Landstar System (LSTR) 10-Q28 Oct 222022 Q3 Quarterly reportFinancial data

Company Profile

Cover Page

Cover Page - shares	9 Months Ended
Cover Page - shares	Sep. 24, 2022	Oct. 17, 2022
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q3
Document Quarterly Report	true
Entity Central Index Key	0000853816
Document Transition Report	false
Current Fiscal Year End Date	--12-31
Document Period End Date	Sep. 24, 2022
Entity Registrant Name	LANDSTAR SYSTEM, INC.
Entity Filer Category	Large Accelerated Filer
Trading Symbol	LSTR
Title of 12(b) Security	Common Stock
Security Exchange Name	NASDAQ
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		35,925,265
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity File Number	0-21238
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	06-1313069
Entity Address, Address Line One	13410 Sutton Park Drive South
Entity Address, City or Town	Jacksonville
Entity Address, Postal Zip Code	32224
City Area Code	904
Local Phone Number	398-9400
Entity Address, State or Province	FL

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 24, 2022	Dec. 25, 2021
Current Assets
Cash and cash equivalents	$ 177,796	$ 215,522
Short-term investments	50,637	35,778
Trade accounts receivable, less allowance of $10,464 and $7,074	1,133,681	1,154,314
Other receivables, including advances to independent contractors, less allowance of $9,877 and $8,125	87,241	101,124
Other current assets	35,493	16,162
Total current assets	1,484,848	1,522,900
Operating property, less accumulated depreciation and amortization of $383,458 and $344,099	321,585	317,386
Goodwill	41,004	40,768
Other assets	141,103	164,411
Total assets	1,988,540	2,045,465
Current Liabilities
Cash overdraft	97,686	116,478
Accounts payable	644,054	604,130
Current maturities of long-term debt	37,375	36,561
Insurance claims	58,131	46,896
Dividends payable		75,387
Other current liabilities	104,272	130,531
Total current liabilities	941,518	1,009,983
Long-term debt, excluding current maturities	72,095	75,243
Insurance claims	55,765	49,509
Deferred income taxes and other noncurrent liabilities	45,989	48,720
Shareholders' Equity
Common stock, $0.01 par value, authorized 160,000,000 shares, issued 68,380,565 and 68,232,975 shares	684	682
Additional paid-in capital	255,486	255,148
Retained earnings	2,625,290	2,317,184
Cost of 32,455,300 and 30,539,235 shares of common stock in treasury	(1,992,886)	(1,705,601)
Accumulated other comprehensive loss	(15,401)	(5,403)
Total shareholders' equity	873,173	862,010
Total liabilities and shareholders' equity	$ 1,988,540	$ 2,045,465

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 24, 2022	Dec. 25, 2021
Allowance on trade accounts receivable	$ 10,464	$ 7,074
Allowance on other receivables	9,877	8,125
Accumulated depreciation and amortization on operating property	$ 383,458	$ 344,099
Common stock, par value	$ 0.01	$ 0.01
Common stock, authorized shares	160,000,000	160,000,000
Common stock, issued shares	68,380,565	68,232,975
Treasury stock, shares	32,455,300	30,539,235

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
Consolidated Statements of Income - USD ($) $ in Thousands	Sep. 24, 2022	Sep. 25, 2021	Sep. 24, 2022	Sep. 25, 2021
Revenue	$ 1,816,132	$ 1,734,299	$ 5,761,795	$ 4,592,551
Investment income	716	706	2,023	2,138
Costs and expenses:
Purchased transportation	1,416,323	1,356,671	4,512,341	3,583,197
Commissions to agents	154,125	135,295	465,759	356,997
Other operating costs, net of gains on asset sales/dispositions	13,356	10,572	34,878	27,117
Insurance and claims	31,445	29,569	96,265	75,198
Selling, general and administrative	53,519	59,198	165,199	158,720
Depreciation and amortization	14,582	12,288	42,627	36,532
Total costs and expenses	1,683,350	1,603,593	5,317,069	4,237,761
Operating income	133,498	131,412	446,749	356,928
Interest and debt expense	1,047	965	3,275	2,974
Income before income taxes	132,451	130,447	443,474	353,954
Income taxes	32,233	31,772	105,862	85,745
Net income	$ 100,218	$ 98,675	$ 337,612	$ 268,209
Diluted earnings per share	$ 2.76	$ 2.58	$ 9.15	$ 7
Average diluted shares outstanding	36,334,000	38,218,000	36,886,000	38,342,000
Dividends per common share	$ 0.3	$ 0.25	$ 0.8	$ 0.67

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 24, 2022	Sep. 25, 2021	Sep. 24, 2022	Sep. 25, 2021
Net income	$ 100,218	$ 98,675	$ 337,612	$ 268,209
Other comprehensive (loss) income:
Unrealized holding losses on available-for-sale investments, net of tax benefit of $2,461, $347, $436 and $104	(1,596)	(377)	(8,987)	(1,260)
Foreign currency translation (losses) gains	(1,484)	(710)	(1,011)	320
Other comprehensive loss	(3,080)	(1,087)	(9,998)	(940)
Comprehensive income	$ 97,138	$ 97,588	$ 327,614	$ 267,269

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 24, 2022	Sep. 25, 2021	Sep. 24, 2022	Sep. 25, 2021
Unrealized holding losses on available-for-sale investments, net of tax benefit	$ 436	$ 104	$ 2,461	$ 347

