,854	2,277
Deferred income taxes	7,919	3,389	(3,725)
Income from unconsolidated affiliate	(100,824)	(89,056)	0
Distributions from unconsolidated affiliate	94,134	80,990	0
Park MGM Transaction	0	0	(605,625)
Distributions received from discontinued operations and other	0	0	40,165
Change in operating assets and liabilities:
Prepaid expenses and other assets	(1,151)	352	363
Due to MGM Resorts International and affiliates	(144)	(458)	547
Accounts payable, accrued expenses and other liabilities	(10,908)	(3,255)	(1,616)
Accrued interest	7,180	5,601	16,808
Net cash provided by operating activities - continuing operations	679,020	703,701	100,706
Cash flows from investing activities
MGM Springfield Transaction	(400,000)	0	0
Proceeds from sale of Mandalay Bay real estate assets, net	0	58,615	0
Proceeds from Northfield OpCo Transaction	0	0	3,779
Net cash provided by (used in) investing activities - continuing operations	(400,000)	58,615	3,779
Cash flows from financing activities
Net borrowings (repayments) under bank credit facility	40,000	(1,693,750)	(1,115,375)
Proceeds from issuance of bridge loan facility	0	1,304,625	0
Proceeds from issuance of debt	0	1,550,000	750,000
Deferred financing costs	0	(20,653)	(9,983)
Repayment of assumed debt and bridge facilities	0	0	(245,950)
Proceeds from issuance of Class A shares, net	792,852	524,616	1,250,006
Redemption of Operating Partnership units	(1,181,276)	(1,400,000)	0
Dividends and distributions paid	(544,912)	(601,719)	(533,735)
Other	(4,013)	(1,151)	(1,342)
Net cash provided by (used in) financing activities - continuing operations	(897,349)	(338,032)	93,621
Cash flows from discontinued operations, net
Cash flows provided by operating activities, net	0	0	15,591
Cash flows used in investing activities, net	0	0	(12)
Cash flows used in financing activities, net	0	0	(37,900)
Net cash used in discontinued operations	0	0	(22,321)
Change in cash and cash equivalents classified as assets held for sale	0	0	(22,321)
Cash and cash equivalents
Net increase (decrease) for the period	(618,329)	424,284	198,106
Balance, beginning of period	626,385	202,101	3,995
Balance, end of period	8,056	626,385	202,101
Supplemental cash flow disclosures
Interest paid	225,113	203,168	220,616
Non-cash investing and financing activities
Accrual of dividend and distribution payable to Class A shareholders and Operating Partnership unit holders	140,765	136,484	147,349
MGP BREIT Venture assumption of bridge loan facility	0	1,304,625	0
Northfield OpCo
Non-cash investing and financing activities
Redemption of Operating Partnership units relating to Northfield OpCo Transaction	0	0	301,373
Empire City Casino
Non-cash investing and financing activities
Empire City Transaction assets acquired	0	0	625,000
MGP BREIT Venture Transaction
Non-cash investing and financing activities
Investment in MGP BREIT Venture	0	802,000	0
MGP Operating Partnership
Cash flows from operating activities
Net income	359,240	160,371	275,565
Adjustments to reconcile net income to net cash provided by operating activities:
Income from discontinued operations, net	0	0	(16,216)
Depreciation	235,485	236,853	294,705
Property transactions, net	1,710	195,182	10,844
Amortization of financing costs	11,449	10,024	12,733
Loss on retirement of debt	0	18,129	6,161
Non-cash ground lease, net	1,038	1,036	1,038
Deemed contributions - tax sharing agreement	1,134	6,172	7,008
Straight-line rental revenues, excluding amortization of lease incentive asset	66,293	51,679	41,447
Amortization of lease incentive asset	20,020	20,020	16,360
Amortization of deferred revenue on non-normal tenant improvements	(1,511)	(1,511)	(2,013)
Amortization of cash flow hedges	22,200	9,993	0
(Gain) loss on unhedged interest rate swaps, net	(39,071)	(4,664)	3,880
Share-based compensation	4,827	2,854	2,277
Deferred income taxes	7,919	3,389	(3,725)
Income from unconsolidated affiliate	(100,824)	(89,056)	0
Distributions from unconsolidated affiliate	94,134	80,990	0
Park MGM Transaction	0	0	(605,625)
Distributions received from discontinued operations and other	0	0	40,165
Change in operating assets and liabilities:
Prepaid expenses and other assets	(1,151)	352	363
Due to MGM Resorts International and affiliates	(144)	(458)	547
Accounts payable, accrued expenses and other liabilities	(10,908)	(3,255)	(1,616)
Accrued interest	7,180	5,601	16,808
Net cash provided by operating activities - continuing operations	679,020	703,701	100,706
Cash flows from investing activities
MGM Springfield Transaction	(400,000)	0	0
Proceeds from sale of Mandalay Bay real estate assets, net	0	58,615	0
Proceeds from Northfield OpCo Transaction	0	0	3,779
Net cash provided by (used in) investing activities - continuing operations	(400,000)	58,615	3,779
Cash flows from financing activities
Net borrowings (repayments) under bank credit facility	40,000	(1,693,750)	(1,115,375)
Proceeds from issuance of bridge loan facility	0	1,304,625	0
Proceeds from issuance of debt	0	1,550,000	750,000
Deferred financing costs	0	(20,653)	(9,983)
Repayment of assumed debt and bridge facilities	0	0	(245,950)
Proceeds from issuance of Class A shares, net	792,852	524,616	1,250,006
Redemption of Operating Partnership units	(1,181,276)	(1,400,000)	0
Dividends and distributions paid	(544,912)	(601,719)	(533,735)
Other	(4,013)	(1,151)	(1,342)
Net cash provided by (used in) financing activities - continuing operations	(897,349)	(338,032)	93,621
Cash flows from discontinued operations, net
Cash flows provided by operating activities, net	0	0	15,591
Cash flows used in investing activities, net	0	0	(12)
Cash flows used in financing activities, net	0	0	(37,900)
Net cash used in discontinued operations	0	0	(22,321)
Change in cash and cash equivalents classified as assets held for sale	0	0	(22,321)
Cash and cash equivalents
Net increase (decrease) for the period	(618,329)	424,284	198,106
Balance, beginning of period	626,385	202,101	3,995
Balance, end of period	8,056	626,385	202,101
Supplemental cash flow disclosures
Interest paid	225,113	203,168	220,616
Non-cash investing and financing activities
Accrual of dividend and distribution payable to Class A shareholders and Operating Partnership unit holders	140,765	136,484	147,349
MGP BREIT Venture assumption of bridge loan facility	0	1,304,625	0
MGP Operating Partnership \| Northfield OpCo
Non-cash investing and financing activities
Redemption of Operating Partnership units relating to Northfield OpCo Transaction	0	0	301,373
MGP Operating Partnership \| Empire City Casino
Non-cash investing and financing activities
Empire City Transaction assets acquired	0	0	625,000
MGP Operating Partnership \| MGP BREIT Venture Transaction
Non-cash investing and financing activities
Investment in MGP BREIT Venture	$ 0	$ 802,000	$ 0

Consolidated Statements of Shar

Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands		Total	Total Class A Shareholders' Equity	Class A Shares	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interest	Empire City	Empire CityTotal Class A Shareholders' Equity	Empire CityAdditional Paid-in Capital	Empire CityAccumulated Other Comprehensive Income (Loss)	Empire CityNoncontrolling Interest	Park MGM	Park MGMTotal Class A Shareholders' Equity	Park MGMAdditional Paid-in Capital	Park MGMAccumulated Other Comprehensive Income (Loss)	Park MGMNoncontrolling Interest	MGM Springfield	MGM SpringfieldTotal Class A Shareholders' Equity	MGM SpringfieldAdditional Paid-in Capital	MGM SpringfieldNoncontrolling Interest
Balance at Dec. 31, 2018		$ 5,845,506	$ 1,565,971	$ 0	$ 1,712,671	$ (150,908)	$ 4,208	$ 4,279,535
Balance (in shares) at Dec. 31, 2018				70,911,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		275,565	90,260			90,260		185,305
Issuance of Class A shares		1,250,006	1,049,582		1,051,094		(1,512)	200,424
Issuance of Class A shares (in shares)				42,819,000
Redemption of temporary equity			0
Transactions									$ 379,050	$ 23,745	$ 23,940	$ (195)	$ 355,305	$ 31,875	$ 2,496	$ 2,512	$ (16)	$ 29,379
Northfield OpCo Transaction		(298,957)	(27,439)		(27,441)		2	(271,518)
Cash flow hedges		(35,198)	(9,532)				(9,532)	(25,666)
Share-based compensation		2,277	728		728			1,549
Deemed contribution - tax sharing agreement		7,008						7,008
Dividends and distributions declared		(562,029)	(183,733)			(183,733)		(378,296)
Other (in shares)				77,000
Other		2,909	2,821		2,821			88
Balance at Dec. 31, 2019		6,898,012	2,514,899	$ 0	2,766,325	(244,381)	(7,045)	4,383,113
Balance (in shares) at Dec. 31, 2019				113,807,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		160,371
Net income	[1]	148,292	76,129			76,129		72,163
Issuance of Class A shares	[1]	506,198	442,717		443,363		(646)	63,481
Issuance of Class A shares (in shares)	[1]			17,524,000
MGP BREIT Venture Transaction	[1]	63,904	8,287		8,228		59	55,617
Redemption of temporary equity	[1]	(7,532)	(114,924)		(106,151)		(8,773)	107,392
Reclassification and remeasurements of temporary equity	[1]	(1,405,058)						(1,405,058)
Cash flow hedges	[1]	(76,629)	(34,837)				(34,837)	(41,792)
Share-based compensation	[1]	2,562	1,200		1,200			1,362
Deemed contribution - tax sharing agreement	[1]	5,125						5,125
Dividends and distributions declared	[1]	(543,966)	(254,645)			(254,645)		(289,321)
Other (in shares)	[1]			129,000
Other	[1]	(166)	1,411		1,366		45	(1,577)
Balance at Dec. 31, 2020		5,590,742	2,640,237	$ 0	3,114,331	(422,897)	(51,197)	2,950,505
Balance (in shares) at Dec. 31, 2020				131,460,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		359,240	205,503			205,503		153,737
Issuance of Class A shares		792,852	656,361		660,533		(4,172)	136,491
Issuance of Class A shares (in shares)				25,102,000
Redemption of temporary equity			0
Redemption of Operating Partnership units		(1,181,276)	(227,487)		(220,627)		(6,860)	(953,789)
Transactions																			$ 295,560	$ 172,749	$ 172,749	$ 122,811
Cash flow hedges		38,578	21,065				21,065	17,513
Share-based compensation		4,827	2,752		2,752			2,075
Deemed contribution - tax sharing agreement		1,134						1,134
Dividends and distributions declared		(549,194)	(320,321)			(320,321)		(228,873)
Other (in shares)				188,000
Other		7,382	5,964		5,989		(25)	1,418
Balance at Dec. 31, 2021		$ 5,359,845	$ 3,156,823	$ 0	$ 3,735,727	$ (537,715)	$ (41,189)	$ 2,203,022
Balance (in shares) at Dec. 31, 2021				156,750,000

[1]	Excludes amounts attributable to redeemable noncontrolling interest. See Note 2.

Consolidated Statements of Sh_2

Consolidated Statements of Shareholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Stockholders' Equity [Abstract]
Dividend declared (in dollars per share)	$ 2.0550	$ 1.9375	$ 1.8725

Consolidated Statements of Part

Consolidated Statements of Partners' Capital - USD ($) $ in Thousands		Total		MGP Operating Partnership		MGP Operating PartnershipEmpire City	MGP Operating PartnershipPark MGM	MGP Operating PartnershipMGM Springfield	MGP Operating PartnershipGeneral Partner	MGP Operating PartnershipLimited Partners		MGP Operating PartnershipLimited PartnersEmpire City	MGP Operating PartnershipLimited PartnersPark MGM	MGP Operating PartnershipLimited PartnersMGM Springfield
Beginning balance at Dec. 31, 2018				$ 5,845,506					$ 0	$ 5,845,506
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income		$ 275,565		275,565						275,565
Proceeds from issuance of Class A shares by MGP				1,250,006						1,250,006
Transactions						$ 379,050	$ 31,875					$ 379,050	$ 31,875
Northfield OpCo Transaction				(298,957)						(298,957)
Cash flow hedges		(35,198)		(35,198)						(35,198)
Share-based compensation		2,277		2,277						2,277
Deemed contribution - tax sharing agreement		7,008		7,008						7,008
Dividends and distributions declared				(562,029)						(562,029)
Other				2,909						2,909
Ending balance at Dec. 31, 2019				6,898,012					0	6,898,012
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income		160,371		160,371
Net income		148,292	[1]	148,292	[2]					148,292	[2]
Proceeds from issuance of Class A shares by MGP	[2]			506,198						506,198
MGP BREIT Venture Transaction	[2]			63,904						63,904
Redemption of temporary equity		(7,532)	[1]	(7,532)	[2]					(7,532)	[2]
Reclassification and remeasurements of temporary equity		(1,405,058)	[1]	(1,405,058)	[2]					(1,405,058)	[2]
Cash flow hedges		(89,624)		(89,624)
Cash flow hedges	[2]			(76,629)						(76,629)
Share-based compensation		2,562	[1]	2,562	[2]					2,562	[2]
Deemed contribution - tax sharing agreement		5,125	[1]	5,125	[2]					5,125	[2]
Dividends and distributions declared	[2]			(543,966)						(543,966)
Other	[2]			(166)						(166)
Ending balance at Dec. 31, 2020				5,590,742					0	5,590,742
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income		359,240		359,240						359,240
Proceeds from issuance of Class A shares by MGP				792,852						792,852
Transactions								$ 295,560						$ 295,560
Redemption of Operating Partnership units				(1,181,276)						(1,181,276)
Cash flow hedges		38,578		38,578						38,578
Share-based compensation		4,827		4,827						4,827
Deemed contribution - tax sharing agreement		$ 1,134		1,134						1,134
Dividends and distributions declared				(549,194)						(549,194)
Other				7,382						7,382
Ending balance at Dec. 31, 2021				$ 5,359,845					$ 0	$ 5,359,845

[1]	Excludes amounts attributable to redeemable noncontrolling interest. See Note 2.
[2]	Excludes amounts attributable to redeemable noncontrolling interest. See Note 2.

Consolidated Statements of Pa_2

Consolidated Statements of Partners' Capital (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Dividend declared (in dollars per share)	$ 2.0550	$ 1.9375	$ 1.8725
MGP Operating Partnership
Dividend declared (in dollars per share)	$ 2.0550	$ 1.9375	$ 1.8725

Business

Business	12 Months Ended
Business	Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
BUSINESS	BUSINESS Organization. MGM Growth Properties LLC (“MGP” or the “Company”) is a limited liability company that was organized in Delaware in October 2015. MGP conducts its operations through MGM Growth Properties Operating Partnership LP (the “Operating Partnership”), a Delaware limited partnership that was formed in January 2016 and became a subsidiary of MGP in April 2016. The Company elected to be taxed as a real estate investment trust (“REIT”) commencing with its taxable year ended December 31, 2016. MGP is organized in an umbrella partnership REIT (commonly referred to as an “UPREIT”) structure in which substantially all of its assets are owned by and substantially all of its business is conducted through the Operating Partnership, which is owned by MGP, MGM Resorts International (“MGM”), and subsidiaries of MGM, and whose sole general partner is one of MGP’s subsidiaries. MGP has two classes of authorized and outstanding voting common shares (collectively, the “shares”): Class A shares and a single Class B share. The Class B share is a non-economic interest in MGP which does not provide its holder any rights to profits or losses or any rights to receive distributions from the operations of MGP or upon liquidation or winding up of MGP but which represents a majority of the voting power of MGP’s shares. MGM holds a controlling interest in MGP through its ownership of MGP’s Class B share, but does not hold any of MGP’s Class A shares. The Class B share structure was put in place to align MGM’s voting rights in MGP with its economic interest in the Operating Partnership. MGM will no longer be entitled to the voting rights provided by the Class B share if MGM and its controlled affiliates’ (excluding MGP and its subsidiaries) aggregate beneficial ownership of the combined economic interests in MGP and the Operating Partnership falls below 30%. The operating agreement provides that MGM may only transfer the Class B share (other than transfers to us and MGM’s controlled affiliates) if and to the extent that such transfer is approved by an independent conflicts committee, not to be unreasonably withheld. No par value is attributed to MGP’s Class A and Class B shares. As of December 31, 2021, there were approximately 268.1 million Operating Partnership units outstanding in the Operating Partnership of which MGM owned approximately 111.4 million, or 41.5%, and MGP owned the remaining 58.5%. MGM’s Operating Partnership units are exchangeable into Class A shares of MGP on a one-to-one basis, or cash at the Fair Market Value of a Class A share (as defined in the Operating Partnership’s partnership agreement). The determination of settlement method is at the option of MGP’s independent conflicts committee. MGM’s indirect ownership of these Operating Partnership units is recognized as a noncontrolling interest in MGP’s financial statements. A wholly owned subsidiary of MGP is the general partner of the Operating Partnership and operates and controls all of its business affairs. As a result, MGP consolidates the Operating Partnership and its subsidiaries. MGP is a publicly traded REIT engaged through its investment in the Operating Partnership in the acquisition, ownership and leasing of large-scale destination entertainment and leisure resorts, whose tenants generally offer diverse amenities including casino gaming, hotel, convention, dining, entertainment and retail offerings. A wholly owned subsidiary of the Operating Partnership leases its real estate properties back to a wholly owned subsidiary of MGM under a master lease agreement (the “MGM-MGP Master Lease”) and as further discussed below, an unconsolidated affiliate of the Operating Partnership leases its real properties back to a wholly owned subsidiary of MGM under a master lease agreement. Empire City Transaction On January 29, 2019, the Company acquired the developed real property associated with Empire City Casino (“Empire City”) from MGM upon its acquisition of Empire City (“Empire City Transaction”) and Empire City was added to the MGM-MGP Master Lease. Refer to Note 3 for additional details on the Empire City Transaction and Note 6 for further discussion on the MGM-MGP Master Lease. Park MGM Transaction On March 7, 2019, the Company entered into an amendment to the MGM-MGP Master Lease with respect to improvements made by MGM relating to the rebranding of the Park MGM and NoMad Las Vegas property (the “Park MGM Transaction”). Refer to Note 6 for further discussion on the MGM-MGP Master Lease and the Park MGM Transaction. Northfield OpCo Transaction On April 1, 2019, the Company transferred the membership interests of Northfield Park Associates, LLC (“Northfield”), the entity that formerly owned the real estate assets and operations of the Hard Rock Rocksino Northfield Park in Northfield, Ohio, to a subsidiary of MGM, and the Company retained the real estate assets. The Company’s taxable REIT subsidiary (“TRS”) that owned Northfield liquidated immediately prior to the transfer. Subsequently, MGM rebranded the operations it acquired (“Northfield OpCo”) to MGM Northfield Park, which was added to the MGM-MGP Master Lease (the collective transactions, the “Northfield OpCo Transaction”). Refer to Note 3 for additional details on the Northfield OpCo Transaction and Note 6 for further discussion on the MGM-MGP Master Lease. MGP BREIT Venture Transaction On February 14, 2020, the Operating Partnership and MGM completed a series of transactions (collectively the “MGP BREIT Venture Transaction”) pursuant to which MGM transferred the real estate assets of MGM Grand Las Vegas to the Operating Partnership and, together with real estate assets of Mandalay Bay (including Mandalay Place), were contributed to a newly formed entity (“MGP BREIT Venture”), which, following the transactions, is owned 50.1% by the Operating Partnership and 49.9% by a subsidiary of Blackstone Real Estate Income Trust, Inc. (“BREIT”). In exchange for the contribution of the Mandalay Bay real estate assets, the Operating Partnership received consideration of $2.1 billion, which was comprised of $1.3 billion of the Operating Partnership’s secured indebtedness assumed by MGM BREIT Venture, the Operating Partnership’s 50.1% equity interest in the MGP BREIT Venture, and the remainder in cash. In addition, MGM received approximately $2.4 billion of cash distributed from the MGP BREIT Venture as consideration for its contribution of the MGM Grand Las Vegas real estate assets, and, additionally, the Operating Partnership issued 2.6 million Operating Partnership units to MGM representing 5% of the equity value of the MGP BREIT Venture. MGM provides a shortfall guarantee of the principal amount of indebtedness of the MGP BREIT Venture (and any interest accrued and unpaid thereto). On the closing date, BREIT also purchased 4.9 million Class A common shares of MGP for $150 million. Refer to Note 5 for additional details on the MGP BREIT Venture. In connection with the transactions, MGP BREIT Venture entered into a lease with a subsidiary of MGM for the real estate assets of Mandalay Bay and MGM Grand Las Vegas. The lease (the “MGP BREIT Venture Lease”) provides for a term of 30 years with two ten-year renewal options and has an initial annual base rent of $292 million, escalating annually at a rate of 2% per annum for the first fifteen years and thereafter equal to the greater of 2% and the consumer price index increase during the prior year subject to a cap of 3%. In addition, the lease obligates the tenant to spend a specified percentage of net revenues at the properties on capital expenditures and that the tenant and MGM to comply with certain financial covenants, which, if not met, would require the tenant to maintain cash security or provide one or more letters of credit in favor of the landlord in an amount equal to the rent for the succeeding one-year period. MGM provides a guarantee of the tenant’s obligations under the lease. In connection with the MGP BREIT Venture Transaction, the MGM-MGP Master Lease was modified to remove the Mandalay Bay property and the annual cash rent under the MGM-MGP Master Lease was reduced by $133 million. Refer to Note 6 for additional details on the modification to the MGM-MGP Master Lease. Also, on January 14, 2020, the Operating Partnership, MGP, and MGM entered into an agreement for the Operating Partnership to waive its right to issue MGP Class A shares, in lieu of cash, to MGM in connection with MGM exercising its right to require the Operating Partnership to redeem Operating Partnership units it holds. The waiver provided that the units would be purchased at a price per unit equal to a 3% discount to the applicable cash amount as calculated in accordance with the operating agreement. The waiver was effective upon closing of the transaction on February 14, 2020 and scheduled to terminate on the earlier of February 14, 2022 or MGM receiving cash proceeds of $1.4 billion as consideration for the redemption of its Operating Partnership units. On May 18, 2020, the Operating Partnership redeemed 30.3 million of Operating Partnership units held by MGM for $700 million, or $23.10 per unit, and on December 2, 2020, the Operating Partnership redeemed 23.5 million of Operating Partnership units held by MGM for the remaining $700 million, or $29.78 per unit. As a result, the waiver has terminated in accordance with its terms. Refer to Note 2 for further discussion of redeemable equity. Operating Partnership Unit Redemption - 2021 On March 4, 2021, certain subsidiaries of MGM delivered a notice of redemption to the Company covering approximately 37.1 million Operating Partnership units that they held which was satisfied with aggregate cash proceeds of approximately $1.2 billion, using cash on hand together with the proceeds from the issuance of Class A shares. Refer to Note 10 for further discussion. VICI Transaction On August 4, 2021, the Company and the Operating Partnership entered into an agreement with VICI Properties, Inc. (“VICI”) and MGM whereby VICI will acquire the Company in a stock-for-stock transaction (such transaction, the “VICI Transaction”). Pursuant to the agreement, MGP Class A shareholders will have the right to receive 1.366 shares of newly issued VICI stock in exchange for each MGP Class A share outstanding and MGM will have the right to receive 1.366 units of the new VICI operating partnership (“VICI OP”) in exchange for each Operating Partnership unit held by MGM. The fixed exchange ratio represents an agreed upon price of $43 per share of MGP Class A share to the five-day volume weighted average price of VICI stock as of the close of business on July 30, 2021. In connection with the exchange, VICI OP will redeem the majority of MGM’s VICI OP units for cash consideration of $4.4 billion, with MGM retaining approximately 12.2 million VICI OP units. MGP’s Class B share that is held by MGM will be cancelled. The transaction is expected to close in the first half of 2022, subject to customary closing conditions, regulatory approvals, and approval by VICI stockholders (which was received on October 29, 2021). MGM Springfield Transaction On October 29, 2021, the Company acquired the real estate assets of MGM Springfield from MGM for $400 million of cash consideration (such transaction, the “MGM Springfield Transaction”). MGM Springfield was added to the MGM-MGP Master Lease between the Company and MGM. Following the closing of the transaction, the annual rent payment under the MGM-MGP Master Lease increased by $30 million, $27.0 million of which is fixed and contractually grows at 2% per year with escalators subject to the tenant and, without duplication, the MGM operating subsidiary sublessees of the tenant, collectively meeting an adjusted net revenue to rent ratio. Final regulatory approvals, which were not necessary for the transaction to close, are expected to be received within nine to twelve months following the close of the transaction. Until final regulatory approvals are obtained, the parties will be subject to a trust agreement, which will provide for the property to be placed into a trust (or, at MGM’s option, be returned to MGM) during the interim period in the event that the regulator finds reasonable cause to believe that the Company may not be found suitable. The property will then remain in trust until a final determination regarding the Company’s suitability is made. Refer to Note 3 for further discussion. The Mirage Transaction

Basis of Presentation and Summa

Basis of Presentation and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2021
Accounting Policies [Abstract]
BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES	BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES Basis of presentation. The accompanying consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) set forth in the Accounting Standards Codification (“ASC”), as published by the Financial Accounting Standards Board (“FASB”), and with the applicable rules and regulations of the Securities and Exchange Commission (“SEC”). The accompanying consolidated financial statements of MGP and the Operating Partnership represent the results of operations, financial positions and cash flows of MGP and the Operating Partnership, including their respective subsidiaries. Principles of consolidation. The Company identifies entities for which control is achieved through means other than voting rights and to determine which business enterprise is the primary beneficiary of variable interest entities (“VIE”). A VIE is an entity in which either (i) the equity investors as a group, if any, lack the power through voting or similar rights to direct the activities of such entity that most significantly impact such entity’s economic performance or (ii) the equity investment at risk is insufficient to finance that entity’s activities without additional subordinated financial support. The Company identifies the primary beneficiary of a VIE as the enterprise that has both of the following characteristics: (i) the power to direct the activities of the VIE that most significantly impact the entity’s economic performance; and (ii) the obligation to absorb losses or receive benefits of the VIE that could potentially be significant to the entity. The Company consolidates its investment in a VIE when it determines that it is its primary beneficiary. The Company may change its original assessment of a VIE upon subsequent events such as the modification of contractual arrangements that affect the characteristics or adequacy of the entity’s equity investments at risk and the disposition of all or a portion of an interest held by the primary beneficiary. The Company performs this analysis on an ongoing basis. The consolidated financial statements of MGP include the accounts of the Operating Partnership, a VIE of which the Company is the primary beneficiary, as well as its wholly owned and majority-owned subsidiaries, which represents all of MGP’s assets and liabilities. As MGP holds what is deemed a majority voting interest in the Operating Partnership through its ownership of the Operating Partnership’s sole general partner, it qualifies for the exemption from providing certain of the required disclosures associated with investments in VIEs. The consolidated financial statements of the Operating Partnership include the accounts of its wholly owned subsidiary, MGP Lessor LLC, which is the MGM-MGP Master Lease landlord, a VIE of which the Operating Partnership is the primary beneficiary. As of December 31, 2021, on a consolidated basis, MGP Lessor, LLC had total assets of $8.9 billion primarily related to its real estate investments and total liabilities of $599.9 million primarily related to its deferred revenue and operating lease liabilities. For entities determined not to be VIEs, the Company consolidates such entities in which the Company owns 100% of the equity. For entities in which the Company owns less than 100% of the equity interest, the Company consolidates the entity under the voting interest model if it has controlling financial interest based upon the terms of the respective entities’ ownership agreements. If the entity does not qualify for consolidation under the voting interest model and the Company has significant influence over the operating and financial decisions of the entity, the Company accounts for the entity under the equity method, such as the Company’s MGP BREIT Venture, which does not qualify for consolidation as the Company has joint control, given the entity is structured with substantive participating rights whereby both owners participate in the decision making process which prevents the Company from exerting a controlling financial interest, as defined in ASC 810. Noncontrolling interest. MGP presents noncontrolling interest and classifies such interest as a component of consolidated shareholders’ equity, separate from the Company’s Class A shareholders’ equity. Noncontrolling interest in MGP represents Operating Partnership units currently held by subsidiaries of MGM. Comprehensive income or loss of the Operating Partnership is allocated to its noncontrolling interest based on the noncontrolling interest’s ownership percentage in the Operating Partnership except for income tax expenses as discussed in Note 9. Ownership percentage is calculated by dividing the number of Operating Partnership units held by the noncontrolling interest by the total Operating Partnership units held by the noncontrolling interest and the Company. Issuance of additional Class A shares and Operating Partnership units changes the ownership interests of both the noncontrolling interest and the Company. Such transactions and the related proceeds are treated as capital transactions. MGM may tender its Operating Partnership units for redemption by the Operating Partnership in exchange for cash equal to the market price of MGP’s Class A shares at the time of redemption or for unregistered Class A shares on a one-for-one basis. Such election to pay cash or issue Class A shares to satisfy an Operating Partnership unitholder’s redemption request is solely within the control of MGP’s independent conflicts committee. Refer to Note 1 above and to “Redeemable noncontrolling interest and redeemable capital” below for discussion of a waiver agreement relating to MGM’s cash redemption of Operating Partnership units. Use of estimates. The consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America. These principles require the Company’s management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Redeemable noncontrolling interest and redeemable capital. As discussed in Note 1, on January 14, 2020 the Operating Partnership agreed to waive its right following the closing of the MGP BREIT Venture Transaction to issue MGP Class A shares, in lieu of cash, to settle redemptions of Operating Partnership units held by MGM up to a maximum cash redemption amount of $1.4 billion. In connection with the waiver, the Operating Partnership and the Company reclassified, from permanent equity to temporary equity, the carrying value of Operating Partnership units that could require cash redemption and remeasured the units to their redemption value. The Operating Partnership units that comprised the $1.4 billion redemption amount were determined based on a 3% discount to the ten-day average closing price prior to the date of determination. At each subsequent reporting period, the carrying value of temporary equity was remeasured to the greater of: (1) the carrying value of the number of units then considered redeemable, inclusive of the comprehensive income and losses attributed based on a per unit or share basis in accordance with ASC 810 or (2) the redemption value of the number of units that are then redeemable based on the remaining aggregate cash redemption amount and the per share redemption value, except that decreases in the per unit or share redemption were limited to the amount of previous increases, with the differences between the carrying value and the remeasured value being recorded as an adjustment in additional paid-in capital (in lieu of retained earnings) or limited partners’ capital. The $1.4 billion maximum cash redemption amount was completed by the $700 million redeemed on May 18, 2020 and the $700 million redeemed on December 2, 2020. The components of equity that related to the Company’s redeemable noncontrolling interest and the Operating Partnership’s redeemable capital were as follows: (in thousands) As of January 14, 2020 $ — Reclassification and remeasurement adjustments 1,405,058 Attribution of: Net income 12,079 Redemption of temporary equity (1,392,468) MGP's issuance of Class A shares and Operating Partnership's issuance of units 18,418 MGP BREIT Venture Transaction 16,136 Cash flow hedges (12,995) Share-based compensation 292 Deemed contribution - tax sharing agreement 1,047 MGP Dividends and Operating Partnership distributions declared (46,887) Other (680) As of December 31, 2020 $ — Investment in and advances to unconsolidated affiliate. The Company has an investment in an unconsolidated affiliate accounted for under the equity method, which is currently comprised of MGP BREIT Venture. Under the equity method, carrying value is adjusted for the Company’s share of the investee’s earnings and losses, as well as distributions from the investee. The Company classifies its share of investee’s earnings as a component of “Other income (expense)”, as the Company’s investment in such unconsolidated affiliate is an extension of the Company’s core business operations. The Company evaluates its investment in unconsolidated affiliate for impairment whenever events or changes in circumstances indicate that the carrying value of its investment may have experienced an “other-than-temporary” decline in value. If such conditions exist, the Company compares the estimated fair value of the investment to its carrying value to determine if an impairment is indicated and determines whether the impairment is “other-than-temporary” based on its assessment of all relevant factors, including consideration of the Company’s intent and ability to retain its investment. Real estate investments. Real estate investments consist of land, buildings, improvements and integral equipment. The majority of the Company’s real property was contributed or acquired by the Operating Partnership from MGM as transactions between entities under common control, and as a result, such real estate was initially recorded by the Company at MGM’s historical cost basis, less accumulated depreciation (i.e., there was no change in the basis of the contributed assets), as of the contribution or acquisition dates. Costs of maintenance and repairs to real estate investments are the responsibility of the tenant under the MGM-MGP Master Lease. Based upon the terms of the MGM-MGP Master Lease, although the tenant is responsible for all capital expenditures during the term of the lease, if, in the future, a deconsolidation event occurs, the Company will be required to pay the tenant, should the tenant so elect, for certain capital improvements that would not constitute “normal tenant improvements” in accordance with U.S. GAAP in effect at lease commencement (i.e. ASC 840) (“Non-Normal Tenant Improvements”), subject to an initial cap of $100 million in the first year of the lease increasing annually by $75 million each year thereafter. The Company will be entitled to receive additional rent based on the 10-year treasury yield plus 600 basis points multiplied by the value of the new capital improvements the Company is required to pay for in connection with a deconsolidation event and such capital improvements will be subject to the terms of the lease. Examples of Non-Normal Tenant Improvements include the costs of structural elements at the properties, including capital improvements that expand the footprint or square footage of any of the properties or extend the useful life of the properties, as well as equipment that would be a necessary improvement at any of the properties, including initial installation of elevators, air conditioning systems or electrical wiring. Inception-to-date Non-Normal Tenant Improvements were $48.4 million through December 31, 2021. In accordance with accounting standards governing the impairment or disposal of long-lived assets, the carrying value of long-lived assets, including land, buildings and improvements, land improvements and integral equipment is evaluated whenever events or changes in circumstances indicate that a potential impairment has occurred relative to a given asset or assets. Factors that could result in an impairment review include, but are not limited to, a current period cash flow loss combined with a history of cash flow losses, current cash flows that may be insufficient to recover the investment in the property over the remaining useful life, a projection that demonstrates continuing losses associated with the use of a long-lived asset, significant changes in the manner of use of the assets or significant changes in business strategies. If such circumstances arise, the Company uses an estimate of the undiscounted value of expected future operating cash flows to determine whether the long-lived assets are impaired. If the aggregate undiscounted cash flows plus net proceeds expected from disposition of the assets (if any) are less than the carrying amount of the assets, the resulting impairment charge to be recorded is calculated based on the excess of the carrying value of the assets over the fair value of such assets, with the fair value determined based on an estimate of discounted future cash flows, appraisals or other valuation techniques. There were no impairment charges related to long-lived assets recognized during the years ended December 31, 2021, 2020, and 2019. Depreciation and property transactions. Depreciation expense is recognized over the useful lives of real estate investments applying the straight-line method over the following estimated useful lives, which are periodically reviewed: Buildings and building improvements 20 to 40 years Land improvements 10 to 20 years Furniture, fixtures and equipment 3 to 20 years Property transactions, net are comprised of transactions related to long-lived assets, such as gains and losses on the disposition of assets. Lease incentive asset. The Company’s lease incentive asset consists of the consideration paid to MGM as part of the Park MGM Transaction, net of the deferred revenue balance associated with Non-Normal Tenant Improvements related to Park MGM, which was derecognized. The Company amortizes the lease incentive asset as a reduction of rental revenue over the remaining term of the MGM-MGP Master Lease. Deferred revenue. The Company received nonmonetary consideration related to Non-Normal Tenant Improvements as they become MGP’s property pursuant to the MGM-MGP Master Lease and recognized the cost basis of Non-Normal Tenant Improvements as real estate investments and deferred revenue. The Company depreciates the real estate investments over their estimated useful lives and amortizes the deferred revenue as additional rental revenue over the remaining term of the MGM-MGP Master Lease once the related real estate investments were placed in service. Lessee leases. The Company determines if an arrangement is or contains a lease at inception or modification of the arrangement. An arrangement is or contains a lease if there are identified assets and the right to control the use of an identified asset is conveyed for a period in exchange for consideration. Control over the use of the identified asset means the lessee has both the right to obtain substantially all of the economic benefits from the use of the asset and the right to direct the use of the asset. For leases with terms greater than twelve months, the operating lease right-of-use (“ROU”) assets and operating lease liabilities are recognized based on the present value of the future minimum lease payments over the lease term at commencement date. The initial measurement of the operating lease ROU assets also includes any prepaid lease payments and are reduced by any previously accrued deferred rent. When available, the Company uses the rate implicit in the lease to discount lease payments to present value; however, the Company’s leases do not provide a readily determinable implicit rate. Therefore, the Company uses its incremental borrowing rate to discount the lease payments based on the information available at commencement date. Certain of the Company’s leases include fixed rental escalation clauses that are factored into the determination of lease payments. Lease terms include options to extend or terminate the lease when it is reasonably certain that such option will be exercised. Lease expense for minimum lease payments is recognized on a straight-line basis over the expected lease term. Cash and cash equivalents. Cash and cash equivalents include investments and interest-bearing instruments with maturities of 90 days or less at the date of acquisition. Such investments are carried at cost, which approximates market value. Revenue recognition. Rental revenue under the MGM-MGP Master Lease, which is accounted for as an operating lease, is recognized on a straight-line basis over the non-cancelable term and reasonably certain renewal periods, which includes the initial lease term of ten years and all four additional five-year terms under the lease, for all contractual revenues that are determined to be fixed and measurable, payment has been received or collectability is probable. The difference between such rental revenue earned and the cash rent due under the provisions of the lease is recorded as deferred rent receivable and included as a component of “Prepaid expenses and other assets” in the consolidated balance sheets or as “Deferred revenue” in the consolidated balance sheets if cash rent due exceeds rental revenue earned. “Ground lease and other” on the consolidated statements of operations reflects the non-cash ground lease revenue from the tenant and the amortization of deferred revenue relating to Non-Normal Tenant Improvements. Northfield generated gaming, food, beverage and other revenue, which primarily consisted of video lottery terminal (“VLT ” ) wager transactions and food and beverage transactions and such revenue relating to the operations of Northfield is classified as discontinued operations in 2019. Refer to Note 3 for further information. Ground lease expenses. Ground lease expenses arise from costs which include ground lease rent paid directly by the tenant pursuant to the third-party lessor on behalf of the Company. Acquisition-related expenses. The Company expenses transaction costs associated with completed or announced acquisitions in the period in which they are incurred. These costs are included in “Acquisition-related expenses” within the consolidated statements of operations. General and administrative. General and administrative expenses primarily include the salaries and benefits of employees and external consulting costs. In addition, pursuant to a corporate services agreement between the Operating Partnership and MGM (the “Corporate Services Agreement”), MGM provides the Operating Partnership and its subsidiaries with financial, administrative and operational support services, including accounting and finance support, human resources support, legal and regulatory compliance support, insurance advisory services, internal audit services, governmental affairs monitoring and reporting services, information technology support, construction services and various other support services. MGM is reimbursed for all costs it incurs directly related to providing the services thereunder. The Operating Partnership incurred expenses of $3.5 million pursuant to the Corporate Services Agreement for each year ended December 31, 2021, 2020 and 2019. Deferred financing costs. Deferred financing costs were incurred in connection with the issuance of the term loan facilities, revolving credit facility and senior notes. Costs incurred in connection with term loan facilities and senior notes were capitalized and offset against the carrying amount of the related indebtedness. Costs incurred in connection with the Operating Partnership’s revolving credit facility are capitalized as a component of prepaid expenses and other assets. These costs are amortized over the term of the indebtedness and are included in interest expense in the consolidated statement of operations. Concentrations of credit risk. As of December 31, 2021, all of the Company’s real estate properties have been leased to MGM and all of the Company’s revenues for the period ending December 31, 2021 are derived from the MGM-MGP Master Lease with MGM. Derivative financial instruments. The Company accounts for its derivatives in accordance with FASB ASC Topic 815, Derivatives and Hedging , in which all derivative instruments are reflected at fair value as either assets or liabilities. For derivative instruments that are designated and qualify as hedging instruments, the Company records the gain or loss on the hedge instruments as a component of accumulated other comprehensive income. For derivative instruments that are not designated and do not quality as hedging instruments, the Company records the gain or loss on the derivative instruments as ”Gain (loss) on unhedged interest rate swaps, net” on the consolidated statements of operations. Fair value measurements . Fair value measurements are utilized in the accounting and impairment assessments of the Company’s real estate investments. investment in unconsolidated affiliate, and certain of its financial assets and liabilities. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date and is measured according to a hierarchy that includes: Level 1 inputs, such as quoted prices in an active market; Level 2 inputs, which are observable inputs for similar assets; or Level 3 inputs, which are unobservable inputs. The Company used the following inputs in its fair value measurements: • Level 2 inputs for its debt fair value disclosures. See Note 7; and • Level 2 inputs when measuring the fair value of its interest rate swaps. See Note 8. Reportable segment. The Company’s operations consist of investments in real estate, both wholly owned and through its investment in MGP BREIT Venture, for which all such real estate properties are similar to one another in that they consist of large-scale destination entertainment and leisure properties and related offerings, whose tenants generally offer casino gaming, hotel, convention, dining, entertainment and retail amenities, have similar economic characteristics and are governed by triple-net operating leases. The operating results of the Company’s wholly owned and equity method real estate investments are regularly reviewed, in the aggregate, by the chief operating decision maker. As such, the Company has one reportable segment.

Acquisitions and Dispositions

Acquisitions and Dispositions	12 Months Ended
Acquisitions and Dispositions	Dec. 31, 2021
Business Combinations [Abstract]
ACQUISITIONS AND DISPOSITIONS	ACQUISITIONS AND DISPOSITIONS Empire City Acquisition As discussed in Note 1, on January 29, 2019, the Company acquired the developed real property associated with Empire City from MGM for fair value consideration of approximately $634.4 million. The Company funded the acquisition of the developed real property from MGM through the assumption of approximately $246.0 million of indebtedness, which was repaid with borrowings under its senior secured credit facility, and the issuance of approximately 12.9 million Operating Partnership units to MGM. Empire City was added to the MGM-MGP Master Lease, as further discussed in Note 6. The Empire City Transaction was accounted for as a transaction between entities under common control and, therefore, the Company recorded the Empire City real estate assets at the carryover basis of $625.0 million and recorded the difference between the purchase price of $634.4 million and carryover basis as a reduction to additional paid-in-capital. Northfield OpCo Transaction On April 1, 2019, the Company transferred Northfield OpCo to a subsidiary of MGM for fair value consideration of approximately $305.2 million consisting primarily of approximately 9.4 million Operating Partnership units that were ultimately redeemed by the Operating Partnership and the Company retained the real estate assets. The Company’s TRS that owned Northfield liquidated immediately prior to the transfer. Subsequently, MGM rebranded Northfield OpCo to MGM Northfield Park, which was then added to the MGM-MGP Master Lease. Refer to Note 6 for further discussion on the MGM-MGP Master Lease. The Northfield OpCo Transaction was accounted for as a transaction between entities under common control and, therefore, the Company had carried the Northfield OpCo operating assets and liabilities as held and used until the close of the transaction on April 1, 2019. As a transaction between entities under common control, the Company recorded the difference between the purchase price of $305.2 million and the carrying value of net assets transferred of $292.3 million to additional paid-in-capital. The Company’s results for Northfield OpCo for the year ended December 31, 2019 is reflected in discontinued operations on the consolidated statement of operations. The results of the Northfield OpCo discontinued operations are summarized as follows: Year Ended December 31, 2019 (in thousands) Total revenues $ 67,841 Total expenses (48,735) Income from discontinued operations before income taxes 19,106 Provision for income taxes (2,890) Income from discontinued operations, net of tax 16,216 Less: Income attributable to noncontrolling interests - discontinued operations (11,434) Income from discontinued operations attributable to Class A shareholders $ 4,782 MGM Springfield Transaction As discussed in Note 1, on October 29, 2021, the Company acquired the real property associated with MGM Springfield from MGM for cash consideration of $400 million. The Company funded the acquisition primarily with cash on hand and through a $35 million draw under the revolving credit facility. MGM Springfield was added to the MGM-MGP Master Lease, as further discussed in Note 6. The MGM Springfield Transaction was accounted for as a transaction between entities under common control and, therefore, the Company recorded the MGM Springfield real estate assets at the carryover basis of $695.6 million and recorded the difference between the purchase price of $400 million and carryover basis to additional paid-in-capital.

Real Estate Investments

Real Estate Investments	12 Months Ended
Real Estate Investments	Dec. 31, 2021
Real Estate [Abstract]
REAL ESTATE INVESTMENTS	REAL ESTATE INVESTMENTSAs discussed in Note 1, on February 14, 2020, in connection with the MGP BREIT Venture Transaction, the real estate assets of Mandalay Bay (including Mandalay Place), were contributed to MGP BREIT Venture. The Company recorded the difference between the carrying value of the Mandalay Bay real estate assets of $2.3 billion and the consideration received of $2.1 billion, as well as the expenses of $10.0 million incurred in connection with the sale, as a net loss on sale of assets of $193.1 million, which is reflected within “Property transactions, net” in the consolidated statements of operations. The carrying value of real estate investments is as follows: December 31, 2021 2020 (in thousands) Land $ 3,522,546 $ 3,431,228 Buildings, building improvements, land improvements and integral equipment 8,142,008 7,426,110 11,664,554 10,857,338 Less: Accumulated depreciation (2,884,033) (2,546,601) $ 8,780,521 $ 8,310,737

Investment in Unconsolidated Af

Investment in Unconsolidated Affiliate	12 Months Ended
Investment in Unconsolidated Affiliate	Dec. 31, 2021
Equity Method Investments and Joint Ventures [Abstract]
INVESTMENT IN UNCONSOLIDATED AFFILIATE	INVESTMENT IN UNCONSOLIDATED AFFILIATE As of December 31, 2021, the Operating Partnership’s investment in unconsolidated affiliate was comprised of its 50.1% interest in MGP BREIT Venture. The Operating Partnership recorded its share of income of $100.8 million and $89.1 million for the years ended December 31, 2021 and 2020, respectively, as “Income from unconsolidated affiliate” in the consolidated statements of operations. Additionally, the Operating Partnership received $94.1 million and $81.0 million in distributions from MGP BREIT Venture during the years ended December 31, 2021 and 2020, respectively. Summarized balance sheet information of MGP BREIT Venture is as follows: December 31, 2021 2020 (in thousands) Real estate investments, net $ 4,439,851 $ 4,523,638 Other assets 193,200 95,342 Debt, net 2,994,782 2,994,269 Other liabilities 8,018 7,811 Summarized results of operations of MGP BREIT Venture are as follows: Year ended December 31, 2021 2020 (in thousands) Net revenues $ 394,725 $ 346,481 Net income 201,246 177,757 MGP BREIT Venture guarantee . The Operating Partnership provides a guarantee for losses incurred by the lenders of the $3.0 billion indebtedness of the MGP BREIT Venture arising out of certain bad acts by the Operating Partnership, its venture partner, or the venture, such as fraud or willful misconduct, based on the party’s percentage ownership of the MGP BREIT Venture, which guarantee is capped at 10% of the principal amount outstanding at the time of the loss. The Operating Partnership and its venture partner have separately indemnified each other for the other party’s share of the overall liability exposure, if at fault. The guarantee is accounted for under ASC 460 at fair value; such value is immaterial. MGP BREIT Venture excess cash flow guarantee. The MGP BREIT Venture loan agreement requires that the tenant EBITDAR to MGP BREIT Venture cash interest ratio is maintained above a specified level. If this ratio is not met for two consecutive fiscal quarters, then the borrowers will be unable to distribute excess cash flows to the venture partners unless and until an excess cash flow guarantee is provided. The ratio was not met for the two consecutive quarters ended December 31, 2020, and, as a result, in April 2021, the Operating Partnership and an entity affiliated with BREIT each delivered an excess cash flow guarantee to the lenders covering all distributions since January 1, 2021. The guarantee provides that the MGP BREIT Venture may distribute an aggregate amount of cash not to exceed 9.9% of the principal amount of the MGP BREIT Venture’s outstanding indebtedness under the loan agreement, after which distributions must remain at the MGP BREIT Venture in a restricted cash account until such time as the tenant EBITDAR to MGP BREIT Venture cash interest ratio is met for two consecutive quarters. In addition, in the event of a default under the loan agreement while the ratio is not met, the Company may be required to return its respective share of distributions received during the period covered by the guarantee.

Leases

Leases	12 Months Ended
Leases	Dec. 31, 2021
Leases [Abstract]
LEASES	LEASES MGM-MGP Master Lease. The MGM-MGP Master Lease is accounted for as an operating lease and has an initial lease term of ten years that began on April 25, 2016 (other than with respect to MGM National Harbor as described below) with the potential to extend the term for four additional five-year terms thereafter at the option of the tenant (with additional renewal options with respect to MGM Springfield, as described below). The lease provides that any extension of its term must apply to all of the real estate under the lease at the time of the extension. With respect to MGM National Harbor, the initial lease term ends on August 31, 2024. Thereafter, the initial term of the lease with respect to MGM National Harbor may be renewed at the option of the tenant for an initial renewal period lasting until the earlier of the end of the then-current term of the lease or the next renewal term (depending on whether MGM elects to renew the other properties under the lease in connection with the expiration of the initial ten-year term). If, however, the tenant chooses not to renew the lease with respect to MGM National Harbor after the initial MGM National Harbor term under the lease, the tenant would also lose the right to renew the lease with respect to the rest of the properties when the initial ten-year lease term ends related to the rest of the properties in 2026. In addition to the four five-year renewal terms, the term of the lease with respect to MGM Springfield may be extended for an additional four five-year renewal terms. The lease has a triple-net structure, which requires the tenant to pay substantially all costs associated with the lease, including real estate taxes, ground lease rent, insurance, utilities and routine maintenance, in addition to the base rent. Additionally, the lease provides MGP with a right of first offer with respect to any future gaming development by MGM on the undeveloped land adjacent to Empire City, which MGP may exercise should MGM elect to sell such property in the future. Rent under the lease consists of a “base rent” component and a “percentage rent” component. As of December 31, 2021, the base rent represents approximately 91% of the rent payments due under the lease and the percentage rent represents approximately 9% of the rent payments due under the lease. The base rent includes a fixed annual rent escalator of 2.0% for the second through the sixth lease years (as defined in the lease). Thereafter, beginning on April 1, 2022, the annual escalator of 2.0% will be subject to the tenant and, without duplication, the MGM operating subsidiary sublessees of the tenant, collectively meeting an adjusted net revenue to rent ratio of 6.25:1.00 based on their net revenue from the leased properties subject to the lease (as determined in accordance with U.S. GAAP, adjusted to exclude net revenue attributable to certain scheduled subleases and, at the tenant’s option, reimbursed cost revenue). With respect to the additional renewal terms for MGM Springfield, for the first two additional renewal terms, base rent will include a fixed annual rent escalator of 2.0%, subject to the tenant and the MGM operating subsidiary sublessee of our tenant, collectively meeting an adjusted net revenue to rent ratio, discussed above. For each lease year subsequent to the first two additional renewal terms, the base rent shall be the Fair Market Rent (as defined in the MGM-MGP Master Lease) in respect of MGM Springfield. The percentage rent will initially be a fixed amount for approximately the first six years and will then be adjusted every five years based on the average annual adjusted net revenues of the tenant and, without duplication, the operating subtenants, from the leased properties subject to the lease at such time for the trailing five calendar-year period (calculated by multiplying the average annual adjusted net revenues, excluding net revenue attributable to certain scheduled subleases and, at the tenant’s option, reimbursed cost revenue, for the trailing five calendar-year period by 1.4%). On January 29, 2019, Empire City was added to the MGM-MGP Master Lease. As a result, the annual rent payment to MGP increased by $50 million, prorated for the remainder of the lease year. Consistent with the lease terms, 90% of this rent is fixed and will contractually grow at 2% per year until 2022. In addition, MGP has a right of first offer with respect to certain undeveloped land adjacent to the property to the extent MGM develops additional gaming facilities and chooses to sell or transfer the property in the future. On March 7, 2019, the Company completed the Park MGM Transaction and amended the MGM-MGP Master Lease concurrent with which the Company paid $637.5 million, of which $605.6 million was cash and the remainder in issuance of approximately 1.0 million of Operating Partnership units, to a subsidiary of MGM. As a result of the transaction, the Company recorded a lease incentive asset which represents the consideration paid, less the existing deferred revenue balance of $94.0 million relating to the non-normal tenant improvements recorded for Park MGM, which was derecognized. Further, the annual rent payment to the Company increased by $50 million, prorated for the remainder of the lease year. Consistent with the lease terms, 90% of this rent is fixed and will contractually grow at 2.0% per year until 2022. The Company was required to reassess the lease classification of the lease, which included estimating the fair value using an income approach and the residual value of the assets used in the determination of the implicit rate, and concluded that the lease continued to be an operating lease. On April 1, 2019, MGM Northfield Park was added to the MGM-MGP Master Lease and the annual rent payment increased by $60 million. Consistent with the lease terms, 90% of this rent is fixed and will contractually grow at 2.0% per year until 2022. On February 14, 2020, in connection with the MGP BREIT Venture Transaction, the MGM-MGP Master Lease was modified to remove the Mandalay Bay property and the annual rent payment under the lease was reduced by $133 million. The Company reassessed the lease classification of the lease, which included estimating the fair value of the properties using an income approach and the residual value used in the determination of the implicit rate, and concluded that the lease will continue to be accounted for as an operating lease. In connection with the commencement of the sixth lease year on April 1, 2021 and the corresponding 2.0% fixed annual rent escalator that went into effect on such date, the base rent under the MGM-MGP Master Lease increased to $764.9 million, resulting in total annual rent under the MGM-MGP Master Lease of $842.8 million. On October 29, 2021, in connection with the MGM Springfield Transaction, MGM Springfield was added to the MGM-MGP Master Lease and the annual rent payment increased by $30 million. Consistent with the lease terms, 90% of this rent is fixed and will contractually grow at 2.0% per year until 2022. As a result, the total annual rent under the MGM-MGP Master Lease increased to $872.8 million. The Company assessed the lease classification for the MGM Springfield property, which included determining, for lease classification purposes, that the tenant is reasonably certain to exercise lease renewal options to the extent that the lease term for MGM Springfield is consistent with that of the other MGM-MGP Master Lease properties, and also included estimating the residual value used in the determination of the implicit rate, and concluded that the lease will be accounted for as an operating lease. Straight-line rental revenues from the MGM-MGP Master Lease, which includes lease incentive asset amortization, were $757.9 million, $768.4 million, and $856.4 million for the years ended December 31, 2021, 2020 and 2019, respectively. The Company also recognized revenue related to ground lease and other of $24.1 million, $24.2 million, and $24.7 million for the years ended December 31, 2021, 2020, and 2019, respectively. Under the MGM-MGP Master Lease, future non-cancelable minimum cash rental payments, which are the payments under the initial 10-year term through April 30, 2026 and do not include renewal options and, with respect to MGM National Harbor, through August 31, 2024, are as follows as of December 31, 2021: Year ending December 31, (in thousands) 2022 $ 812,086 2023 791,861 2024 760,161 2025 696,760 2026 232,253 Thereafter — Total $ 3,293,121 Lessee Leases. The Company is a lessee of land underlying MGM National Harbor and a portion of the land underlying Borgata and Beau Rivage. The Company is obligated to make lease payments through the non-cancelable term of the ground leases, which is through 2051 for Beau Rivage, 2070 for Borgata, and 2082 for MGM National Harbor. These ground leases will be paid by the tenant under the MGM-MGP Master Lease through 2046 (including renewal periods). Components of lease expense for each of the years ended December 31, 2021 and December 31, 2020 include operating lease cost of $23.8 million. Other information related to the Company’s operating leases was as follows: Supplemental balance sheet information December 31, 2021 December 31, 2020 Weighted average remaining lease term (years) 56 58 Weighted average discount rate (%) 7 % 7 % Maturities of operating lease liabilities were as follows: Year ending December 31, (in thousands) 2022 $ 24,603 2023 24,478 2024 24,449 2025 24,449 2026 24,449 Thereafter 1,249,430 Total future minimum lease payments 1,371,858 Less: Amount of lease payments representing interest (1,034,398) Total $ 337,460
LEASES	LEASES MGM-MGP Master Lease. The MGM-MGP Master Lease is accounted for as an operating lease and has an initial lease term of ten years that began on April 25, 2016 (other than with respect to MGM National Harbor as described below) with the potential to extend the term for four additional five-year terms thereafter at the option of the tenant (with additional renewal options with respect to MGM Springfield, as described below). The lease provides that any extension of its term must apply to all of the real estate under the lease at the time of the extension. With respect to MGM National Harbor, the initial lease term ends on August 31, 2024. Thereafter, the initial term of the lease with respect to MGM National Harbor may be renewed at the option of the tenant for an initial renewal period lasting until the earlier of the end of the then-current term of the lease or the next renewal term (depending on whether MGM elects to renew the other properties under the lease in connection with the expiration of the initial ten-year term). If, however, the tenant chooses not to renew the lease with respect to MGM National Harbor after the initial MGM National Harbor term under the lease, the tenant would also lose the right to renew the lease with respect to the rest of the properties when the initial ten-year lease term ends related to the rest of the properties in 2026. In addition to the four five-year renewal terms, the term of the lease with respect to MGM Springfield may be extended for an additional four five-year renewal terms. The lease has a triple-net structure, which requires the tenant to pay substantially all costs associated with the lease, including real estate taxes, ground lease rent, insurance, utilities and routine maintenance, in addition to the base rent. Additionally, the lease provides MGP with a right of first offer with respect to any future gaming development by MGM on the undeveloped land adjacent to Empire City, which MGP may exercise should MGM elect to sell such property in the future. Rent under the lease consists of a “base rent” component and a “percentage rent” component. As of December 31, 2021, the base rent represents approximately 91% of the rent payments due under the lease and the percentage rent represents approximately 9% of the rent payments due under the lease. The base rent includes a fixed annual rent escalator of 2.0% for the second through the sixth lease years (as defined in the lease). Thereafter, beginning on April 1, 2022, the annual escalator of 2.0% will be subject to the tenant and, without duplication, the MGM operating subsidiary sublessees of the tenant, collectively meeting an adjusted net revenue to rent ratio of 6.25:1.00 based on their net revenue from the leased properties subject to the lease (as determined in accordance with U.S. GAAP, adjusted to exclude net revenue attributable to certain scheduled subleases and, at the tenant’s option, reimbursed cost revenue). With respect to the additional renewal terms for MGM Springfield, for the first two additional renewal terms, base rent will include a fixed annual rent escalator of 2.0%, subject to the tenant and the MGM operating subsidiary sublessee of our tenant, collectively meeting an adjusted net revenue to rent ratio, discussed above. For each lease year subsequent to the first two additional renewal terms, the base rent shall be the Fair Market Rent (as defined in the MGM-MGP Master Lease) in respect of MGM Springfield. The percentage rent will initially be a fixed amount for approximately the first six years and will then be adjusted every five years based on the average annual adjusted net revenues of the tenant and, without duplication, the operating subtenants, from the leased properties subject to the lease at such time for the trailing five calendar-year period (calculated by multiplying the average annual adjusted net revenues, excluding net revenue attributable to certain scheduled subleases and, at the tenant’s option, reimbursed cost revenue, for the trailing five calendar-year period by 1.4%). On January 29, 2019, Empire City was added to the MGM-MGP Master Lease. As a result, the annual rent payment to MGP increased by $50 million, prorated for the remainder of the lease year. Consistent with the lease terms, 90% of this rent is fixed and will contractually grow at 2% per year until 2022. In addition, MGP has a right of first offer with respect to certain undeveloped land adjacent to the property to the extent MGM develops additional gaming facilities and chooses to sell or transfer the property in the future. On March 7, 2019, the Company completed the Park MGM Transaction and amended the MGM-MGP Master Lease concurrent with which the Company paid $637.5 million, of which $605.6 million was cash and the remainder in issuance of approximately 1.0 million of Operating Partnership units, to a subsidiary of MGM. As a result of the transaction, the Company recorded a lease incentive asset which represents the consideration paid, less the existing deferred revenue balance of $94.0 million relating to the non-normal tenant improvements recorded for Park MGM, which was derecognized. Further, the annual rent payment to the Company increased by $50 million, prorated for the remainder of the lease year. Consistent with the lease terms, 90% of this rent is fixed and will contractually grow at 2.0% per year until 2022. The Company was required to reassess the lease classification of the lease, which included estimating the fair value using an income approach and the residual value of the assets used in the determination of the implicit rate, and concluded that the lease continued to be an operating lease. On April 1, 2019, MGM Northfield Park was added to the MGM-MGP Master Lease and the annual rent payment increased by $60 million. Consistent with the lease terms, 90% of this rent is fixed and will contractually grow at 2.0% per year until 2022. On February 14, 2020, in connection with the MGP BREIT Venture Transaction, the MGM-MGP Master Lease was modified to remove the Mandalay Bay property and the annual rent payment under the lease was reduced by $133 million. The Company reassessed the lease classification of the lease, which included estimating the fair value of the properties using an income approach and the residual value used in the determination of the implicit rate, and concluded that the lease will continue to be accounted for as an operating lease. In connection with the commencement of the sixth lease year on April 1, 2021 and the corresponding 2.0% fixed annual rent escalator that went into effect on such date, the base rent under the MGM-MGP Master Lease increased to $764.9 million, resulting in total annual rent under the MGM-MGP Master Lease of $842.8 million. On October 29, 2021, in connection with the MGM Springfield Transaction, MGM Springfield was added to the MGM-MGP Master Lease and the annual rent payment increased by $30 million. Consistent with the lease terms, 90% of this rent is fixed and will contractually grow at 2.0% per year until 2022. As a result, the total annual rent under the MGM-MGP Master Lease increased to $872.8 million. The Company assessed the lease classification for the MGM Springfield property, which included determining, for lease classification purposes, that the tenant is reasonably certain to exercise lease renewal options to the extent that the lease term for MGM Springfield is consistent with that of the other MGM-MGP Master Lease properties, and also included estimating the residual value used in the determination of the implicit rate, and concluded that the lease will be accounted for as an operating lease. Straight-line rental revenues from the MGM-MGP Master Lease, which includes lease incentive asset amortization, were $757.9 million, $768.4 million, and $856.4 million for the years ended December 31, 2021, 2020 and 2019, respectively. The Company also recognized revenue related to ground lease and other of $24.1 million, $24.2 million, and $24.7 million for the years ended December 31, 2021, 2020, and 2019, respectively. Under the MGM-MGP Master Lease, future non-cancelable minimum cash rental payments, which are the payments under the initial 10-year term through April 30, 2026 and do not include renewal options and, with respect to MGM National Harbor, through August 31, 2024, are as follows as of December 31, 2021: Year ending December 31, (in thousands) 2022 $ 812,086 2023 791,861 2024 760,161 2025 696,760 2026 232,253 Thereafter — Total $ 3,293,121 Lessee Leases. The Company is a lessee of land underlying MGM National Harbor and a portion of the land underlying Borgata and Beau Rivage. The Company is obligated to make lease payments through the non-cancelable term of the ground leases, which is through 2051 for Beau Rivage, 2070 for Borgata, and 2082 for MGM National Harbor. These ground leases will be paid by the tenant under the MGM-MGP Master Lease through 2046 (including renewal periods). Components of lease expense for each of the years ended December 31, 2021 and December 31, 2020 include operating lease cost of $23.8 million. Other information related to the Company’s operating leases was as follows: Supplemental balance sheet information December 31, 2021 December 31, 2020 Weighted average remaining lease term (years) 56 58 Weighted average discount rate (%) 7 % 7 % Maturities of operating lease liabilities were as follows: Year ending December 31, (in thousands) 2022 $ 24,603 2023 24,478 2024 24,449 2025 24,449 2026 24,449 Thereafter 1,249,430 Total future minimum lease payments 1,371,858 Less: Amount of lease payments representing interest (1,034,398) Total $ 337,460

Debt

Debt	12 Months Ended
Debt	Dec. 31, 2021
Debt Disclosure [Abstract]
DEBT	DEBT Debt consists of the following: December 31, 2021 2020 (in thousands) Senior secured revolving credit facility $ 50,000 $ 10,000 5.625% senior notes, due 2024 1,050,000 1,050,000 4.625% senior notes, due 2025 800,000 800,000 4.50% senior notes, due 2026 500,000 500,000 5.75% senior notes, due 2027 750,000 750,000 4.50% senior notes, due 2028 350,000 350,000 3.875% senior notes, due 2029 750,000 750,000 4,250,000 4,210,000 Less: Unamortized discount and debt issuance costs (33,123) (41,041) $ 4,216,877 $ 4,168,959 Operating Partnership credit agreement and bridge facility. At December 31, 2021, the Operating Partnership senior secured credit facility consisted of a $1.4 billion revolving credit facility. The revolving facility bears interest of London Inter-bank Offered Rate (“LIBOR”) plus 1.75% to 2.25% determined by reference to a total net leverage ratio pricing grid. At December 31, 2021, the interest rate on the revolving facility was 1.85%. The revolving facility will mature in June 2023. The Operating Partnership’s senior credit facility limits the amount of letters of credit that can be issued to $75 million. No letters of credit were outstanding under the Operating Partnership senior secured credit facility at December 31, 2021. See Note 8 for further discussion of the Operating Partnership’s interest rate swap agreements. In connection with the MGP BREIT Venture Transaction, on February 14, 2020, the Operating Partnership amended its senior secured credit facility to, among other things, allow for the transaction to occur, permit the incurrence by the Operating Partnership of a nonrecourse guarantee relating to the debt of the MGP BREIT Venture (refer to Note 5 for description of such guarantee), and permit the incurrence of the bridge loan facility. As a result of the transaction and the amendment, the Operating Partnership repaid its $1.3 billion outstanding term loan B facility in full with the proceeds of a bridge facility, which was then assumed by the MGP BREIT Venture as partial consideration for the Operating Partnership’s contribution. Additionally, the Operating Partnership used the proceeds from the settlement of the forward equity issuances made in connection with its November 2019 equity offering and from its “at-the-market offering” (“ATM”) program to pay off the outstanding balance of $399 million of its term loan A facility in full. The Operating Partnership incurred a loss on retirement of debt of $18.1 million recorded in “Other” in the consolidated statements of operations. The credit agreement contains customary representations and warranties, events of default and positive and negative covenants. The revolving credit facility also requires that the Operating Partnership maintain compliance with a maximum senior secured net debt to adjusted total asset ratio, a maximum total net debt to adjusted asset ratio and a minimum interest coverage ratio. The Operating Partnership was in compliance with its financial covenants at December 31, 2021. The revolving credit facility and the term loan facilities are both guaranteed by each of the Operating Partnership’s existing and subsequently acquired direct and indirect wholly owned material domestic restricted subsidiaries, except MGM Springfield reDevelopment, LLC, which owns the real estate assets of MGM Springfield, and secured by a first priority lien security interest on substantially all of the Operating Partnership’s and such restricted subsidiaries’ material assets, including mortgages on its real estate, excluding the real estate assets of MGM National Harbor, Empire City, and MGM Springfield, and subject to other customary exclusions. Bridge Facility. In connection with the Empire City Transaction, the Operating Partnership assumed $246.0 million of indebtedness under a bridge facility from a subsidiary of MGM. The Operating Partnership repaid the bridge facility with a combination of cash on hand and a draw on its revolving credit facility, which was subsequently repaid with proceeds from its offering of its 5.75% senior notes due 2027, as discussed below. Operating Partnership senior notes. In January 2019, the Operating Partnership issued $750 million in aggregate principal amount of 5.75% senior notes due 2027. The senior notes will mature on February 1, 2027. Interest on the senior notes is payable on February 1 and August 1 of each year, which commenced on August 1, 2019. In June 2020, the Operating Partnership issued $800 million in aggregate principal amount of 4.625% senior notes due 2025. The senior notes mature on June 15, 2025. Interest on the senior notes is payable on June 15 and December 15 of each year, commencing on December 15, 2020. The net proceeds from the offering were used in full to repay drawings under the Operating Partnership’s revolving credit facility. In November 2020, the Operating Partnership issued $750 million in aggregate principal amount of 3.875% senior notes due 2029. The senior notes mature on February 15, 2029. Interest on the senior notes is payable on February 15 and August 15 of each year, commencing on August 15, 2021. The net proceeds from the offering were used for general corporate purposes and, ultimately, to redeem $700 million of Operating Partnership units held by MGM pursuant to the waiver agreement discussed in Note 1. Each series of the Operating Partnership’s senior notes are fully and unconditionally guaranteed, jointly and severally, on a senior basis by all of the Operating Partnership’s subsidiaries that guarantee the Operating Partnership’s credit facilities, other than MGP Finance Co-Issuer, Inc., which is a co-issuer of the senior notes. The Operating Partnership may redeem all or part of the senior notes at a redemption price equal to 100% of the principal amount of the senior notes plus, to the extent the Operating Partnership is redeeming senior notes prior to the date that is three months prior to their maturity date, an applicable make whole premium, plus, in each case, accrued and unpaid interest. The indentures governing the senior notes contain customary covenants and events of default. These covenants are subject to a number of important exceptions and qualifications set forth in the applicable indentures governing the senior notes, including, with respect to the restricted payments covenants, the ability to make unlimited restricted payments to maintain the REIT status of MGP. Maturities of debt. Maturities of the principal amount of the Operating Partnership’s debt as of December 31, 2021 are as follows: Year ending December 31, (in thousands) 2022 $ — 2023 50,000 2024 1,050,000 2025 800,000 2026 500,000 Thereafter 1,850,000 $ 4,250,000 Fair value of debt. The estimated fair value of the Operating Partnership’s debt was $4.6 billion and $4.5 billion at December 31, 2021 and 2020, respectively. Fair value was estimated using quoted market prices for the Operating Partnership’s senior notes and senior secured credit facility.

Derivatives and Hedging Activit

Derivatives and Hedging Activities	12 Months Ended
Derivatives and Hedging Activities	Dec. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVES AND HEDGING ACTIVITIES	DERIVATIVES AND HEDGING ACTIVITIESThe Operating Partnership uses derivative instruments to mitigate the effects of interest rate volatility inherent in its variable rate senior credit facility and forecasted debt issuances for the duration and amount of its interest rate swap agreements, which such variable rate could unfavorably impact future earnings and forecasted cash flows. The Operating Partnership and Company do not use derivative instruments for speculative or trading purposes. In June 2019, the Operating Partnership entered into interest rate swap agreements, effective November 30, 2021, that were to mature in December 2024 with a combined notional amount of $900 million. The weighted average fixed rate paid under the swap agreements was 1.801% and the variable rate received reset monthly to the one-month LIBOR with no minimum floor. Subsequently, in June 2021, the Operating Partnership modified and extended certain of its existing interest rate swaps with a combined notional amount of $900 million, effective June 30, 2022. The weighted average fixed rate paid under the modified swap agreements is 1.940% and the variable rate received resets monthly to the one-month LIBOR with no minimum floor. The maturity dates were extended to June 30, 2027. In September 2019, the Operating Partnership entered into an interest rate swap agreement, effective September 6, 2019, that will mature in December 2024 with a notional amount of $300 million. The fixed rate paid under the swap agreement is 1.158% and the variable rate received resets monthly to the one-month LIBOR with no minimum floor. In September 2019, the Operating Partnership modified and extended certain of its existing interest rate swaps with a combined notional amount of $400 million, effective October 1, 2019. The weighted average fixed rate paid under the modified swap agreements is 2.252% and the variable rate received resets monthly to the one-month LIBOR with no minimum floor. The maturity date was extended to December 2029. In connection with prepayments of $541 million on the Operating Partnership’s senior credit facility in November 2019, as well as in contemplation of the proceeds that will be received upon settlement of the 12.0 million shares under forward purchase agreements discussed in Note 10, the Operating Partnership determined that such debt cash flows were no longer considered probable of occurring. As a result, the Operating Partnership de-designated the corresponding $600 million notional of interest rate swaps and reclassified the loss of $4.9 million reported in accumulated other comprehensive income relating to such notional into earnings within “Gain (loss) on unhedged interest rate swaps, net” on the consolidated income statements for the year ended December 31, 2019. In connection with the $800 million issuance of senior notes in June 2020 and in connection with the $750 million issuance of senior notes in November 2020, each discussed in Note 7, the Operating Partnership determined that it will no longer be exposed to cash flow variability for the respective issuances and, accordingly, the Operating Partnership de-designated $600 million and $700 million notional of interest rate swaps in June 2020 and November 2020, respectively. Amounts deferred in accumulated comprehensive loss relating to the $600 million and $700 million notional of swaps will be amortized into earnings over the life of the hedged cash flows within “Interest expense” on the consolidated income statements. In May 2021, the Operating Partnership terminated interest rate swap agreements with a notional amount of $1.2 billion which resulted in a loss of less than $0.1 million. Changes in the fair value of the interest rate swaps that do not qualify for hedge accounting are also reflected in earnings within “Gain (loss) on unhedged interest rate swaps, net” on the consolidated income statements. The Operating Partnership recorded a $39.1 million gain, $2.1 million gain and a $1.0 million gain relating to such fair value changes for the year ended December 31, 2021, 2020 and 2019, respectively. The interest rate swaps as of December 31, 2021 are summarized in the table below. Notional Amount Weighted Average Fixed Rate Fair Value Liability Effective Date Maturity Date (in thousands, except percentages) Derivatives designated as hedges: $ 900,000 1.940 % $ (25,299) June 30, 2022 June 30, 2027 $ 900,000 $ (25,299) Derivatives not designated as hedges: $ 300,000 1.158 % $ (969) September 6, 2019 December 31, 2024 400,000 2.252 % (26,319) October 1, 2019 December 31, 2029 $ 700,000 $ (27,288) $ (52,587) The interest rate swaps as of December 31, 2020 are summarized in the table below. Notional Amount Weighted Average Fixed Rate Fair Value Liability Effective Date Maturity Date (in thousands, except percentages) Derivatives designated as hedges: $ 900,000 1.801 % $ (41,131) November 30, 2021 December 31, 2024 $ 900,000 $ (41,131) Derivatives not designated as hedges: $ 1,200,000 1.844 % $ (18,889) May 3, 2017 November 30, 2021 300,000 1.158 % (10,451) September 6, 2019 December 31, 2024 400,000 2.252 % (48,453) October 1, 2019 December 31, 2029 $ 1,900,000 $ (77,793) $ (118,924) As of December 31, 2021 and 2020, the Operating Partnership’s interest rate swaps that are in a liability position are recorded within “Accounts payable, accrued expenses and other liabilities”.

Income Taxes

Income Taxes	12 Months Ended
Income Taxes	Dec. 31, 2021
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES The Company elected to be taxed as a REIT as defined under Section 856(a) of the Internal Revenue Code of 1986, as amended (the “Code”), commencing with its taxable year ended December 31, 2016. To qualify as a REIT, the Company must meet certain organizational, income, asset and distribution tests. Accordingly, except as described below, the Company will generally not be subject to corporate U.S. federal or state income tax to the extent that it makes qualifying distributions of all of its taxable income to its shareholders and provided it satisfies on a continuing basis, through actual investment and operating results, the REIT requirements, including certain asset, income, distribution and share ownership tests. U.S. federal income tax law generally requires that a REIT distribute annually at least 90% of its REIT taxable income, without regard to the deduction for dividends paid and excluding net capital gains, and that it pays taxes at regular corporate income tax rates to the extent that it annually distributes less than 100% of its taxable income. The Company distributed 100% of its taxable income in the taxable year ended December 31, 2021 and expects to do so in future years. Accordingly, the consolidated financial statements do not reflect a provision for federal income taxes for its REIT operations; however, the Company was subject to federal, state and local income tax on its TRS operations which were disposed of during 2019 and may still be subject to federal excise tax, as well as certain state and local income and franchise taxes on its REIT operations. The Company’s TRS owned the real estate assets and operations of Northfield until it liquidated on April 1, 2019. The Company recorded a tax provision of $2.9 million in discontinued operations and a tax benefit of $1.1 million in continuing operations for a total tax provision of $1.8 million related to the operations of the TRS for the year ended December 31, 2019 and has no provision relating to TRS operations subsequent to the liquidation. The Company accounts for income taxes under the asset and liability method, which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been included in the financial statements. Under this method, the Company determines deferred tax assets and liabilities on the basis of the differences between the financial statement and tax basis of assets and liabilities by using enacted tax rates in effect for the year in which the differences are expected to reverse. The effect of a change in tax rates on deferred tax assets and liabilities is recognized in income in the period that includes the enactment date. The MGM-MGP Master Lease landlord is required to join in the filing of a New Jersey consolidated corporation business tax return under the New Jersey Casino Control Act and include in such return its income and expenses associated with its New Jersey assets and is thus subject to an entity level tax in New Jersey. Although the consolidated New Jersey return also includes MGM and certain of its subsidiaries, the Company is required to record New Jersey state income taxes in the consolidated financial statements as if the MGM-MGP Master Lease landlord was taxed for state purposes on a stand-alone basis. The Company and MGM have entered into a tax sharing agreement providing for an allocation of taxes due in the consolidated New Jersey return. Pursuant to this agreement, the MGM-MGP Master Lease landlord will only be responsible for New Jersey taxes on any gain that may be realized upon a future sale of the New Jersey assets resulting solely from an appreciation in value of such assets over their value on the date they were contributed to the MGM-MGP Master Lease landlord by a subsidiary of MGM. MGM is responsible for all other taxes reported in the New Jersey consolidated return and, accordingly, the income tax balances related to such taxes are reflected within “Noncontrolling interest” within the consolidated financial statements. No amounts are due to MGM under the tax sharing agreement as of December 31, 2021 or December 31, 2020. The provision for income taxes on continuing operations is as follows: Year Ended December 31, 2021 2020 2019 (in thousands) Federal: Deferred $ — $ — $ (1,058) Provision for federal income taxes on continuing operations $ — $ — $ (1,058) State: Current $ 9,344 $ 6,345 $ 7,309 Deferred (16) 3,389 1,347 Provision for state income taxes on continuing operations $ 9,328 $ 9,734 $ 8,656 A reconciliation of the federal income tax statutory rate and the Company’s effective tax rate on income from continuing operations is as follows: Year Ended December 31, 2021 2020 2019 Federal income tax statutory rate 21.0 % 21.0 % 21.0 % Income not subject to federal income tax (21.0) (21.0) (21.4) State taxes 2.5 5.7 3.2 Effective tax rate on income from continuing operations 2.5 % 5.7 % 2.8 % The major tax-effected components of the Company’s net deferred tax liability are as follows: December 31, 2021 2020 (in thousands) Deferred tax liability – federal and state Real estate investments, net $ (41,217) $ (33,298) Total deferred tax liability (41,217) (33,298) Net deferred tax liability $ (41,217) $ (33,298) The Company assesses its tax positions using a two-step process. A tax position is recognized if it meets a “more likely than not” threshold, and is measured at the largest amount of benefit that is greater than 50% likely of being realized. Uncertain tax positions must be reviewed at each balance sheet date. Liabilities recorded as a result of this analysis must generally be recorded separately from any current or deferred income tax accounts. The Company currently has no uncertain tax positions. The Company recognizes accrued interest and penalties related to unrecognized tax benefits in income tax expense. No interest or penalties were recorded for the years ended December 31, 2021, 2020, or 2019. The Company files income tax returns in the U.S. federal jurisdiction and various state and local jurisdictions. As of December 31, 2021, federal and Mississippi income tax returns for tax years 2018 and after, and all other state and local income tax returns filed for tax years 2017 and after, are subject to examination by the relevant taxing authorities.

Shareholders' Equity and Partne

Shareholders' Equity and Partners' Capital	12 Months Ended
Shareholders' Equity and Partners' Capital	Dec. 31, 2021
Equity [Abstract]
SHAREHOLDERS' EQUITY AND PARTNERS' CAPITAL	SHAREHOLDERS’ EQUITY AND PARTNERS’ CAPITAL MGP shareholders . Issuance of Class A shares. On January 31, 2019, the Company completed an offering of 19.6 million Class A shares representing limited liability company interests in a registered public offering, including 2.6 million Class A shares sold pursuant to the exercise in full by the underwriters of their over-allotment option, for net proceeds of approximately $548.4 million. On April 30, 2019, the Company entered into an ATM program to offer and sell up to an aggregate sales price of $300 million Class A shares through sales agents at prevailing market prices or agreed-upon prices. During the year ended December 31, 2019, the Company issued 5.3 million Class A shares under the program for net proceeds of approximately $161.0 million. On February 12, 2020, the Company received net proceeds of approximately $18.7 million for 0.6 million of forward shares settled under the ATM program. On November 22, 2019, the Company completed an offering of 30.0 million Class A shares in a registered public offering. The offering consisted of 18.0 million shares sold directly to the underwriters at closing for net proceeds of approximately $540.6 million after deducting underwriting discounts and commissions and 12.0 million shares sold under forward purchase agreements. On February 11 through February 13, 2020, the Company received net proceeds of approximately $355.9 million for 12.0 million of forward shares settled. The forward shares settled in exchange for cash proceeds per share equal to the applicable forward sale price, which was the public offering price less the underwriting discount and was subject to certain adjustments as provided in the forward sale agreements. On February 14, 2020, in connection with the MGP BREIT Venture Transaction, the Company completed a registered sale of 4.9 million Class A shares to BREIT for proceeds of $150.0 million. On March 15, 2021, the Company completed an offering of 21.9 million Class A shares in a registered public offering for net proceeds of approximately $676.0 million. On May 12, 2021, the Company resumed its 2019 ATM program to offer and sell the remaining $117.7 million of aggregate cash proceeds from sales of Class A shares under the $300 million program through sales agents at prevailing market prices or agreed-upon prices. The Company issued 3.3 million Class A shares for net proceeds of $116.8 million during the year ended December 31, 2021 and completed its ATM program. Operating Partnership capital and noncontrolling interest ownership transactions. The following discloses the effects of changes in the Company’s ownership percentage interest in its subsidiary, the Operating Partnership, on the Class A shareholders’ equity: For the years ended 2021 2020 2019 (in thousands) Net income attributable to MGM Growth Properties $ 205,503 $ 76,129 $ 90,260 Transfers from/(to) noncontrolling interest: Empire City Transaction — — 23,745 Issuance of Class A shares 656,361 442,717 1,049,582 Park MGM Transaction — — 2,496 Northfield OpCo Transaction — — (27,439) MGP BREIT Venture Transaction — 8,287 — Redemption of temporary equity — (114,924) — Redemption of Operating Partnership units (227,487) — — Other (840) 1,275 1,183 Net transfers from noncontrolling interest 428,034 337,355 1,049,567 Change from net income attributable to MGM Growth Properties and transfers to noncontrolling interest $ 633,537 $ 413,484 $ 1,139,827 Empire City Transaction. On January 29, 2019, in connection with the Empire City Transaction, the Operating Partnership issued 12.9 million Operating Partnership units to a subsidiary of MGM and MGP’s indirect ownership percentage in the Operating Partnership decreased from 26.7% to 25.4%. Issuance of Class A shares and Operating Partnership units - January 2019. On January 31, 2019, in connection with the Company’s registered offering of Class A shares, the Operating Partnership issued 19.6 million Operating Partnership units to the Company and MGP’s indirect ownership percentage in the Operating Partnership increased from 25.4% to 30.3%. Park MGM Transaction. On March 7, 2019, in connection with the Park MGM Transaction, the Operating Partnership issued 1.0 million Operating Partnership units to a subsidiary of MGM and MGP’s indirect ownership percentage in the Operating Partnership decreased from 30.3% to 30.2%. Northfield OpCo Transaction. On April 1, 2019, in connection with the Northfield OpCo Transaction, 9.4 million Operating Partnership units were ultimately redeemed by the Operating Partnership and MGP’s indirect ownership percentage in the Operating Partnership increased from 30.2% to 31.2%. Issuance of Class A shares and Operating Partnership units - ATM Program - 2019. In connection with the Company’s issuance of Class A shares under the ATM program during 2019, the Operating Partnership issued 5.3 million Operating Partnership units to the Company. Subsequent to the collective issuances, the ownership percentage in the Operating Partnership was 32.4%. Issuance of Class A shares and Operating Partnership units - November 2019. On November 22, 2019, in connection with the Company’s registered offering of Class A shares, the Operating Partnership issued 18.0 million Operating Partnership units to the Company. As a result of this transaction, MGP’s indirect ownership percentage in the Operating Partnership increased to 36.3%. Issuance of Class A shares and Operating Partnership units - Forwards. In connection with the registered issuance of 12.0 million Class A shares by the Company from February 11 through February 13, 2020 pursuant to the settlement of forward sales agreements from the November 2019 registered offering, discussed above, the Operating Partnership issued 12.0 million Operating Partnership units to the Company. Further, in connection with the registered issuance of 0.6 million of shares by the Company on February 12, 2020 pursuant to the settlement of forward sales agreements under the Company’s ATM program, the Operating Partnership issued 0.6 million Operating Partnership units to the Company. As a result of these collective issuances, MGP’s indirect ownership percentage in the Operating Partnership increased to 38.8%. Issuance of Class A shares and Operating Partnership units - BREIT. On February 14, 2020, in connection with the Company’s registered sale of Class A shares to BREIT, the Operating Partnership issued 4.9 million Operating Partnership units to the Company and the Company’s indirect ownership percentage in the Operating Partnership increased from 38.8% to 39.7%. MGP BREIT Venture Transaction. On February 14, 2020, in connection with the MGP BREIT Venture Transaction, the Operating Partnership issued 2.6 million Operating Partnership units to MGM and the Company’s indirect ownership percentage in the Operating Partnership decreased from 39.7% to 39.4%. Redemption of temporary equity. On May 18, 2020, in connection with the redemption waiver discussed in Note 1 and Note 2, the Operating Partnership redeemed 30.3 million Operating Partnership units from MGM for $700 million and the Company’s indirect ownership percentage in the Operating Partnership increased from 39.4% to 43.3%. On December 2, 2020 the Operating Partnership further redeemed 23.5 million Operating Partnership units from MGM for $700 million and the Company’s indirect ownership percentage in the Operating Partnership increased from 43.3% to 47.0%. Proceeds from the issuance of Class A shares by MGP - March 2021. On March 15, 2021, the Company completed a registered offering of Class A shares for net proceeds of approximately $676.0 million, which such proceeds were used to satisfy, in part, the Company’s obligations under the notice of redemption of Operating Partnership units from MGM, as discussed below. Redemption of Operating Partnership units - March 2021. On March 4, 2021, certain subsidiaries of MGM delivered a notice of redemption to the Company covering approximately 37.1 million Operating Partnership units that they held, in accordance with the terms of the Operating Partnership’s partnership agreement. In accordance with the terms of such agreement, upon receipt of the notice of redemption, the Company formed a conflicts committee to determine the mix of consideration that it would provide for the Operating Partnership units. The conflicts committee determined that the Company would redeem approximately 15.3 million Operating Partnership units for cash on March 12, 2021 (with such Operating Partnership units retired upon redemption) and would satisfy its remaining obligation under that notice covering the remaining 21.9 million Operating Partnership units using the proceeds, net of underwriters’ discount, from an offering of MGP’s Class A shares on March 15, 2021, for aggregate cash proceeds paid of approximately $1.2 billion. As a result of these collective transactions, MGP’s indirect ownership percentage in the Operating Partnership increased from 47.0% to 57.9%. MGP Class A share issuance - ATM Program. During the year ended December 31, 2021, in connection with the Company’s issuance of Class A shares under the ATM program, which completed its ATM program, the Operating Partnership issued 3.3 million Operating Partnership units to the Company. As a result of these issuances, MGP’s ownership percentage in the Operating Partnership was 58.4% as of the date of completion of the ATM program. Accumulated Other Comprehensive Income (Loss). Comprehensive income (loss) includes net income and all other non-shareholder changes in equity, or other comprehensive income (loss). Elements of the Company’s accumulated other comprehensive income (loss) are reported in the accompanying consolidated statement of shareholders’ equity. The following table summarizes the changes in accumulated other comprehensive income (loss) by component: Cash Flow Hedges Other Total (in thousands) Balance at December 31, 2018 $ 4,306 $ (98) $ 4,208 Other comprehensive loss before reclassifications (34,476) — (34,476) Amounts reclassified from accumulated other comprehensive loss to interest expense (5,599) — (5,599) Amounts reclassified from accumulated other comprehensive loss to (gain)/loss on unhedged interest rate swaps 4,877 — 4,877 Other comprehensive loss (35,198) — (35,198) Other changes in accumulated other comprehensive loss: Empire City Transaction — (195) (195) Issuance of Class A shares — (1,512) (1,512) Park MGM Transaction — (16) (16) Northfield OpCo Transaction — 2 2 Changes in accumulated other comprehensive loss: (35,198) (1,721) (36,919) Less: Other comprehensive loss attributable to noncontrolling interest 25,666 — 25,666 Balance at December 31, 2019 (5,226) (1,819) (7,045) Other comprehensive loss before reclassifications (104,999) — (104,999) Amounts reclassified from accumulated other comprehensive loss to interest expense 17,922 — 17,922 Amounts reclassified from accumulated other comprehensive loss to (gain)/loss on unhedged interest rate swaps (2,547) — (2,547) Other comprehensive loss (89,624) — (89,624) Other changes in accumulated other comprehensive loss: Issuance of Class A shares — (646) (646) MGP BREIT Venture Transaction — 59 59 Redemption of temporary equity — (8,773) (8,773) Other — 45 45 Changes in accumulated other comprehensive loss: (89,624) (9,315) (98,939) Less: Other comprehensive loss attributable to noncontrolling interest 54,787 — 54,787 Balance at December 31, 2020 (40,063) (11,134) (51,197) Other comprehensive income before reclassifications 16,378 — 16,378 Amounts reclassified from accumulated other comprehensive loss to interest expense 22,200 — 22,200 Other comprehensive income 38,578 — 38,578 Other changes in accumulated other comprehensive loss: Issuance of Class A shares — (4,172) (4,172) Redemption of Operating Partnership units — (6,860) (6,860) Other — (25) (25) Changes in accumulated other comprehensive loss: 38,578 (11,057) 27,521 Less: Other comprehensive income attributable to noncontrolling interest (17,513) — (17,513) Balance at December 31, 2021 $ (18,998) $ (22,191) $ (41,189) At December 31, 2021, the estimated amount currently recorded in accumulated other comprehensive loss that will be recognized in earnings over the next 12 months is not material. MGP dividends and Operating Partnership distributions. The Operating Partnership declares and pays distributions. MGP pays its dividends with the receipt of its share of the Operating Partnership’s distributions. Dividends with respect to MGP’s Class A shares are characterized for federal income tax purposes as taxable ordinary dividends, capital gains dividends, non-dividend distributions or a combination thereof. A summary of the Company’s stock distributions for the years ended December 31, 2021, 2020, and 2019 is as follows: Year Ended December 31, 2021 2020 2019 Non-qualified dividends $ 1.6363 81.11 % $ 1.4649 76.30 % $ 1.6134 87.21 % Return of capital 0.3812 18.89 % 0.4551 23.70 % 0.2366 12.79 % Total $ 2.0175 100.00 % $ 1.9200 100.00 % $ 1.8500 100.00 %

Earnings Per Class A Share

Earnings Per Class A Share	12 Months Ended
Earnings Per Class A Share	Dec. 31, 2021
Earnings Per Share [Abstract]
EARNINGS PER CLASS A SHARE	EARNINGS PER CLASS A SHARE The table below provides earnings and the number of Class A shares used in the computations of “basic” earnings per share, which utilizes the weighted average number of Class A shares outstanding without regard to dilutive potential Class A shares, and “diluted” earnings per share, which includes all such shares. Diluted earnings per Class A share does not assume conversion of the Operating Partnership units held by MGM as such conversion would be antidilutive. Earnings per share has not been presented for the Class B shareholder as the Class B share is not entitled to any economic rights in the Company. Twelve Months Ended December 31, 2021 2020 2019 (in thousands) Numerator: Income from continuing operations, net of tax $ 359,240 $ 160,371 $ 259,349 Less: Income from continuing operations attributable to noncontrolling interest (153,737) (84,242) (173,871) Income from continuing operations attributable to Class A shares - basic and diluted 205,503 76,129 85,478 Income from discontinued operations, net of tax — — 16,216 Less: Income from discontinued operations attributable to noncontrolling interest — — (11,434) Income from discontinued operations attributable to Class A shares - basic and diluted — — 4,782 Net income attributable to Class A shares - basic and diluted $ 205,503 $ 76,129 $ 90,260 Denominator: Weighted average Class A shares outstanding (1) - basic 151,000 129,491 93,047 Effect of dilutive shares for diluted net income per Class A share (2) 194 162 252 Weighted average Class A shares outstanding (1) - diluted 151,194 129,653 93,299 (1) Includes weighted average deferred share units granted to certain members of the board of directors. (2) Less than 0.1 million shares related to outstanding share-based compensation awards were excluded due to being antidilutive for each of the years ended December 31, 2021, December 31, 2020 and December 31, 2019. The table below provides earnings and the number of Operating Partnership units used in the computations of “basic” earnings per Operating Partnership unit, which utilizes the weighted average number of Operating Partnership units outstanding without regard to dilutive potential Operating Partnership units, and “diluted” earnings per Operating Partnership units, which includes all such Operating Partnership units. Twelve Months Ended December 31, 2021 2020 2019 (in thousands) Numerator: Income from continuing operations, net of tax, attributable to unitholders - basic and diluted $ 359,240 $ 160,371 $ 259,349 Income from discontinued operations, net of tax - basic and diluted — — 16,216 Net income attributable to unitholders - basic and diluted $ 359,240 $ 160,371 $ 275,565 Denominator: Weighted average Operating Partnership units outstanding (1) - basic 269,674 310,688 293,885 Effect of dilutive shares for diluted net income per Operating Partnership unit (2) 194 162 252 Weighted average Operating Partnership units outstanding (1) - diluted 269,868 310,850 294,137 (1) Includes weighted average deferred share units granted to certain members of the Board of Directors. (2) Less than 0.1 million units related to outstanding share-based compensation awards were excluded due to being antidilutive for each of the years ended December 31, 2021, December 31, 2020 and December 31, 2019.

Earnings Per Operating Partners

Earnings Per Operating Partnership Unit	12 Months Ended
Earnings Per Operating Partnership Unit	Dec. 31, 2021
Earnings Per Share [Abstract]
EARNINGS PER OPERATING PARTNERSHIP UNIT	EARNINGS PER CLASS A SHARE The table below provides earnings and the number of Class A shares used in the computations of “basic” earnings per share, which utilizes the weighted average number of Class A shares outstanding without regard to dilutive potential Class A shares, and “diluted” earnings per share, which includes all such shares. Diluted earnings per Class A share does not assume conversion of the Operating Partnership units held by MGM as such conversion would be antidilutive. Earnings per share has not been presented for the Class B shareholder as the Class B share is not entitled to any economic rights in the Company. Twelve Months Ended December 31, 2021 2020 2019 (in thousands) Numerator: Income from continuing operations, net of tax $ 359,240 $ 160,371 $ 259,349 Less: Income from continuing operations attributable to noncontrolling interest (153,737) (84,242) (173,871) Income from continuing operations attributable to Class A shares - basic and diluted 205,503 76,129 85,478 Income from discontinued operations, net of tax — — 16,216 Less: Income from discontinued operations attributable to noncontrolling interest — — (11,434) Income from discontinued operations attributable to Class A shares - basic and diluted — — 4,782 Net income attributable to Class A shares - basic and diluted $ 205,503 $ 76,129 $ 90,260 Denominator: Weighted average Class A shares outstanding (1) - basic 151,000 129,491 93,047 Effect of dilutive shares for diluted net income per Class A share (2) 194 162 252 Weighted average Class A shares outstanding (1) - diluted 151,194 129,653 93,299 (1) Includes weighted average deferred share units granted to certain members of the board of directors. (2) Less than 0.1 million shares related to outstanding share-based compensation awards were excluded due to being antidilutive for each of the years ended December 31, 2021, December 31, 2020 and December 31, 2019. The table below provides earnings and the number of Operating Partnership units used in the computations of “basic” earnings per Operating Partnership unit, which utilizes the weighted average number of Operating Partnership units outstanding without regard to dilutive potential Operating Partnership units, and “diluted” earnings per Operating Partnership units, which includes all such Operating Partnership units. Twelve Months Ended December 31, 2021 2020 2019 (in thousands) Numerator: Income from continuing operations, net of tax, attributable to unitholders - basic and diluted $ 359,240 $ 160,371 $ 259,349 Income from discontinued operations, net of tax - basic and diluted — — 16,216 Net income attributable to unitholders - basic and diluted $ 359,240 $ 160,371 $ 275,565 Denominator: Weighted average Operating Partnership units outstanding (1) - basic 269,674 310,688 293,885 Effect of dilutive shares for diluted net income per Operating Partnership unit (2) 194 162 252 Weighted average Operating Partnership units outstanding (1) - diluted 269,868 310,850 294,137 (1) Includes weighted average deferred share units granted to certain members of the Board of Directors. (2) Less than 0.1 million units related to outstanding share-based compensation awards were excluded due to being antidilutive for each of the years ended December 31, 2021, December 31, 2020 and December 31, 2019.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
Commitments and Contingencies	Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES Litigation. In the ordinary course of business, from time to time, the Company expects to be subject to legal claims and administrative proceedings, none of which are currently outstanding, which the Company believes could have, individually or in the aggregate, a material adverse effect on its business, financial position, results of operations, or cash flows.

Schedule III - Real Estate and

Schedule III - Real Estate and Accumulated Depreciation	12 Months Ended
Schedule III - Real Estate and Accumulated Depreciation	Dec. 31, 2021
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation Disclosure [Abstract]
SCHEDULE III - REAL ESTATE AND ACCUMULATED DEPRECIATION	SCHEDULE III — REAL ESTATE AND ACCUMULATED DEPRECIATION (in thousands) December 31, 2021 Acquisition Costs Costs Capitalized Subsequent to Acquisition Gross Amount (a) Property (b) (f) Encumbrances Land Building, Improvements and Other Land Building, Improvements and Other Land Building, Improvements and Other Total Accumulated Depreciation Year Acquired (c) Useful Life Investment Properties: New York-New York (e) d $ 183,010 $ 585,354 $ — $ — $ 183,010 $ 584,230 $ 767,240 $ (362,352) 2016 g The Mirage d 1,017,562 760,222 — — 1,017,562 746,186 1,763,748 (560,213) 2016 g Luxor d 440,685 710,796 — — 440,685 699,688 1,140,373 (417,117) 2016 g Excalibur d 814,805 342,685 — 43,945 814,805 383,474 1,198,279 (182,047) 2016 g Park MGM d 291,035 376,625 — 103,406 291,035 362,743 653,778 (147,077) 2016 g Beau Rivage d 104,945 561,457 — — 104,945 550,728 655,673 (298,870) 2016 g MGM Grand Detroit d 52,509 597,324 — — 52,509 596,675 649,184 (221,588) 2016 g Gold Strike Tunica d 3,609 179,146 — — 3,609 177,766 181,375 (101,710) 2016 g Borgata d 35,568 1,264,432 — — 35,568 1,249,272 1,284,840 (187,546) 2016 g MGM National Harbor — — 1,183,909 — — — 1,204,911 1,204,911 (203,663) 2017 g MGM Northfield Park d 392,500 376,842 — — 392,500 373,324 765,824 (47,078) 2018 g Empire City — 95,000 530,000 — — 95,000 530,000 625,000 (72,051) 2019 g MGM Springfield — 91,318 682,330 — — 91,318 682,330 773,648 (82,350) 2021 g 3,522,546 8,151,122 — 147,351 3,522,546 8,141,327 11,663,873 (2,883,662) Corporate Property: MGP Corporate Office — 488 — 192 — 681 681 (371) 2017 g $ 3,522,546 $ 8,151,610 $ — $ 147,543 $ 3,522,546 $ 8,142,008 $ 11,664,554 $ (2,884,033) (a) The aggregate cost of land, buildings and improvements for federal income tax purposes is approximately $8.9 billion. (b) All of the properties are large-scale destination entertainment and gaming-related properties, with the exception of MGP Corporate Office. See “Item 1 — Business — Our Properties” for additional detail about our properties. (c) We have omitted the date of construction of our properties on the basis that compiling this disclosure on a site-by-site basis would be impracticable because the majority of the real estate assets were constructed by other companies prior to acquisition and have had additions, expansions, and renovations subsequent to the original construction. (d) The assets comprising these Properties collectively secure the entire amount of the Operating Partnership’s senior secured credit facility. (e) Includes The Park dining and entertainment district. (f) This schedule does not include properties owned by MGP BREIT Venture. (g) Depreciation is computed based on the following estimated useful lives: Buildings and building improvements 20 to 40 years Land improvements 10 to 20 years Fixtures and integral equipment 3 to 20 years Reconciliation of Real Estate 2021 2020 2019 Balance at beginning of year $ 10,857,338 $ 13,924,496 $ 13,318,334 Additions (1) 773,648 — 625,000 Dispositions and write-offs (2) (4,666) (3,067,158) (27,377) Other 38,234 — 8,539 Balance at end of year $ 11,664,554 $ 10,857,338 $ 13,924,496 (1) 2021 includes $773.6 million resulting from the Operating Partnership’s acquisition of the real estate assets of MGM Springfield. 2019 includes $625.0 million resulting from the Operating Partnership’s acquisition of the real estate assets of Empire City. (2) 2020 includes $3.1 billion resulting from the contribution of Mandalay Bay to MGP BREIT Venture as part of the MGP BREIT Venture Transaction. Reconciliation of Accumulated Depreciation 2021 2020 2019 Balance at beginning of year $ (2,546,601) $ (3,096,524) $ (2,812,205) Depreciation expense (235,485) (236,853) (294,705) Dispositions and write-offs (1) 2,956 786,776 16,533 Additions and other (2) (104,903) — (6,147) Balance at end of year $ (2,884,033) $ (2,546,601) $ (3,096,524) (1) 2020 includes $785.3 million relating to the contribution of Mandalay Bay to MGP BREIT Venture as part of the MGP BREIT Venture Transaction. (2) 2021 includes $78.0 million resulting from the Operating Partnership’s acquisition of the real estate assets of MGM Springfield.

Basis of Presentation and Sum_2

Basis of Presentation and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2021
Accounting Policies [Abstract]
Basis of presentation	Basis of presentation. The accompanying consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) set forth in the Accounting Standards Codification (“ASC”), as published by the Financial Accounting Standards Board (“FASB”), and with the applicable rules and regulations of the Securities and Exchange Commission (“SEC”). The accompanying consolidated financial statements of MGP and the Operating Partnership represent the results of operations, financial positions and cash flows of MGP and the Operating Partnership, including their respective subsidiaries.
Principles of consolidation	Principles of consolidation. The Company identifies entities for which control is achieved through means other than voting rights and to determine which business enterprise is the primary beneficiary of variable interest entities (“VIE”). A VIE is an entity in which either (i) the equity investors as a group, if any, lack the power through voting or similar rights to direct the activities of such entity that most significantly impact such entity’s economic performance or (ii) the equity investment at risk is insufficient to finance that entity’s activities without additional subordinated financial support. The Company identifies the primary beneficiary of a VIE as the enterprise that has both of the following characteristics: (i) the power to direct the activities of the VIE that most significantly impact the entity’s economic performance; and (ii) the obligation to absorb losses or receive benefits of the VIE that could potentially be significant to the entity. The Company consolidates its investment in a VIE when it determines that it is its primary beneficiary. The Company may change its original assessment of a VIE upon subsequent events such as the modification of contractual arrangements that affect the characteristics or adequacy of the entity’s equity investments at risk and the disposition of all or a portion of an interest held by the primary beneficiary. The Company performs this analysis on an ongoing basis. The consolidated financial statements of MGP include the accounts of the Operating Partnership, a VIE of which the Company is the primary beneficiary, as well as its wholly owned and majority-owned subsidiaries, which represents all of MGP’s assets and liabilities. As MGP holds what is deemed a majority voting interest in the Operating Partnership through its ownership of the Operating Partnership’s sole general partner, it qualifies for the exemption from providing certain of the required disclosures associated with investments in VIEs. The consolidated financial statements of the Operating Partnership include the accounts of its wholly owned subsidiary, MGP Lessor LLC, which is the MGM-MGP Master Lease landlord, a VIE of which the Operating Partnership is the primary beneficiary. As of December 31, 2021, on a consolidated basis, MGP Lessor, LLC had total assets of $8.9 billion primarily related to its real estate investments and total liabilities of $599.9 million primarily related to its deferred revenue and operating lease liabilities. For entities determined not to be VIEs, the Company consolidates such entities in which the Company owns 100% of the equity. For entities in which the Company owns less than 100% of the equity interest, the Company consolidates the entity under the voting interest model if it has controlling financial interest based upon the terms of the respective entities’ ownership agreements. If the entity
Noncontrolling interest	Noncontrolling interest. MGP presents noncontrolling interest and classifies such interest as a component of consolidated shareholders’ equity, separate from the Company’s Class A shareholders’ equity. Noncontrolling interest in MGP represents Operating Partnership units currently held by subsidiaries of MGM. Comprehensive income or loss of the Operating Partnership is allocated to its noncontrolling interest based on the noncontrolling interest’s ownership percentage in the Operating Partnership except for income tax expenses as discussed in Note 9. Ownership percentage is calculated by dividing the number of Operating Partnership units held by the noncontrolling interest by the total Operating Partnership units held by the noncontrolling interest and the Company. Issuance of additional Class A shares and Operating Partnership units changes the ownership interests of both the noncontrolling interest and the Company. Such transactions and the related proceeds are treated as capital transactions.
Use of estimates	Use of estimates. The consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America. These principles require the Company’s management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.
Redeemable noncontrolling interest and redeemable capital	Redeemable noncontrolling interest and redeemable capital. As discussed in Note 1, on January 14, 2020 the Operating Partnership agreed to waive its right following the closing of the MGP BREIT Venture Transaction to issue MGP Class A shares, in lieu of cash, to settle redemptions of Operating Partnership units held by MGM up to a maximum cash redemption amount of $1.4 billion. In connection with the waiver, the Operating Partnership and the Company reclassified, from permanent equity to temporary equity, the carrying value of Operating Partnership units that could require cash redemption and remeasured the units to their redemption value. The Operating Partnership units that comprised the $1.4 billion redemption amount were determined based on a 3% discount to the ten-day average closing price prior to the date of determination. At each subsequent reporting period, the carrying value of temporary equity was remeasured to the greater of: (1) the carrying value of the number of units then considered redeemable, inclusive of the comprehensive income and losses attributed based on a per unit or share basis in accordance with ASC 810 or (2) the redemption value of the number of units that are then redeemable based on the remaining aggregate cash redemption amount and the per share redemption value, except that decreases in the per unit or share redemption were limited to the amount of previous increases, with the differences between the carrying value and the remeasured value being recorded as an adjustment in additional paid-in capital (in lieu of retained earnings) or limited partners’ capital. The $1.4 billion maximum cash redemption amount was completed by the $700 million redeemed on May 18, 2020 and the $700 million redeemed on December 2, 2020.
Investment in and advances to unconsolidated affiliate	Investment in and advances to unconsolidated affiliate. The Company has an investment in an unconsolidated affiliate accounted for under the equity method, which is currently comprised of MGP BREIT Venture. Under the equity method, carrying value is adjusted for the Company’s share of the investee’s earnings and losses, as well as distributions from the investee. The Company classifies its share of investee’s earnings as a component of “Other income (expense)”, as the Company’s investment in such unconsolidated affiliate is an extension of the Company’s core business operations.
Real estate investments	Real estate investments. Real estate investments consist of land, buildings, improvements and integral equipment. The majority of the Company’s real property was contributed or acquired by the Operating Partnership from MGM as transactions between entities under common control, and as a result, such real estate was initially recorded by the Company at MGM’s historical cost basis, less accumulated depreciation (i.e., there was no change in the basis of the contributed assets), as of the contribution or acquisition dates. Costs of maintenance and repairs to real estate investments are the responsibility of the tenant under the MGM-MGP Master Lease. Based upon the terms of the MGM-MGP Master Lease, although the tenant is responsible for all capital expenditures during the term of the lease, if, in the future, a deconsolidation event occurs, the Company will be required to pay the tenant, should the tenant so elect, for certain capital improvements that would not constitute “normal tenant improvements” in accordance with U.S. GAAP in effect at lease commencement (i.e. ASC 840) (“Non-Normal Tenant Improvements”), subject to an initial cap of $100 million in the first year of the lease increasing annually by $75 million each year thereafter. The Company will be entitled to receive additional rent based on the 10-year treasury yield plus 600 basis points multiplied by the value of the new capital improvements the Company is required to pay for in connection with a deconsolidation event and such capital improvements will be subject to the terms of the lease. Examples of Non-Normal Tenant Improvements include the costs of structural elements at the properties, including capital improvements that expand the footprint or square footage of any of the properties or extend the useful life of the properties, as well as equipment that would be a necessary improvement at any of the properties, including initial installation of elevators, air conditioning systems or electrical wiring. Inception-to-date Non-Normal Tenant Improvements were $48.4 million through December 31, 2021.
Depreciation and property transactions	In accordance with accounting standards governing the impairment or disposal of long-lived assets, the carrying value of long-lived assets, including land, buildings and improvements, land improvements and integral equipment is evaluated whenever events or changes in circumstances indicate that a potential impairment has occurred relative to a given asset or assets. Factors that could result in an impairment review include, but are not limited to, a current period cash flow loss combined with a history of cash flow losses, current cash flows that may be insufficient to recover the investment in the property over the remaining useful life, a projection that demonstrates continuing losses associated with the use of a long-lived asset, significant changes in the manner of use of the assets or significant changes in business strategies. If such circumstances arise, the Company uses an estimate of the undiscounted value of expected future operating cash flows to determine whether the long-lived assets are impaired. If the aggregate undiscounted cash flows plus net proceeds expected from disposition of the assets (if any) are less than the carrying amount of the assets, the resulting impairment charge to be recorded is calculated based on the excess of the carrying value of the assets over the fair value of such assets, with the fair value determined based on an estimate of discounted future cash flows, appraisals or other valuation techniques. There were no impairment charges related to long-lived assets recognized during the years ended December 31, 2021, 2020, and 2019. Depreciation and property transactions. Depreciation expense is recognized over the useful lives of real estate investments applying the straight-line method over the following estimated useful lives, which are periodically reviewed: Buildings and building improvements 20 to 40 years Land improvements 10 to 20 years Furniture, fixtures and equipment 3 to 20 years Property transactions, net are comprised of transactions related to long-lived assets, such as gains and losses on the disposition of assets.
Lease incentive asset	Lease incentive asset. The Company’s lease incentive asset consists of the consideration paid to MGM as part of the Park MGM Transaction, net of the deferred revenue balance associated with Non-Normal Tenant Improvements related to Park MGM, which was derecognized. The Company amortizes the lease incentive asset as a reduction of rental revenue over the remaining term of the MGM-MGP Master Lease.
Deferred revenue and Revenue recognition	Deferred revenue. The Company received nonmonetary consideration related to Non-Normal Tenant Improvements as they become MGP’s property pursuant to the MGM-MGP Master Lease and recognized the cost basis of Non-Normal Tenant Improvements as real estate investments and deferred revenue. The Company depreciates the real estate investments over their estimated useful lives and amortizes the deferred revenue as additional rental revenue over the remaining term of the MGM-MGP Master Lease once the related real estate investments were placed in service. Revenue recognition. Rental revenue under the MGM-MGP Master Lease, which is accounted for as an operating lease, is recognized on a straight-line basis over the non-cancelable term and reasonably certain renewal periods, which includes the initial lease term of ten years and all four additional five-year terms under the lease, for all contractual revenues that are determined to be fixed and measurable, payment has been received or collectability is probable. The difference between such rental revenue earned and the cash rent due under the provisions of the lease is recorded as deferred rent receivable and included as a component of “Prepaid expenses and other assets” in the consolidated balance sheets or as “Deferred revenue” in the consolidated balance sheets if cash rent due exceeds rental revenue earned. “Ground lease and other” on the consolidated statements of operations reflects the non-cash ground lease revenue from the tenant and the amortization of deferred revenue relating to Non-Normal Tenant Improvements. Northfield generated gaming, food, beverage and other revenue, which primarily consisted of video lottery terminal (“VLT ” ) wager transactions and food and beverage transactions and such revenue relating to the operations of Northfield is classified as discontinued operations in 2019. Refer to Note 3 for further information.
Lessee leases	Lessee leases. The Company determines if an arrangement is or contains a lease at inception or modification of the arrangement. An arrangement is or contains a lease if there are identified assets and the right to control the use of an identified asset is conveyed for a period in exchange for consideration. Control over the use of the identified asset means the lessee has both the right to obtain substantially all of the economic benefits from the use of the asset and the right to direct the use of the asset. For leases with terms greater than twelve months, the operating lease right-of-use (“ROU”) assets and operating lease liabilities are recognized based on the present value of the future minimum lease payments over the lease term at commencement date. The initial measurement of the operating lease ROU assets also includes any prepaid lease payments and are reduced by any previously accrued deferred rent. When available, the Company uses the rate implicit in the lease to discount lease payments to present value; however, the Company’s leases do not provide a readily determinable implicit rate. Therefore, the Company uses its incremental borrowing rate to discount the lease payments based on the information available at commencement date. Certain of the Company’s leases include fixed rental escalation clauses that are factored into the determination of lease payments. Lease terms include options to extend or terminate the lease when it is reasonably certain that such option will be exercised. Lease expense for minimum lease payments is recognized on a straight-line basis over the expected lease term.
Cash and cash equivalents	Cash and cash equivalents. Cash and cash equivalents include investments and interest-bearing instruments with maturities of 90 days or less at the date of acquisition. Such investments are carried at cost, which approximates market value.
Ground lease and other reimbursable expenses	Ground lease expenses. Ground lease expenses arise from costs which include ground lease rent paid directly by the tenant pursuant to the third-party lessor on behalf of the Company.
Acquisition-related expenses	Acquisition-related expenses. The Company expenses transaction costs associated with completed or announced acquisitions in the period in which they are incurred. These costs are included in “Acquisition-related expenses” within the consolidated statements of operations.
General and administrative	General and administrative. General and administrative expenses primarily include the salaries and benefits of employees and external consulting costs. In addition, pursuant to a corporate services agreement between the Operating Partnership and MGM (the “Corporate Services Agreement”), MGM provides the Operating Partnership and its subsidiaries with financial, administrative and operational support services, including accounting and finance support, human resources support, legal and regulatory compliance support, insurance advisory services, internal audit services, governmental affairs monitoring and reporting services, information technology support, construction services and various other support services. MGM is reimbursed for all costs it incurs directly related to providing the services thereunder.
Deferred financing costs	Deferred financing costs. Deferred financing costs were incurred in connection with the issuance of the term loan facilities, revolving credit facility and senior notes. Costs incurred in connection with term loan facilities and senior notes were capitalized and offset against the carrying amount of the related indebtedness. Costs incurred in connection with the Operating Partnership’s revolving credit facility are capitalized as a component of prepaid expenses and other assets. These costs are amortized over the term of the indebtedness and are included in interest expense in the consolidated statement of operations.
Concentrations of credit risk	Concentrations of credit risk. As of December 31, 2021, all of the Company’s real estate properties have been leased to MGM and all of the Company’s revenues for the period ending December 31, 2021 are derived from the MGM-MGP Master Lease with MGM.
Derivative financial instruments	Derivative financial instruments. The Company accounts for its derivatives in accordance with FASB ASC Topic 815, Derivatives and Hedging , in which all derivative instruments are reflected at fair value as either assets or liabilities. For derivative instruments that are designated and qualify as hedging instruments, the Company records the gain or loss on the hedge instruments as a component of accumulated other comprehensive income. For derivative instruments that are not designated and do not quality as hedging instruments, the Company records the gain or loss on the derivative instruments as ”Gain (loss) on unhedged interest rate swaps, net” on the consolidated statements of operations.
Fair value measurements	Fair value measurements . Fair value measurements are utilized in the accounting and impairment assessments of the Company’s real estate investments. investment in unconsolidated affiliate, and certain of its financial assets and liabilities. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date and is measured according to a hierarchy that includes: Level 1 inputs, such as quoted prices in an active market; Level 2 inputs, which are observable inputs for similar assets; or Level 3 inputs, which are unobservable inputs. The Company used the following inputs in its fair value measurements: • Level 2 inputs for its debt fair value disclosures. See Note 7; and
Reportable segment	Reportable segment. The Company’s operations consist of investments in real estate, both wholly owned and through its investment in MGP BREIT Venture, for which all such real estate properties are similar to one another in that they consist of large-scale destination entertainment and leisure properties and related offerings, whose tenants generally offer casino gaming, hotel, convention, dining, entertainment and retail amenities, have similar economic characteristics and are governed by triple-net operating leases. The operating results of the Company’s wholly owned and equity method real estate investments are regularly reviewed, in the aggregate, by the chief operating decision maker. As such, the Company has one reportable segment.

Basis of Presentation and Sum_3

Basis of Presentation and Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2021
Accounting Policies [Abstract]
Redeemable Noncontrolling Interest	The components of equity that related to the Company’s redeemable noncontrolling interest and the Operating Partnership’s redeemable capital were as follows: (in thousands) As of January 14, 2020 $ — Reclassification and remeasurement adjustments 1,405,058 Attribution of: Net income 12,079 Redemption of temporary equity (1,392,468) MGP's issuance of Class A shares and Operating Partnership's issuance of units 18,418 MGP BREIT Venture Transaction 16,136 Cash flow hedges (12,995) Share-based compensation 292 Deemed contribution - tax sharing agreement 1,047 MGP Dividends and Operating Partnership distributions declared (46,887) Other (680) As of December 31, 2020 $ —
Useful Lives of Property and Equipment Used in Operations	Depreciation expense is recognized over the useful lives of real estate investments applying the straight-line method over the following estimated useful lives, which are periodically reviewed: Buildings and building improvements 20 to 40 years Land improvements 10 to 20 years Furniture, fixtures and equipment 3 to 20 years

Acquisitions and Dispositions (

Acquisitions and Dispositions (Tables)	12 Months Ended
Acquisitions and Dispositions (Tables)	Dec. 31, 2021
Business Combinations [Abstract]
Results of discontinued operations	The results of the Northfield OpCo discontinued operations are summarized as follows: Year Ended December 31, 2019 (in thousands) Total revenues $ 67,841 Total expenses (48,735) Income from discontinued operations before income taxes 19,106 Provision for income taxes (2,890) Income from discontinued operations, net of tax 16,216 Less: Income attributable to noncontrolling interests - discontinued operations (11,434) Income from discontinued operations attributable to Class A shareholders $ 4,782

Real Estate Investments (Tables

Real Estate Investments (Tables)	12 Months Ended
Real Estate Investments (Tables)	Dec. 31, 2021
Real Estate [Abstract]
Carrying Value of Real Estate Investments	The carrying value of real estate investments is as follows: December 31, 2021 2020 (in thousands) Land $ 3,522,546 $ 3,431,228 Buildings, building improvements, land improvements and integral equipment 8,142,008 7,426,110 11,664,554 10,857,338 Less: Accumulated depreciation (2,884,033) (2,546,601) $ 8,780,521 $ 8,310,737

Investment in Unconsolidated _2

Investment in Unconsolidated Affiliate - (Tables)	12 Months Ended
Investment in Unconsolidated Affiliate - (Tables)	Dec. 31, 2021
Equity Method Investments and Joint Ventures [Abstract]
Summary of Equity Method Investments	Summarized balance sheet information of MGP BREIT Venture is as follows: December 31, 2021 2020 (in thousands) Real estate investments, net $ 4,439,851 $ 4,523,638 Other assets 193,200 95,342 Debt, net 2,994,782 2,994,269 Other liabilities 8,018 7,811 Summarized results of operations of MGP BREIT Venture are as follows: Year ended December 31, 2021 2020 (in thousands) Net revenues $ 394,725 $ 346,481 Net income 201,246 177,757

Leases (Tables)

Leases (Tables)	12 Months Ended
Leases (Tables)	Dec. 31, 2021
Leases [Abstract]
Future Noncancelable Minimum Rental Payments	Under the MGM-MGP Master Lease, future non-cancelable minimum cash rental payments, which are the payments under the initial 10-year term through April 30, 2026 and do not include renewal options and, with respect to MGM National Harbor, through August 31, 2024, are as follows as of December 31, 2021: Year ending December 31, (in thousands) 2022 $ 812,086 2023 791,861 2024 760,161 2025 696,760 2026 232,253 Thereafter — Total $ 3,293,121
Lease Costs	Other information related to the Company’s operating leases was as follows: Supplemental balance sheet information December 31, 2021 December 31, 2020 Weighted average remaining lease term (years) 56 58 Weighted average discount rate (%) 7 % 7 %
Maturity of Operating Lease Liability	Maturities of operating lease liabilities were as follows: Year ending December 31, (in thousands) 2022 $ 24,603 2023 24,478 2024 24,449 2025 24,449 2026 24,449 Thereafter 1,249,430 Total future minimum lease payments 1,371,858 Less: Amount of lease payments representing interest (1,034,398) Total $ 337,460

Debt (Tables)

Debt (Tables)	12 Months Ended
Debt (Tables)	Dec. 31, 2021
Debt Disclosure [Abstract]
Schedule of Debt	Debt consists of the following: December 31, 2021 2020 (in thousands) Senior secured revolving credit facility $ 50,000 $ 10,000 5.625% senior notes, due 2024 1,050,000 1,050,000 4.625% senior notes, due 2025 800,000 800,000 4.50% senior notes, due 2026 500,000 500,000 5.75% senior notes, due 2027 750,000 750,000 4.50% senior notes, due 2028 350,000 350,000 3.875% senior notes, due 2029 750,000 750,000 4,250,000 4,210,000 Less: Unamortized discount and debt issuance costs (33,123) (41,041) $ 4,216,877 $ 4,168,959
Maturities of the Principal Amount of Debt	Maturities of the principal amount of the Operating Partnership’s debt as of December 31, 2021 are as follows: Year ending December 31, (in thousands) 2022 $ — 2023 50,000 2024 1,050,000 2025 800,000 2026 500,000 Thereafter 1,850,000 $ 4,250,000

Derivatives and Hedging Activ_2

Derivatives and Hedging Activities (Tables)	12 Months Ended
Derivatives and Hedging Activities (Tables)	Dec. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Interest Rate Swaps	The interest rate swaps as of December 31, 2021 are summarized in the table below. Notional Amount Weighted Average Fixed Rate Fair Value Liability Effective Date Maturity Date (in thousands, except percentages) Derivatives designated as hedges: $ 900,000 1.940 % $ (25,299) June 30, 2022 June 30, 2027 $ 900,000 $ (25,299) Derivatives not designated as hedges: $ 300,000 1.158 % $ (969) September 6, 2019 December 31, 2024 400,000 2.252 % (26,319) October 1, 2019 December 31, 2029 $ 700,000 $ (27,288) $ (52,587) The interest rate swaps as of December 31, 2020 are summarized in the table below. Notional Amount Weighted Average Fixed Rate Fair Value Liability Effective Date Maturity Date (in thousands, except percentages) Derivatives designated as hedges: $ 900,000 1.801 % $ (41,131) November 30, 2021 December 31, 2024 $ 900,000 $ (41,131) Derivatives not designated as hedges: $ 1,200,000 1.844 % $ (18,889) May 3, 2017 November 30, 2021 300,000 1.158 % (10,451) September 6, 2019 December 31, 2024 400,000 2.252 % (48,453) October 1, 2019 December 31, 2029 $ 1,900,000 $ (77,793) $ (118,924)

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
Income Taxes (Tables)	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Provision for Income Taxes Attributable to Income (Loss) Before Income Taxes	The provision for income taxes on continuing operations is as follows: Year Ended December 31, 2021 2020 2019 (in thousands) Federal: Deferred $ — $ — $ (1,058) Provision for federal income taxes on continuing operations $ — $ — $ (1,058) State: Current $ 9,344 $ 6,345 $ 7,309 Deferred (16) 3,389 1,347 Provision for state income taxes on continuing operations $ 9,328 $ 9,734 $ 8,656
Reconciliation of Federal Income Tax Statutory Rate and Effective Tax Rate	A reconciliation of the federal income tax statutory rate and the Company’s effective tax rate on income from continuing operations is as follows: Year Ended December 31, 2021 2020 2019 Federal income tax statutory rate 21.0 % 21.0 % 21.0 % Income not subject to federal income tax (21.0) (21.0) (21.4) State taxes 2.5 5.7 3.2 Effective tax rate on income from continuing operations 2.5 % 5.7 % 2.8 %
Major Tax-Effected Components of Net Deferred Tax Liability	The major tax-effected components of the Company’s net deferred tax liability are as follows: December 31, 2021 2020 (in thousands) Deferred tax liability – federal and state Real estate investments, net $ (41,217) $ (33,298) Total deferred tax liability (41,217) (33,298) Net deferred tax liability $ (41,217) $ (33,298)

Shareholders' Equity and Part_2

Shareholders' Equity and Partners' Capital (Tables)	12 Months Ended
Shareholders' Equity and Partners' Capital (Tables)	Dec. 31, 2021
Equity [Abstract]
Changes in Company's ownership percentage interest in subsidiary	The following discloses the effects of changes in the Company’s ownership percentage interest in its subsidiary, the Operating Partnership, on the Class A shareholders’ equity: For the years ended 2021 2020 2019 (in thousands) Net income attributable to MGM Growth Properties $ 205,503 $ 76,129 $ 90,260 Transfers from/(to) noncontrolling interest: Empire City Transaction — — 23,745 Issuance of Class A shares 656,361 442,717 1,049,582 Park MGM Transaction — — 2,496 Northfield OpCo Transaction — — (27,439) MGP BREIT Venture Transaction — 8,287 — Redemption of temporary equity — (114,924) — Redemption of Operating Partnership units (227,487) — — Other (840) 1,275 1,183 Net transfers from noncontrolling interest 428,034 337,355 1,049,567 Change from net income attributable to MGM Growth Properties and transfers to noncontrolling interest $ 633,537 $ 413,484 $ 1,139,827
Changes in Accumulated Other Comprehensive Income	The following table summarizes the changes in accumulated other comprehensive income (loss) by component: Cash Flow Hedges Other Total (in thousands) Balance at December 31, 2018 $ 4,306 $ (98) $ 4,208 Other comprehensive loss before reclassifications (34,476) — (34,476) Amounts reclassified from accumulated other comprehensive loss to interest expense (5,599) — (5,599) Amounts reclassified from accumulated other comprehensive loss to (gain)/loss on unhedged interest rate swaps 4,877 — 4,877 Other comprehensive loss (35,198) — (35,198) Other changes in accumulated other comprehensive loss: Empire City Transaction — (195) (195) Issuance of Class A shares — (1,512) (1,512) Park MGM Transaction — (16) (16) Northfield OpCo Transaction — 2 2 Changes in accumulated other comprehensive loss: (35,198) (1,721) (36,919) Less: Other comprehensive loss attributable to noncontrolling interest 25,666 — 25,666 Balance at December 31, 2019 (5,226) (1,819) (7,045) Other comprehensive loss before reclassifications (104,999) — (104,999) Amounts reclassified from accumulated other comprehensive loss to interest expense 17,922 — 17,922 Amounts reclassified from accumulated other comprehensive loss to (gain)/loss on unhedged interest rate swaps (2,547) — (2,547) Other comprehensive loss (89,624) — (89,624) Other changes in accumulated other comprehensive loss: Issuance of Class A shares — (646) (646) MGP BREIT Venture Transaction — 59 59 Redemption of temporary equity — (8,773) (8,773) Other — 45 45 Changes in accumulated other comprehensive loss: (89,624) (9,315) (98,939) Less: Other comprehensive loss attributable to noncontrolling interest 54,787 — 54,787 Balance at December 31, 2020 (40,063) (11,134) (51,197) Other comprehensive income before reclassifications 16,378 — 16,378 Amounts reclassified from accumulated other comprehensive loss to interest expense 22,200 — 22,200 Other comprehensive income 38,578 — 38,578 Other changes in accumulated other comprehensive loss: Issuance of Class A shares — (4,172) (4,172) Redemption of Operating Partnership units — (6,860) (6,860) Other — (25) (25) Changes in accumulated other comprehensive loss: 38,578 (11,057) 27,521 Less: Other comprehensive income attributable to noncontrolling interest (17,513) — (17,513) Balance at December 31, 2021 $ (18,998) $ (22,191) $ (41,189)
Dividends Declared	A summary of the Company’s stock distributions for the years ended December 31, 2021, 2020, and 2019 is as follows: Year Ended December 31, 2021 2020 2019 Non-qualified dividends $ 1.6363 81.11 % $ 1.4649 76.30 % $ 1.6134 87.21 % Return of capital 0.3812 18.89 % 0.4551 23.70 % 0.2366 12.79 % Total $ 2.0175 100.00 % $ 1.9200 100.00 % $ 1.8500 100.00 %

Earnings Per Class A Share (Tab

Earnings Per Class A Share (Tables)	12 Months Ended
Earnings Per Class A Share (Tables)	Dec. 31, 2021
Earnings Per Share [Abstract]
Basic and Diluted Net Income Per Class A Share	The table below provides earnings and the number of Class A shares used in the computations of “basic” earnings per share, which utilizes the weighted average number of Class A shares outstanding without regard to dilutive potential Class A shares, and “diluted” earnings per share, which includes all such shares. Diluted earnings per Class A share does not assume conversion of the Operating Partnership units held by MGM as such conversion would be antidilutive. Earnings per share has not been presented for the Class B shareholder as the Class B share is not entitled to any economic rights in the Company. Twelve Months Ended December 31, 2021 2020 2019 (in thousands) Numerator: Income from continuing operations, net of tax $ 359,240 $ 160,371 $ 259,349 Less: Income from continuing operations attributable to noncontrolling interest (153,737) (84,242) (173,871) Income from continuing operations attributable to Class A shares - basic and diluted 205,503 76,129 85,478 Income from discontinued operations, net of tax — — 16,216 Less: Income from discontinued operations attributable to noncontrolling interest — — (11,434) Income from discontinued operations attributable to Class A shares - basic and diluted — — 4,782 Net income attributable to Class A shares - basic and diluted $ 205,503 $ 76,129 $ 90,260 Denominator: Weighted average Class A shares outstanding (1) - basic 151,000 129,491 93,047 Effect of dilutive shares for diluted net income per Class A share (2) 194 162 252 Weighted average Class A shares outstanding (1) - diluted 151,194 129,653 93,299 (1) Includes weighted average deferred share units granted to certain members of the board of directors. (2) Less than 0.1 million shares related to outstanding share-based compensation awards were excluded due to being antidilutive for each of the years ended December 31, 2021, December 31, 2020 and December 31, 2019. The table below provides earnings and the number of Operating Partnership units used in the computations of “basic” earnings per Operating Partnership unit, which utilizes the weighted average number of Operating Partnership units outstanding without regard to dilutive potential Operating Partnership units, and “diluted” earnings per Operating Partnership units, which includes all such Operating Partnership units. Twelve Months Ended December 31, 2021 2020 2019 (in thousands) Numerator: Income from continuing operations, net of tax, attributable to unitholders - basic and diluted $ 359,240 $ 160,371 $ 259,349 Income from discontinued operations, net of tax - basic and diluted — — 16,216 Net income attributable to unitholders - basic and diluted $ 359,240 $ 160,371 $ 275,565 Denominator: Weighted average Operating Partnership units outstanding (1) - basic 269,674 310,688 293,885 Effect of dilutive shares for diluted net income per Operating Partnership unit (2) 194 162 252 Weighted average Operating Partnership units outstanding (1) - diluted 269,868 310,850 294,137 (1) Includes weighted average deferred share units granted to certain members of the Board of Directors. (2) Less than 0.1 million units related to outstanding share-based compensation awards were excluded due to being antidilutive for each of the years ended December 31, 2021, December 31, 2020 and December 31, 2019.

Earnings Per Operating Partne_2

Earnings Per Operating Partnership Unit (Tables)	12 Months Ended
Earnings Per Operating Partnership Unit (Tables)	Dec. 31, 2021
Earnings Per Share [Abstract]
Basic and Diluted Net Income Per Operating Partnership Unit	The table below provides earnings and the number of Class A shares used in the computations of “basic” earnings per share, which utilizes the weighted average number of Class A shares outstanding without regard to dilutive potential Class A shares, and “diluted” earnings per share, which includes all such shares. Diluted earnings per Class A share does not assume conversion of the Operating Partnership units held by MGM as such conversion would be antidilutive. Earnings per share has not been presented for the Class B shareholder as the Class B share is not entitled to any economic rights in the Company. Twelve Months Ended December 31, 2021 2020 2019 (in thousands) Numerator: Income from continuing operations, net of tax $ 359,240 $ 160,371 $ 259,349 Less: Income from continuing operations attributable to noncontrolling interest (153,737) (84,242) (173,871) Income from continuing operations attributable to Class A shares - basic and diluted 205,503 76,129 85,478 Income from discontinued operations, net of tax — — 16,216 Less: Income from discontinued operations attributable to noncontrolling interest — — (11,434) Income from discontinued operations attributable to Class A shares - basic and diluted — — 4,782 Net income attributable to Class A shares - basic and diluted $ 205,503 $ 76,129 $ 90,260 Denominator: Weighted average Class A shares outstanding (1) - basic 151,000 129,491 93,047 Effect of dilutive shares for diluted net income per Class A share (2) 194 162 252 Weighted average Class A shares outstanding (1) - diluted 151,194 129,653 93,299 (1) Includes weighted average deferred share units granted to certain members of the board of directors. (2) Less than 0.1 million shares related to outstanding share-based compensation awards were excluded due to being antidilutive for each of the years ended December 31, 2021, December 31, 2020 and December 31, 2019. The table below provides earnings and the number of Operating Partnership units used in the computations of “basic” earnings per Operating Partnership unit, which utilizes the weighted average number of Operating Partnership units outstanding without regard to dilutive potential Operating Partnership units, and “diluted” earnings per Operating Partnership units, which includes all such Operating Partnership units. Twelve Months Ended December 31, 2021 2020 2019 (in thousands) Numerator: Income from continuing operations, net of tax, attributable to unitholders - basic and diluted $ 359,240 $ 160,371 $ 259,349 Income from discontinued operations, net of tax - basic and diluted — — 16,216 Net income attributable to unitholders - basic and diluted $ 359,240 $ 160,371 $ 275,565 Denominator: Weighted average Operating Partnership units outstanding (1) - basic 269,674 310,688 293,885 Effect of dilutive shares for diluted net income per Operating Partnership unit (2) 194 162 252 Weighted average Operating Partnership units outstanding (1) - diluted 269,868 310,850 294,137 (1) Includes weighted average deferred share units granted to certain members of the Board of Directors. (2) Less than 0.1 million units related to outstanding share-based compensation awards were excluded due to being antidilutive for each of the years ended December 31, 2021, December 31, 2020 and December 31, 2019.

Business (Detail)

Business (Detail) $ / shares in Units, $ in Thousands

Oct. 29, 2021USD ($)

Mar. 04, 2021USD ($)shares

Dec. 02, 2020USD ($)$ / sharesshares

May 18, 2020USD ($)$ / sharesshares

Feb. 14, 2020USD ($)extensiondebtInstrumentshares

Jan. 14, 2020USD ($)

Jan. 31, 2019USD ($)

Apr. 25, 2016

Mar. 31, 2021USD ($)

Feb. 14, 2020USD ($)shares

Jun. 30, 2022USD ($)shares

Dec. 31, 2021USD ($)classOfStockshares

Dec. 31, 2020USD ($)shares

Dec. 31, 2019USD ($)

Sep. 30, 2022$ / sharesshares

Dec. 13, 2021USD ($)

Apr. 01, 2020USD ($)

Mar. 07, 2019USD ($)

Jan. 29, 2019

Business And Organization [Line Items]

Number of classes of stock | classOfStock

Annual base rent

$ 23,800

Decrease in annual rent payments

(872,800)

$ (50,000)

Amount of Operating Partnership units redeemed

1,181,276

Cash payments to acquire assets

$ 400,000

$ 0

MGP BREIT Venture Transaction

Business And Organization [Line Items]

Number of shares offered in public offering (in shares) | shares

2,600,000

MGM Springfield

Business And Organization [Line Items]

Cash payments to acquire assets

$ 400,000

MGP Operating Partnership

Business And Organization [Line Items]

Ownership percentage acquired

58.50%

Purchase agreement cash amount discount rate

3.00%

Operating unit redemption consideration amount

$ 1,400,000

Stock redeemed during period (in shares) | shares

23,500,000

30,300,000

Amount of Operating Partnership units redeemed

$ 700,000

Price of redeemed unit (in usd per unit) | $ / shares

$ 23.10

Proceeds from issuance of equity

$ 1,200,000

Operating Partnership Units to MGP's Class A Shares

Business And Organization [Line Items]

Operating Partnership unit conversion ratio (in units)

MGM

Business And Organization [Line Items]

Ownership percentage required for voting rights

30.00%

Operating Partnership units held (in units) | shares

111,400,000

MGM | MGP Operating Partnership

Business And Organization [Line Items]

Increase in ownership interest in operating partnership

41.50%

MGM | MGP BREIT Venture Transaction

Business And Organization [Line Items]

Consideration received

$ 2,400,000

MGP Operating Partnership

Business And Organization [Line Items]

Operating partnership units outstanding (in units) | shares

268,123,082

279,966,531

Purchase agreement cash amount discount rate

3.00%

Operating unit redemption consideration amount

$ 1,400,000

Amount of Operating Partnership units redeemed

$ 700,000

Price of redeemed unit (in usd per unit) | $ / shares

$ 29.78

Cash payments to acquire assets

$ 400,000

$ 0

MGP Operating Partnership | MGP BREIT Venture Transaction

Business And Organization [Line Items]

Controlling interest

50.10%

Consideration received

$ 2,100,000

Equity value of venture

5.00%

MGP Operating Partnership | Subsidiaries

Business And Organization [Line Items]

Stock redeemed during period (in shares) | shares

37,100,000

Proceeds from issuance of equity

$ 1,200,000

Secured Debt | MGP BREIT Venture Transaction

Business And Organization [Line Items]

Indebtedness assumption

$ 1,300,000

Class A Shares

Business And Organization [Line Items]

Net proceeds from public offering of stock

$ 548,400

Class A Shares | MGP BREIT Venture Transaction

Business And Organization [Line Items]

Number of shares offered in public offering (in shares) | shares

4,900,000

Net proceeds from public offering of stock

$ 150,000

VICI Operating Partnership Unit | Forecast | VICI Properties Transaction

Business And Organization [Line Items]

Number of shares retained | shares

12,200,000

Blackstone Real Estate Income Trust, Inc. | MGP BREIT Venture Transaction

Business And Organization [Line Items]

Noncontrolling interest ownership percentage

49.90%

VICI Properties Inc. | Forecast | VICI Properties Transaction

Business And Organization [Line Items]

MGM National Harbor transaction

$ 4,400,000

VICI Properties Inc. | Class A Shares | Forecast | VICI Properties Transaction

Business And Organization [Line Items]

Conversion basis of shares | shares

1.366

Exchange ratio, price per share (in dollars per share) | $ / shares

$ 43

VICI Properties Inc. | VICI Operating Partnership Unit | Forecast | VICI Properties Transaction

Business And Organization [Line Items]

Conversion basis of shares | shares

1.366

MGP BREIT Venture Lease | Mandalay Bay and MGM Grand Las Vegas | Subsidiaries

Business And Organization [Line Items]

Term of contract

30 years

Number of options to extend | extension

Operating lease renewal term

10 years

Annual base rent

$ 292,000

Annual rent escalator for the first period

2.00%

Period of first escalating base rates

15 years

Annual escalating rates in second period

2.00%

Number of letters of credit in lease covenant | debtInstrument

Term of debt instrument covenants

1 year

MGP BREIT Venture Lease | Mandalay Bay | Subsidiaries

Business And Organization [Line Items]

Decrease in annual rent payments

$ 133,000

Base Rent

Business And Organization [Line Items]

Decrease in annual rent payments

$ (764,900)

Annual rent escalator rate

2.00%

Base Rent | MGM Springfield

Business And Organization [Line Items]

Decrease in annual rent payments

(30,000)

Fixed portion of rent

$ 27,000

Annual rent escalator rate

2.00%

Master Lease

Business And Organization [Line Items]

Annual rent escalator rate

2.00%

Master Lease | VICI Properties Inc.

Business And Organization [Line Items]

Reduction in annual cash rent

$ 90,000

Master Lease | Seminole Hard Rock Entertainment, Inc.

Business And Organization [Line Items]

Annual cash rent of new lease

$ 90,000

Maximum | MGP BREIT Venture Lease | Mandalay Bay and MGM Grand Las Vegas | Subsidiaries

Business And Organization [Line Items]

Variable portion of second annual escalating rate

3.00%

Basis of Presentation and Sum_4

Basis of Presentation and Summary of Significant Accounting Policies - Narrative (Detail)	Dec. 02, 2020USD ($)	May 18, 2020USD ($)	Jan. 14, 2020USD ($)	Dec. 31, 2021USD ($)extensionsegment	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Summary Of Significant Accounting Policies [Line Items]
Assets				$ 10,431,106,000	$ 10,600,306,000
Liabilities				5,071,261,000	5,009,564,000
Amount of Operating Partnership units redeemed				$ 1,181,276,000
Treasury yield term				10 years
Interest rate basis spread				6.00%
Non-normal tenant improvements				$ 48,400,000
Impairment charges				$ 0	0	$ 0
Number of lease extension options \| extension				4
Additional extension period under Master Lease				5 years
Number of reportable segments \| segment				1
MGP Operating Partnership
Summary Of Significant Accounting Policies [Line Items]
Operating unit redemption consideration amount			$ 1,400,000,000
Purchase agreement cash amount discount rate			3.00%
Amount of Operating Partnership units redeemed	$ 700,000,000	$ 700,000,000
MGP Operating Partnership \| Landlord
Summary Of Significant Accounting Policies [Line Items]
Assets				$ 8,900,000,000
Liabilities				599,900,000
Corporate Services Agreement
Summary Of Significant Accounting Policies [Line Items]
Expenses incurred				3,500,000	3,500,000	$ 3,500,000
Tenant
Summary Of Significant Accounting Policies [Line Items]
Initial cap of non-normal tenant improvements in the first year				100,000,000
Annual increase in non-normal tenant improvements				$ 75,000,000
Initial lease term of Master Lease				10 years
Operating Partnership Units to MGP's Class A Shares
Summary Of Significant Accounting Policies [Line Items]
Operating Partnership unit conversion ratio (in units)				1
MGP Operating Partnership
Summary Of Significant Accounting Policies [Line Items]
Assets				$ 10,431,106,000	10,600,306,000
Liabilities				$ 5,071,261,000	$ 5,009,564,000
Operating unit redemption consideration amount			$ 1,400,000,000
Purchase agreement cash amount discount rate			3.00%
Amount of Operating Partnership units redeemed	$ 700,000,000

Basis of Presentation and Sum_5

Basis of Presentation and Summary of Significant Accounting Policies - Estimated Useful Lives of Leased Real Estate and Leasehold Improvements (Detail)	12 Months Ended
	Dec. 31, 2021
Buildings and building improvements \| Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life	20 years
Buildings and building improvements \| Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life	40 years
Land improvements \| Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life	10 years
Land improvements \| Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life	20 years
Furniture, fixtures and equipment \| Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Furniture, fixtures and equipment \| Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life	20 years

Basis of Presentation and Sum_6

Basis of Presentation and Summary of Significant Accounting Policies - Redeemable Noncontrolling Interest (Details) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)shares	Dec. 31, 2020USD ($)shares
Increase (Decrease) in Temporary Equity [Roll Forward]
Beginning balance	$ 0
Reclassification and remeasurement adjustments	1,405,058
Net income	12,079
Redemption of temporary equity	$ (1,392,468)	$ (7,532)	[1]
MGP's issuance of Class A shares and Operating Partnership's issuance of units \| shares	18,418	18,418
MGP BREIT Venture Transaction	$ 16,136
Cash flow hedges	(12,995)
Share-based compensation	292
Deemed contribution - tax sharing agreement	1,047
MGP Dividends and Operating Partnership distributions declared	(46,887)
Other	(680)
Ending balance	$ 0	$ 0

[1]	Excludes amounts attributable to redeemable noncontrolling interest. See Note 2.

Acquisitions and Dispositions -

Acquisitions and Dispositions - Narrative (Detail) - USD ($) $ in Thousands, shares in Millions	Oct. 29, 2021	Apr. 01, 2019	Jan. 29, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Cash payments to acquire assets				$ 400,000	$ 0	$ 0
MGM Springfield
Business Acquisition [Line Items]
Cash payments to acquire assets	$ 400,000
Proceeds from lines of credit	35,000
Carryover basis	$ 695,600
Empire City Casino
Business Acquisition [Line Items]
Consideration transferred			$ 634,400
Assumption of indebtedness			$ 246,000
Operating Partnership units issued (in units)			12.9
Carry value of net assets transferred			$ 625,000
Northfield Park Associates, LLC
Business Acquisition [Line Items]
Consideration transferred		$ 305,200
Carry value of net assets transferred		292,300
Operating Partnership Units \| Northfield Park Associates, LLC
Business Acquisition [Line Items]
Equity interests issued		$ 9,400

Acquisitions and Dispositions_2

Acquisitions and Dispositions - Results of discontinued operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Business Combinations [Abstract]
Total revenues			$ 67,841
Total expenses			(48,735)
Income from discontinued operations before income taxes			19,106
Provision for income taxes			(2,890)
Income from discontinued operations, net of tax	$ 0	$ 0	16,216
Less: Income attributable to noncontrolling interests - discontinued operations			(11,434)
Income from discontinued operations attributable to Class A shareholders			$ 4,782

Real Estate Investments - Carry

Real Estate Investments - Carrying Value of Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Real Estate Properties [Line Items]
Real estate investments, gross	$ 11,664,554	$ 10,857,338
Less: Accumulated depreciation	(2,884,033)	(2,546,601)
Real estate investments, net	8,780,521	8,310,737
Land
Real Estate Properties [Line Items]
Real estate investments, gross	3,522,546	3,431,228
Buildings, building improvements, land improvements and integral equipment
Real Estate Properties [Line Items]
Real estate investments, gross	$ 8,142,008	$ 7,426,110

Real Estate Investments - Narra

Real Estate Investments - Narrative (Details) - USD ($) $ in Thousands	Feb. 14, 2020	Dec. 31, 2021	Dec. 31, 2020
Real Estate Properties [Line Items]
Carrying value of property		$ 8,780,521	$ 8,310,737
Gains (losses) on sales of investment real estate	$ 193,100
MGP Operating Partnership
Real Estate Properties [Line Items]
Carrying value of property		$ 8,780,521	$ 8,310,737
MGP BREIT Venture Transaction \| MGP Operating Partnership
Real Estate Properties [Line Items]
Carrying value of property	2,300,000
Proceeds from sale of equity method investments	2,100,000
Selling costs	$ 10,000

Investment in Unconsolidated _3

Investment in Unconsolidated Affiliate - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]
Income from unconsolidated affiliate	$ 100,824	$ 89,056	$ 0
Distributions from unconsolidated affiliate	94,134	80,990	0
MGP Operating Partnership
Schedule of Equity Method Investments [Line Items]
Income from unconsolidated affiliate	100,824	89,056	0
Distributions from unconsolidated affiliate	94,134	80,990	$ 0
MGP Operating Partnership \| MGP BREIT Venture \| Financial Guarantee
Schedule of Equity Method Investments [Line Items]
Guarantee for losses	$ 3,000,000
Guarantee cap	10.00%
MGP Operating Partnership \| MGP BREIT Venture \| Property Lease Guarantee
Schedule of Equity Method Investments [Line Items]
Guarantee cap	9.90%
MGP BREIT Venture \| MGP Operating Partnership
Schedule of Equity Method Investments [Line Items]
Controlling interest	50.10%
Income from unconsolidated affiliate	$ 100,800	89,100
Distributions from unconsolidated affiliate	$ 94,100	$ 81,000

Investment in Unconsolidated _4

Investment in Unconsolidated Affiliate - MGP BREIT Venture Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]
Real estate investments, net	$ 8,780,521	$ 8,310,737
Debt, net	4,216,877	4,168,959
Net income	359,240	160,371	$ 275,565
MGP BREIT Venture
Schedule of Equity Method Investments [Line Items]
Real estate investments, net	4,439,851	4,523,638
Other assets	193,200	95,342
Debt, net	2,994,782	2,994,269
Other liabilities	8,018	7,811
Net revenues	394,725	346,481
Net income	$ 201,246	$ 177,757

Leases - Narrative (Detail)

Leases - Narrative (Detail) $ in Millions	Apr. 01, 2021USD ($)	Mar. 07, 2019USD ($)shares	Jan. 29, 2019USD ($)shares	Dec. 31, 2021USD ($)extension	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Apr. 01, 2020USD ($)	Feb. 14, 2020USD ($)	Apr. 01, 2019USD ($)	Oct. 05, 2017
Leases [Line Items]
Number of lease extension options \| extension				4
Additional extension period under Master Lease				5 years
Rent payments due under Master Lease		$ 50		$ 872.8
Operating lease cost				$ 23.8	$ 23.8
Master Lease
Leases [Line Items]
Initial lease term of Master Lease				10 years						10 years
Additional extension period under Master Lease				5 years
Annual rent escalator rate			2.00%
Rental revenue				$ 757.9	768.4	$ 856.4
Base Rent
Leases [Line Items]
Operating Lease Rent Payments percentage				91.00%
Annual rent escalator percentage				2.00%
Adjusted net revenue to rent ratio				625.00%
Number of years that the percentage rent is fixed				6 years
Number of years that percentage rent is variable				5 years
Rent payments due under Master Lease							$ 764.9
Rent payment (percent)		90.00%
Annual rent escalator rate		2.00%
Amount of annual lease rent	$ 842.8
Percentage Rent
Leases [Line Items]
Percentage of initial total rent payments due under the Master Lease				9.00%
Lease fixed amount adjustment multiplier				1.40%
MGP BREIT Venture Lease \| Mandalay Bay \| Subsidiaries
Leases [Line Items]
Rent payments due under Master Lease								$ (133)
Tenant Reimbursements
Leases [Line Items]
Rental revenue				$ 24.1	$ 24.2	$ 24.7
Empire City Casino
Leases [Line Items]
Rent payments due under Master Lease			$ 50
Rent payment (percent)			90.00%
Consideration transferred			$ 634.4
Number of shares offered in public offering (in shares) \| shares			12,900,000
Park MGM Lease Transaction
Leases [Line Items]
Consideration transferred		$ 637.5
MGM National Harbor transaction		605.6
Park MGM Lease Transaction \| Tenant Reimbursements
Leases [Line Items]
Rental revenue		$ 94
Northfield OpCo
Leases [Line Items]
Rent payments due under Master Lease									$ 60
Base rent, percent of rent payment									90.00%
MGM Springfield
Leases [Line Items]
Number of lease extension options \| extension				4
MGM Springfield \| Master Lease
Leases [Line Items]
Additional extension period under Master Lease				5 years
MGM Springfield \| Base Rent
Leases [Line Items]
Annual rent escalator percentage				2.00%
First two extensions of master lease \| extension				2
Operating Partnership Units \| Park MGM Lease Transaction
Leases [Line Items]
Number of shares offered in public offering (in shares) \| shares		1,000,000

Leases - Future Noncancelable M

Leases - Future Noncancelable Minimum Rental Payments (Detail) $ in Thousands	Dec. 31, 2021USD ($)
Leases [Abstract]
2022	$ 812,086
2023	791,861
2024	760,161
2025	696,760
2026	232,253
Thereafter	0
Total	$ 3,293,121

Leases - Lease Cost (Details)

Leases - Lease Cost (Details)	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Weighted average remaining lease term (years)	56 years	58 years
Weighted average discount rate (%)	7.00%	7.00%

Leases - Operating Lease Maturi

Leases - Operating Lease Maturities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
2022	$ 24,603
2023	24,478
2024	24,449
2025	24,449
2026	24,449
Thereafter	1,249,430
Total future minimum lease payments	1,371,858
Less: Amount of lease payments representing interest	(1,034,398)
Total	$ 337,460	$ 341,133

Debt - Schedule of Debt (Detail

Debt - Schedule of Debt (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Total	$ 4,250,000	$ 4,210,000
Less: Unamortized discount and debt issuance costs	(33,123)	(41,041)
Long-term debt	4,216,877	4,168,959
Senior secured revolving credit facility \| Revolving Credit Facility
Debt Instrument [Line Items]
Senior secured term loan	$ 50,000	10,000
Interest rate	1.85%
Senior Notes \| 5.625% senior notes, due 2024
Debt Instrument [Line Items]
Senior notes	$ 1,050,000	1,050,000
Interest rate	5.625%
Senior Notes \| 4.625% senior notes, due 2025
Debt Instrument [Line Items]
Senior notes	$ 800,000	800,000
Interest rate	4.625%
Senior Notes \| 4.50% senior notes, due 2026
Debt Instrument [Line Items]
Senior notes	$ 500,000	500,000
Interest rate	4.50%
Senior Notes \| 5.75% senior notes, due 2027
Debt Instrument [Line Items]
Senior notes	$ 750,000	750,000
Interest rate	5.75%
Senior Notes \| 4.50% senior notes, due 2028
Debt Instrument [Line Items]
Senior notes	$ 350,000	350,000
Interest rate	4.50%
Senior Notes \| 3.875% senior notes, due 2029
Debt Instrument [Line Items]
Senior notes	$ 750,000	$ 750,000
Interest rate	3.875%

Debt - Operating Partnership Cr

Debt - Operating Partnership Credit Agreement (Detail) - USD ($)	Dec. 02, 2020	Feb. 14, 2020	Jan. 29, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Nov. 30, 2020	Jun. 30, 2020	Jan. 31, 2019
Debt Instrument [Line Items]
Loss on retirement of debt				$ 0	$ 18,129,000	$ 6,161,000
Fair value of debt				4,600,000,000	4,500,000,000
Amount of Operating Partnership units redeemed				1,181,276,000
MGP Operating Partnership
Debt Instrument [Line Items]
Loss on retirement of debt		$ 18,100,000		$ 0	18,129,000	$ 6,161,000
Amount of Operating Partnership units redeemed	$ 700,000,000
Operating Partnership Senior Notes
Debt Instrument [Line Items]
Debt instrument redemption price percentage				100.00%
Operating Partnership Senior Notes \| $750 million 5.75% senior notes due 2027
Debt Instrument [Line Items]
Interest rate									5.75%
Aggregate principal amount									$ 750,000,000
Secured Debt \| MGP BREIT Venture Transaction
Debt Instrument [Line Items]
Notes reduction		1,300,000,000
Secured Debt \| Senior Credit Facility Term Loan A \| MGP Operating Partnership
Debt Instrument [Line Items]
Repayments of debt		$ 399,000,000
Revolving Credit Facility \| Senior secured revolving credit facility
Debt Instrument [Line Items]
Credit facility amount				$ 1,400,000,000
Senior secured term loan				$ 50,000,000	10,000,000
Interest rate				1.85%
Empire City Casino
Debt Instrument [Line Items]
Assumption of indebtedness			$ 246,000,000
Minimum \| Revolving Credit Facility \| Senior secured revolving credit facility \| LIBOR
Debt Instrument [Line Items]
Variable margin				1.75%
Maximum \| Revolving Credit Facility \| Senior secured revolving credit facility \| LIBOR
Debt Instrument [Line Items]
Variable margin				2.25%
Line of Credit \| Letter of Credit
Debt Instrument [Line Items]
Credit facility amount				$ 75,000,000
Letters of credit outstanding				$ 0
Senior Notes \| $750 million 5.75% senior notes due 2027
Debt Instrument [Line Items]
Interest rate				5.75%
Aggregate principal amount				$ 750,000,000	750,000,000
Senior Notes \| 4.625% senior notes, due 2025
Debt Instrument [Line Items]
Interest rate				4.625%
Aggregate principal amount				$ 800,000,000	$ 800,000,000
Senior Notes \| 4.625% senior notes, due 2025 \| MGP Operating Partnership
Debt Instrument [Line Items]
Interest rate								4.625%
Principal amount								$ 800,000,000
Senior Notes \| 3.875% Senior Notes Due in 2025 \| MGP Operating Partnership
Debt Instrument [Line Items]
Interest rate							3.875%
Principal amount							$ 750,000,000

Debt - Maturities of the Princi

Debt - Maturities of the Principal Amount of Debt (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Debt Disclosure [Abstract]
2022	$ 0
2023	50,000
2024	1,050,000
2025	800,000
2026	500,000
Thereafter	1,850,000
Total	$ 4,250,000	$ 4,210,000

Derivatives and Hedging Activ_3

Derivatives and Hedging Activities - Narrative (Detail) - USD ($) shares in Millions

Feb. 13, 2020

Nov. 22, 2019

May 31, 2021

Nov. 30, 2019

Dec. 31, 2021

Dec. 31, 2020

Dec. 31, 2019

Jun. 30, 2021

Nov. 30, 2020

Sep. 30, 2020

Jun. 30, 2020

Sep. 30, 2019

Jun. 30, 2019

Derivative [Line Items]

Gain (loss) on unhedged interest rate swaps

$ 39,071,000

$ 4,664,000

$ (3,880,000)

MGP Operating Partnership

Derivative [Line Items]

Gain (loss) on unhedged interest rate swaps

39,071,000

4,664,000

(3,880,000)

4.625% senior notes, due 2025 | Senior Notes | MGP Operating Partnership

Derivative [Line Items]

Principal amount

$ 800,000,000

3.875% Senior Notes Due in 2025 | Senior Notes | MGP Operating Partnership

Derivative [Line Items]

Principal amount

$ 750,000,000

Interest Rate Swaps

Derivative [Line Items]

Notional amount of de-designated interest rate swaps

$ 600,000,000

$ 700,000,000

$ 600,000,000

Loss on cash flow hedges

$ 4,900,000

Gain (loss) on unhedged interest rate swaps

39,100,000

2,100,000

$ 1,000,000

Interest Rate Swaps | MGP Operating Partnership

Derivative [Line Items]

Notional Amount

$ 1,200,000,000

Gain (loss) on unhedged interest rate swaps, net

$ 100,000

Interest Rate Swap Effective Oct 1, 2019

Derivative [Line Items]

Notional Amount

$ 400,000,000

Interest Rate Swap Effective June 30, 2022 | MGP Operating Partnership

Derivative [Line Items]

Notional Amount

$ 900,000,000

Average fixed interest rate

1.94%

Not Designated as Hedging Instrument

Derivative [Line Items]

Notional Amount

700,000,000

1,900,000,000

Not Designated as Hedging Instrument | Interest Rate Swap Effective Sep 6, 2019

Derivative [Line Items]

Notional Amount

$ 300,000,000

Average fixed interest rate

1.158%

Not Designated as Hedging Instrument | Interest Rate Swap Effective Oct 1, 2019

Derivative [Line Items]

Notional Amount

$ 400,000,000

Average fixed interest rate

2.252%

Designated as Hedging Instrument

Derivative [Line Items]

Notional Amount

$ 900,000,000

Designated as Hedging Instrument | Interest Rate Swap Effective Nov 30, 2021

Derivative [Line Items]

Notional Amount

$ 900,000,000

Average fixed interest rate

1.801%

Designated as Hedging Instrument | Interest Rate Swap Effective June 30, 2022

Derivative [Line Items]

Notional Amount

$ 900,000,000

Average fixed interest rate

1.94%

Secured Debt

Derivative [Line Items]

Debt prepayments

$ 541,000,000

Class A Shares | Forward Purchase Agreement

Derivative [Line Items]

Number of shares offered in public offering (in shares)

Derivatives and Hedging Activ_4

Derivatives and Hedging Activities - Schedule of Interest Rate Derivatives (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Sep. 30, 2019	Jun. 30, 2019
Derivative [Line Items]
Fair Value Liability	$ (52,587)	$ (118,924)
Designated as Hedging Instrument
Derivative [Line Items]
Notional Amount	900,000	900,000
Fair Value Liability	(25,299)	(41,131)
Not Designated as Hedging Instrument
Derivative [Line Items]
Notional Amount	700,000	1,900,000
Fair Value Liability	(27,288)	(77,793)
Interest Rate Swap Effective Nov 30, 2021 \| Designated as Hedging Instrument
Derivative [Line Items]
Notional Amount		$ 900,000
Weighted Average Fixed Rate		1.801%			1.801%
Fair Value Liability		$ (41,131)
Interest Rate Swap Effective May 3, 2017 \| Not Designated as Hedging Instrument
Derivative [Line Items]
Notional Amount		$ 1,200,000
Weighted Average Fixed Rate		1.844%
Fair Value Liability		$ (18,889)
Interest Rate Swap Effective Sep 6, 2019 \| Not Designated as Hedging Instrument
Derivative [Line Items]
Notional Amount	$ 300,000	$ 300,000		$ 300,000
Weighted Average Fixed Rate	1.158%	1.158%		1.158%
Fair Value Liability	$ (969)	$ (10,451)
Interest Rate Swap Effective Oct 1, 2019
Derivative [Line Items]
Notional Amount			$ 400,000
Interest Rate Swap Effective Oct 1, 2019 \| Not Designated as Hedging Instrument
Derivative [Line Items]
Notional Amount	$ 400,000	$ 400,000
Weighted Average Fixed Rate	2.252%	2.252%
Fair Value Liability	$ (26,319)	$ (48,453)
Interest Rate Swap Effective June 30, 2022 \| Designated as Hedging Instrument
Derivative [Line Items]
Notional Amount	$ 900,000
Weighted Average Fixed Rate	1.94%
Fair Value Liability	$ (25,299)

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Detail) - USD ($)	12 Months Ended
Income Taxes - Narrative (Detail) - USD ($)	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Examination [Line Items]
Minimum percentage of taxable income distributed to shareholders	90.00%
Expected distribution percentage of REIT taxable income in the current taxable year	100.00%
Income Tax Expense (Benefit)	$ 9,328,000	$ 9,734,000	$ 7,598,000
Amounts due to MGM under tax sharing agreement	0	0
Uncertain tax positions	0	0
Interest and penalties recorded	$ 0	$ 0	0
Subsidiaries
Income Tax Examination [Line Items]
Income Tax Expense (Benefit)			1,800,000
Subsidiaries \| Discontinued Operations
Income Tax Examination [Line Items]
Income Tax Expense (Benefit)			2,900,000
Subsidiaries \| Continuing Operations
Income Tax Examination [Line Items]
Income Tax Expense (Benefit)			$ 1,100,000

Income Taxes - Provision for In

Income Taxes - Provision for Income Taxes Attributable to Income (Loss) Before Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Federal:
Deferred	$ 0	$ 0	$ (1,058)
Provision for federal income taxes on continuing operations	0	0	(1,058)
State:
Current	9,344	6,345	7,309
Deferred	(16)	3,389	1,347
Provision for state income taxes on continuing operations	$ 9,328	$ 9,734	$ 8,656

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Federal Income Tax Statutory Rate and Effective Tax Rate (Detail)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Federal income tax statutory rate	21.00%	21.00%	21.00%
Income not subject to federal income tax	(21.00%)	(21.00%)	(21.40%)
State taxes	2.50%	5.70%	3.20%
Effective tax rate on income from continuing operations	2.50%	5.70%	2.80%

Income Taxes - Major Tax-Effect

Income Taxes - Major Tax-Effected Components of Net Deferred Tax Liability (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred tax liability - federal and state
Real estate investments, net	$ (41,217)	$ (33,298)
Total deferred tax liability	(41,217)	(33,298)
Net deferred tax liability	$ (41,217)	$ (33,298)

Shareholders' Equity and Part_3

Shareholders' Equity and Partners' Capital - Narrative (Detail) - USD ($) $ in Thousands

Mar. 15, 2021

Dec. 02, 2020

May 18, 2020

Feb. 14, 2020

Feb. 13, 2020

Feb. 12, 2020

Nov. 22, 2019

Apr. 01, 2019

Mar. 07, 2019

Jan. 31, 2019

Jan. 29, 2019

Mar. 31, 2021

Feb. 14, 2020

Dec. 31, 2021

Dec. 31, 2019

May 12, 2021

Mar. 14, 2021

Feb. 15, 2020

Nov. 21, 2019

Apr. 30, 2019

Jan. 28, 2019

Stockholders Equity and Partners Capital [Line Items]

Amount of Operating Partnership units redeemed

$ 1,181,276

MGP Operating Partnership

Stockholders Equity and Partners Capital [Line Items]

Ownership percentage

57.90%

47.00%

43.30%

58.40%

47.00%

39.40%

Amount of Operating Partnership units redeemed

$ 700,000

Stock redeemed during period (in shares)

23,500,000

30,300,000

Stock redeemed using proceeds from share issuances (in shares)

21,900,000

Proceeds from issuance of equity

$ 1,200,000

MGP BREIT Venture Transaction

Stockholders Equity and Partners Capital [Line Items]

Number of shares offered in public offering (in shares)

2,600,000

Ownership percentage

39.70%

39.40%

Class A Shares

Stockholders Equity and Partners Capital [Line Items]

Net proceeds from public offering of stock

$ 548,400

Public Stock Offering | Class A Shares

Stockholders Equity and Partners Capital [Line Items]

Number of shares offered in public offering (in shares)

21,900,000

30,000,000

19,600,000

Ownership percentage

38.80%

Net proceeds from public offering of stock

$ 676,000

Over-Allotment Option | Class A Shares

Stockholders Equity and Partners Capital [Line Items]

Number of shares offered in public offering (in shares)

18,000,000

2,600,000

Ownership percentage

36.30%

Net proceeds from public offering of stock

$ 540,600

ATM Offering | Class A Shares

Stockholders Equity and Partners Capital [Line Items]

Number of shares offered in public offering (in shares)

600,000

3,300,000

5,300,000

Net proceeds from public offering of stock

$ 18,700

$ 116,800

$ 161,000

Aggregate sales price

$ 300,000

Authorized amount remaining

$ 117,700

Forward Purchase Agreement | Class A Shares

Stockholders Equity and Partners Capital [Line Items]

Number of shares offered in public offering (in shares)

12,000,000

Net proceeds from public offering of stock

$ 355,900

MGP BREIT Venture Transaction | Class A Shares

Stockholders Equity and Partners Capital [Line Items]

Number of shares offered in public offering (in shares)

4,900,000

Net proceeds from public offering of stock

$ 150,000

Empire City Casino

Stockholders Equity and Partners Capital [Line Items]

Number of shares offered in public offering (in shares)

12,900,000

Ownership percentage

25.40%

26.70%

Northfield

Stockholders Equity and Partners Capital [Line Items]

Ownership percentage

31.20%

30.30%

Park MGM Lease Transaction

Stockholders Equity and Partners Capital [Line Items]

Ownership percentage

30.20%

Operating Partnership Units | MGP Operating Partnership

Stockholders Equity and Partners Capital [Line Items]

Stock redeemed during period (in shares)

37,100,000

Stock redeemed during period using cash (in shares)

15,300,000

Operating Partnership Units | ATM Offering | MGP Operating Partnership

Stockholders Equity and Partners Capital [Line Items]

Number of shares offered in public offering (in shares)

3,300,000

Operating Partnership Units | ATM Offering | Class A Shares

Stockholders Equity and Partners Capital [Line Items]

Number of shares offered in public offering (in shares)

5,300,000

Ownership percentage

32.40%

Operating Partnership Units | Northfield

Stockholders Equity and Partners Capital [Line Items]

Equity interests issued

$ 9,400

Operating Partnership Units | Park MGM Lease Transaction

Stockholders Equity and Partners Capital [Line Items]

Number of shares offered in public offering (in shares)

1,000,000

MGP Operating Partnership

Stockholders Equity and Partners Capital [Line Items]

Amount of Operating Partnership units redeemed

$ 700,000

MGP Operating Partnership | ATM Offering | Class A Shares

Stockholders Equity and Partners Capital [Line Items]

Number of shares offered in public offering (in shares)

600,000

Shareholders' Equity and Part_4

Shareholders' Equity and Partners' Capital - Change in Ownership Percentage (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020		Dec. 31, 2020	Dec. 31, 2019
Class of Stock [Line Items]
Net income attributable to MGM Growth Properties	$ 205,503	$ 76,129			$ 90,260
Transfers from/(to) noncontrolling interest:
Redemption of temporary equity		(7,532)	[1]	$ (1,392,468)
Other	(840)	1,275			1,183
Net transfers from noncontrolling interest	428,034	337,355			1,049,567
Change from net income attributable to MGM Growth Properties and transfers to noncontrolling interest	633,537	413,484			1,139,827
Operating Partnership Units
Transfers from/(to) noncontrolling interest:
Redemption of Operating Partnership units	(227,487)	0			0
Total Class A Shareholders' Equity
Transfers from/(to) noncontrolling interest:
Redemption of temporary equity	0	(114,924)	[1]		0
Class A Shares
Transfers from/(to) noncontrolling interest:
Share issuances	656,361	442,717			1,049,582
Empire City Casino
Transfers from/(to) noncontrolling interest:
Transactions	0	0			23,745
Park MGM Lease Transaction
Transfers from/(to) noncontrolling interest:
Transactions	0	0			2,496
MGP BREIT Venture Transaction
Transfers from/(to) noncontrolling interest:
Transactions	0	8,287			0
Northfield OpCo
Transfers from/(to) noncontrolling interest:
Northfield OpCo Transaction	$ 0	$ 0			$ (27,439)

[1]	Excludes amounts attributable to redeemable noncontrolling interest. See Note 2.

Shareholders' Equity and Part_5

Shareholders' Equity and Partners' Capital - Changes in Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2020		Dec. 31, 2019
AOCI, Net of Tax [Roll Forward]
Balance		$ 5,590,742		$ 6,898,012		$ 5,845,506
Other comprehensive income (loss) before reclassifications		16,378		(104,999)		(34,476)
Other comprehensive income (loss)		38,578		(89,624)		(35,198)
Less: Other comprehensive loss attributable to noncontrolling interest		(17,513)		54,787		25,666
Issuances of shares/units		(4,172)				(1,512)
Redemption of Operating Partnership units		(1,181,276)
Redemption of temporary equity			$ (1,392,468)	(7,532)	[1]
Other		7,382		(166)	[1]	2,909
Changes in accumulated other comprehensive loss:		27,521		(98,939)		(36,919)
Balance		5,359,845	5,590,742	5,590,742		6,898,012
Class A Shares
AOCI, Net of Tax [Roll Forward]
Issuances of shares/units				(646)
Interest Expense
AOCI, Net of Tax [Roll Forward]
Amounts reclassified from accumulated other comprehensive loss to interest expense		22,200		17,922		(5,599)
Unhedged Interest Rate Swaps
AOCI, Net of Tax [Roll Forward]
Amounts reclassified from accumulated other comprehensive loss to interest expense				(2,547)		4,877
Accumulated Other Comprehensive Income (Loss)
AOCI, Net of Tax [Roll Forward]
Balance		(51,197)		(7,045)		4,208
Other comprehensive income (loss)						(35,198)
Redemption of Operating Partnership units		(6,860)
Redemption of temporary equity	[1]			(8,773)
Other		(25)		45	[1]
Balance		(41,189)	(51,197)	(51,197)		(7,045)
Cash Flow Hedges
AOCI, Net of Tax [Roll Forward]
Balance		(40,063)		(5,226)
Other comprehensive income (loss)						(35,198)
Balance		(18,998)	(40,063)	(40,063)		(5,226)
Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest
AOCI, Net of Tax [Roll Forward]
Balance						4,306
Other comprehensive income (loss) before reclassifications		16,378		(104,999)		(34,476)
Other comprehensive income (loss)		38,578		(89,624)
Issuances of shares/units		0				0
Redemption of Operating Partnership units		0
Redemption of temporary equity				0
Other		0		0
Changes in accumulated other comprehensive loss:		38,578		(89,624)		(35,198)
Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest \| Class A Shares
AOCI, Net of Tax [Roll Forward]
Issuances of shares/units				0
Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest \| Interest Expense
AOCI, Net of Tax [Roll Forward]
Amounts reclassified from accumulated other comprehensive loss to interest expense		22,200		17,922		(5,599)
Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest \| Unhedged Interest Rate Swaps
AOCI, Net of Tax [Roll Forward]
Amounts reclassified from accumulated other comprehensive loss to interest expense				(2,547)
Cash Flow Hedges Noncontrolling Interest
AOCI, Net of Tax [Roll Forward]
Less: Other comprehensive loss attributable to noncontrolling interest		(17,513)		54,787		25,666
Cash Flow Hedges Noncontrolling Interest \| Unhedged Interest Rate Swaps
AOCI, Net of Tax [Roll Forward]
Amounts reclassified from accumulated other comprehensive loss to interest expense						4,877
Other
AOCI, Net of Tax [Roll Forward]
Balance		(11,134)		(1,819)		(98)
Balance		(22,191)	$ (11,134)	(11,134)		(1,819)
Other Including Portion Attributable to Noncontrolling Interest
AOCI, Net of Tax [Roll Forward]
Other comprehensive income (loss) before reclassifications		0		0		0
Other comprehensive income (loss)		0		0		0
Issuances of shares/units		(4,172)				(1,512)
Redemption of Operating Partnership units		(6,860)
Redemption of temporary equity				(8,773)
Other		(25)		45
Changes in accumulated other comprehensive loss:		(11,057)		(9,315)		(1,721)
Other Including Portion Attributable to Noncontrolling Interest \| Class A Shares
AOCI, Net of Tax [Roll Forward]
Issuances of shares/units				(646)
Other Including Portion Attributable to Noncontrolling Interest \| Interest Expense
AOCI, Net of Tax [Roll Forward]
Amounts reclassified from accumulated other comprehensive loss to interest expense		0		0		0
Other Including Portion Attributable to Noncontrolling Interest \| Unhedged Interest Rate Swaps
AOCI, Net of Tax [Roll Forward]
Amounts reclassified from accumulated other comprehensive loss to interest expense				0		0
Other Portion Attributable to Noncontrolling Interest
AOCI, Net of Tax [Roll Forward]
Less: Other comprehensive loss attributable to noncontrolling interest		$ 0		0		0
Northfield OpCo
AOCI, Net of Tax [Roll Forward]
Northfield OpCo Transaction						2
Northfield OpCo \| Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest
AOCI, Net of Tax [Roll Forward]
Northfield OpCo Transaction						0
Northfield OpCo \| Other Including Portion Attributable to Noncontrolling Interest
AOCI, Net of Tax [Roll Forward]
Northfield OpCo Transaction						2
Empire City Casino
AOCI, Net of Tax [Roll Forward]
Acquisition Transaction						(195)
Empire City Casino \| Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest
AOCI, Net of Tax [Roll Forward]
Acquisition Transaction						0
Empire City Casino \| Other Including Portion Attributable to Noncontrolling Interest
AOCI, Net of Tax [Roll Forward]
Acquisition Transaction						(195)
Park MGM Lease Transaction
AOCI, Net of Tax [Roll Forward]
Acquisition Transaction						(16)
Park MGM Lease Transaction \| Cash Flow Hedges Noncontrolling Interest
AOCI, Net of Tax [Roll Forward]
Acquisition Transaction						0
Park MGM Lease Transaction \| Other Including Portion Attributable to Noncontrolling Interest
AOCI, Net of Tax [Roll Forward]
Acquisition Transaction						$ (16)
MGP BREIT Venture Transaction
AOCI, Net of Tax [Roll Forward]
Acquisition Transaction				59
MGP BREIT Venture Transaction \| Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest
AOCI, Net of Tax [Roll Forward]
Acquisition Transaction				0
MGP BREIT Venture Transaction \| Other Including Portion Attributable to Noncontrolling Interest
AOCI, Net of Tax [Roll Forward]
Acquisition Transaction				$ 59

[1]	Excludes amounts attributable to redeemable noncontrolling interest. See Note 2.

Shareholders' Equity and Part_6

Shareholders' Equity and Partners' Capital - Summary of Distributions (Details) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Class of Stock [Line Items]
Total (in dollars per share)	$ 2.0550	$ 1.9375	$ 1.8725
Class A Shares
Class of Stock [Line Items]
Non-qualified dividends (in dollars per share)	1.6363	1.4649	1.6134
Return of capital (in dollars per share)	0.3812	0.4551	0.2366
Total (in dollars per share)	$ 2.0175	$ 1.9200	$ 1.8500
Non-qualified dividends	81.11%	76.30%	87.21%
Return of capital	18.89%	23.70%	12.79%
Total	100.00%	100.00%	100.00%

Earnings Per Class A Share (Det

Earnings Per Class A Share (Detail) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Numerator:
Income from continuing operations, net of tax	$ 359,240	$ 160,371	$ 259,349
Less: Income from continuing operations attributable to noncontrolling interest	(153,737)	(84,242)	(173,871)
Income from continuing operations, net of tax, attributable to unitholders - basic and diluted	205,503	76,129	85,478
Income from discontinued operations, net of tax - basic and diluted	0	0	16,216
Less: Income from discontinued operations attributable to noncontrolling interest	0	0	(11,434)
Income from discontinued operations attributable to Class A shares - basic and diluted	0	0	4,782
Net income attributable to Class A shareholders	$ 205,503	$ 76,129	$ 90,260
Denominator:
Weighted average Class A shares outstanding - basic (in shares)	151,000	129,491	93,047
Effect of dilutive shares for diluted net income per Class A share (in shares)	194	162	252
Weighted average Class A outstanding - diluted (in shares)	151,194	129,653	93,299
Stock Compensation Plan \| Maximum
Denominator:
Potentially dilutive shares (in shares)	100	100	100

Earnings Per Operating Partne_3

Earnings Per Operating Partnership Unit (Detail) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Numerator:
Income from continuing operations, net of tax, attributable to unitholders - basic and diluted	$ 205,503	$ 76,129	$ 85,478
Income from discontinued operations, net of tax - basic and diluted	0	0	16,216
Net income	$ 359,240	$ 160,371	$ 275,565
Denominator:
Effect of dilutive shares for diluted net income per Operating Partnership unit (in units)	194	162	252
MGP Operating Partnership
Numerator:
Income from continuing operations, net of tax, attributable to unitholders - basic and diluted	$ 359,240	$ 160,371	$ 259,349
Income from discontinued operations, net of tax - basic and diluted	0	0	16,216
Net income	$ 359,240	$ 160,371	$ 275,565
Denominator:
Weighted average Operating Partnership units outstanding - basic (in units)	269,674	310,688	293,885
Effect of dilutive shares for diluted net income per Operating Partnership unit (in units)	194	162	252
Weighted average Operating Partnership units outstanding - diluted (in units)	269,868	310,850	294,137
Maximum \| Stock Compensation Plan
Denominator:
Potentially dilutive shares (in shares)	100	100	100
Maximum \| MGP Operating Partnership \| Stock Compensation Plan
Denominator:
Potentially dilutive shares (in shares)	100	100	100

Schedule III - Real Estate an_2

Schedule III - Real Estate and Accumulated Depreciation - Summary of Real Estate Properties (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Acquisition Costs
Land	$ 3,522,546
Building, Improvements and Other	8,151,610
Costs Capitalized Subsequent to Acquisition
Land	0
Building, Improvements and Other	147,543
Gross Amount at Which Carried at Close of Period
Land	3,522,546
Building, Improvements and Other	8,142,008
Total	11,664,554	$ 10,857,338	$ 13,924,496	$ 13,318,334
Accumulated Depreciation	(2,884,033)	$ (2,546,601)	$ (3,096,524)	$ (2,812,205)
Aggregate cost of land, buildings, and improvements for federal income tax purposes	8,900,000
Investment Properties
Acquisition Costs
Land	3,522,546
Building, Improvements and Other	8,151,122
Costs Capitalized Subsequent to Acquisition
Land	0
Building, Improvements and Other	147,351
Gross Amount at Which Carried at Close of Period
Land	3,522,546
Building, Improvements and Other	8,141,327
Total	11,663,873
Accumulated Depreciation	(2,883,662)
New York-New York \| Investment Properties
Acquisition Costs
Land	183,010
Building, Improvements and Other	585,354
Costs Capitalized Subsequent to Acquisition
Land	0
Building, Improvements and Other	0
Gross Amount at Which Carried at Close of Period
Land	183,010
Building, Improvements and Other	584,230
Total	767,240
Accumulated Depreciation	(362,352)
The Mirage \| Investment Properties
Acquisition Costs
Land	1,017,562
Building, Improvements and Other	760,222
Costs Capitalized Subsequent to Acquisition
Land	0
Building, Improvements and Other	0
Gross Amount at Which Carried at Close of Period
Land	1,017,562
Building, Improvements and Other	746,186
Total	1,763,748
Accumulated Depreciation	(560,213)
Luxor \| Investment Properties
Acquisition Costs
Land	440,685
Building, Improvements and Other	710,796
Costs Capitalized Subsequent to Acquisition
Land	0
Building, Improvements and Other	0
Gross Amount at Which Carried at Close of Period
Land	440,685
Building, Improvements and Other	699,688
Total	1,140,373
Accumulated Depreciation	(417,117)
Excalibur \| Investment Properties
Acquisition Costs
Land	814,805
Building, Improvements and Other	342,685
Costs Capitalized Subsequent to Acquisition
Land	0
Building, Improvements and Other	43,945
Gross Amount at Which Carried at Close of Period
Land	814,805
Building, Improvements and Other	383,474
Total	1,198,279
Accumulated Depreciation	(182,047)
Park MGM \| Investment Properties
Acquisition Costs
Land	291,035
Building, Improvements and Other	376,625
Costs Capitalized Subsequent to Acquisition
Land	0
Building, Improvements and Other	103,406
Gross Amount at Which Carried at Close of Period
Land	291,035
Building, Improvements and Other	362,743
Total	653,778
Accumulated Depreciation	(147,077)
Beau Rivage \| Investment Properties
Acquisition Costs
Land	104,945
Building, Improvements and Other	561,457
Costs Capitalized Subsequent to Acquisition
Land	0
Building, Improvements and Other	0
Gross Amount at Which Carried at Close of Period
Land	104,945
Building, Improvements and Other	550,728
Total	655,673
Accumulated Depreciation	(298,870)
MGM Grand Detroit \| Investment Properties
Acquisition Costs
Land	52,509
Building, Improvements and Other	597,324
Costs Capitalized Subsequent to Acquisition
Land	0
Building, Improvements and Other	0
Gross Amount at Which Carried at Close of Period
Land	52,509
Building, Improvements and Other	596,675
Total	649,184
Accumulated Depreciation	(221,588)
Gold Strike Tunica \| Investment Properties
Acquisition Costs
Land	3,609
Building, Improvements and Other	179,146
Costs Capitalized Subsequent to Acquisition
Land	0
Building, Improvements and Other	0
Gross Amount at Which Carried at Close of Period
Land	3,609
Building, Improvements and Other	177,766
Total	181,375
Accumulated Depreciation	(101,710)
Borgata \| Investment Properties
Acquisition Costs
Land	35,568
Building, Improvements and Other	1,264,432
Costs Capitalized Subsequent to Acquisition
Land	0
Building, Improvements and Other	0
Gross Amount at Which Carried at Close of Period
Land	35,568
Building, Improvements and Other	1,249,272
Total	1,284,840
Accumulated Depreciation	(187,546)
MGM National Harbor \| Investment Properties
Acquisition Costs
Land	0
Building, Improvements and Other	1,183,909
Costs Capitalized Subsequent to Acquisition
Land	0
Building, Improvements and Other	0
Gross Amount at Which Carried at Close of Period
Land	0
Building, Improvements and Other	1,204,911
Total	1,204,911
Accumulated Depreciation	(203,663)
MGM Northfield Park \| Investment Properties
Acquisition Costs
Land	392,500
Building, Improvements and Other	376,842
Costs Capitalized Subsequent to Acquisition
Land	0
Building, Improvements and Other	0
Gross Amount at Which Carried at Close of Period
Land	392,500
Building, Improvements and Other	373,324
Total	765,824
Accumulated Depreciation	(47,078)
Empire City \| Investment Properties
Acquisition Costs
Land	95,000
Building, Improvements and Other	530,000
Costs Capitalized Subsequent to Acquisition
Land	0
Building, Improvements and Other	0
Gross Amount at Which Carried at Close of Period
Land	95,000
Building, Improvements and Other	530,000
Total	625,000
Accumulated Depreciation	(72,051)
MGP Corporate Office \| Corporate Property
Acquisition Costs
Land	0
Building, Improvements and Other	488
Costs Capitalized Subsequent to Acquisition
Land	0
Building, Improvements and Other	192
Gross Amount at Which Carried at Close of Period
Land	0
Building, Improvements and Other	681
Total	681
Accumulated Depreciation	(371)
MGM Springfield \| Investment Properties
Acquisition Costs
Land	91,318
Building, Improvements and Other	682,330
Costs Capitalized Subsequent to Acquisition
Land	0
Building, Improvements and Other	0
Gross Amount at Which Carried at Close of Period
Land	91,318
Building, Improvements and Other	682,330
Total	773,648
Accumulated Depreciation	$ (82,350)

Schedule III - Real Estate an_3

Schedule III - Real Estate and Accumulated Depreciation - Summary of Depreciable Lives (Detail)	12 Months Ended
	Dec. 31, 2021
Buildings and building improvements \| Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Depreciable lives	20 years
Buildings and building improvements \| Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Depreciable lives	40 years
Land improvements \| Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Depreciable lives	10 years
Land improvements \| Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Depreciable lives	20 years
Fixtures and integral equipment \| Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Depreciable lives	3 years
Fixtures and integral equipment \| Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Depreciable lives	20 years

Schedule III - Real Estate an_4

Schedule III - Real Estate and Accumulated Depreciation - Reconciliation of Real Estate (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at beginning of year	$ 10,857,338	$ 13,924,496	$ 13,318,334
Additions	773,648	0	625,000
Dispositions and write-offs	(4,666)	(3,067,158)	(27,377)
Other	38,234	0	8,539
Balance at end of year	11,664,554	10,857,338	13,924,496
MGP BREIT Venture Transaction \| Mandalay Bay
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Dispositions and write-offs		$ (3,100,000)
MGM Springfield
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Additions	$ 773,600
Empire City Casino
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Additions			$ 625,000

Schedule III - Real Estate an_5

Schedule III - Real Estate and Accumulated Depreciation - Reconciliation of Accumulated Depreciation (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]
Balance at beginning of year	$ (2,546,601)	$ (3,096,524)	$ (2,812,205)
Depreciation expense	(235,485)	(236,853)	(294,705)
Dispositions and write-offs	2,956	786,776	16,533
Additions and other	(104,903)	0	(6,147)
Balance at end of year	(2,884,033)	(2,546,601)	$ (3,096,524)
MGM Springfield
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]
Additions and other	$ (78,000)
MGP BREIT Venture Transaction \| Mandalay Bay
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]
Dispositions and write-offs		$ 785,300