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 24, 2022	Sep. 25, 2021
OPERATING ACTIVITIES
Net income	$ 337,612	$ 268,209
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	42,627	36,532
Non-cash interest charges	290	336
Provisions for losses on trade and other accounts receivable	8,346	3,884
Gains on sales/disposals of operating property	(1,290)	(1,259)
Deferred income taxes, net	(2,597)	4,948
Stock-based compensation	9,409	18,717
Changes in operating assets and liabilities:
Decrease (increase) in trade and other accounts receivable	26,170	(224,503)
Increase in other assets	(17,669)	(3,822)
Increase in accounts payable	39,924	167,880
(Decrease) increase in other liabilities	(23,932)	22,837
Increase (decrease) in insurance claims	17,491	(76,769)
NET CASH PROVIDED BY OPERATING ACTIVITIES	436,381	216,990
INVESTING ACTIVITIES
Sales and maturities of investments	27,568	25,521
Purchases of investments	(30,490)	(77,649)
Purchases of operating property	(21,096)	(18,561)
Proceeds from sales of operating property	2,669	2,047
Purchase of non-marketable securities	(4,999)
NET CASH USED BY INVESTING ACTIVITIES	(26,348)	(68,642)
FINANCING ACTIVITIES
(Decrease) increase in cash overdraft	(18,792)	14,210
Dividends paid	(104,893)	(102,463)
Payment for debt issue costs	(1,080)
Proceeds from exercises of stock options	56	134
Taxes paid in lieu of shares issued related to stock-based compensation plans	(10,427)	(2,342)
Purchases of common stock	(285,983)	(50,230)
Principal payments on finance lease obligations	(29,075)	(26,513)
Payment of deferred consideration		(168)
NET CASH USED BY FINANCING ACTIVITIES	(450,194)	(167,372)
Effect of exchange rate changes on cash and cash equivalents	(1,614)	234
Decrease in cash, cash equivalents and restricted cash	(41,775)	(18,790)
Cash, cash equivalents and restricted cash at beginning of period	219,571	249,354
Cash and cash equivalents at end of period	$ 177,796	$ 230,564

Consolidated Statements of Chan

Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Treasury Stock at Cost	Accumulated Other Comprehensive (Loss) Income
Beginning Balance (in shares) at Dec. 26, 2020		68,183,702			29,797,639
Beginning Balance at Dec. 26, 2020	$ 691,835	$ 682	$ 228,875	$ 2,046,238	$ (1,581,961)	$ (1,999)
Net income	77,240			77,240
Dividends	(8,067)			(8,067)
Issuance of stock related to stock-based compensation plans (in shares)		28,594			6,087
Issuance of stock related to stock-based compensation plans	(1,164)		(307)		$ (857)
Stock-based compensation	4,029		4,029
Other comprehensive (loss) income	(954)					(954)
Ending Balance (in shares) at Mar. 27, 2021		68,212,296			29,803,726
Ending Balance at Mar. 27, 2021	762,919	$ 682	232,597	2,115,411	$ (1,582,818)	(2,953)
Beginning Balance (in shares) at Dec. 26, 2020		68,183,702			29,797,639
Beginning Balance at Dec. 26, 2020	691,835	$ 682	228,875	2,046,238	$ (1,581,961)	(1,999)
Net income	268,209
Ending Balance (in shares) at Sep. 25, 2021		68,231,013			30,122,427
Ending Balance at Sep. 25, 2021	899,690	$ 682	246,302	2,288,754	$ (1,633,109)	(2,939)
Beginning Balance (in shares) at Mar. 27, 2021		68,212,296			29,803,726
Beginning Balance at Mar. 27, 2021	762,919	$ 682	232,597	2,115,411	$ (1,582,818)	(2,953)
Net income	92,294			92,294
Dividends	(8,068)			(8,068)
Purchases of common stock (in shares)					150,000
Purchases of common stock	(23,837)				$ (23,837)
Issuance of stock related to stock-based compensation plans (in shares)		17,584			355
Issuance of stock related to stock-based compensation plans	(1,100)		(1,039)		$ (61)
Stock-based compensation	6,864		6,864
Other comprehensive (loss) income	1,101					1,101
Ending Balance (in shares) at Jun. 26, 2021		68,229,880			29,954,081
Ending Balance at Jun. 26, 2021	830,173	$ 682	238,422	2,199,637	$ (1,606,716)	(1,852)
Net income	98,675			98,675
Dividends	(9,558)			(9,558)
Purchases of common stock (in shares)					167,046
Purchases of common stock	(26,393)				$ (26,393)
Issuance of stock related to stock-based compensation plans (in shares)		1,133			1,300
Issuance of stock related to stock-based compensation plans	56	$ 0	56		$ 0
Stock-based compensation	7,824		7,824
Other comprehensive (loss) income	(1,087)					(1,087)
Ending Balance (in shares) at Sep. 25, 2021		68,231,013			30,122,427
Ending Balance at Sep. 25, 2021	899,690	$ 682	246,302	2,288,754	$ (1,633,109)	(2,939)
Beginning Balance (in shares) at Dec. 25, 2021		68,232,975			30,539,235
Beginning Balance at Dec. 25, 2021	862,010	$ 682	255,148	2,317,184	$ (1,705,601)	(5,403)
Net income	124,839			124,839
Dividends	(9,324)			(9,324)
Purchases of common stock (in shares)					693,550
Purchases of common stock	(109,332)				$ (109,332)
Issuance of stock related to stock-based compensation plans (in shares)		137,176			10,033
Issuance of stock related to stock-based compensation plans	(10,127)	$ 2	(8,913)		$ (1,216)
Stock-based compensation	1,995		1,995
Other comprehensive (loss) income	(3,912)					(3,912)
Ending Balance (in shares) at Mar. 26, 2022		68,370,151			31,242,818
Ending Balance at Mar. 26, 2022	856,149	$ 684	248,230	2,432,699	$ (1,816,149)	(9,315)
Beginning Balance (in shares) at Dec. 25, 2021		68,232,975			30,539,235
Beginning Balance at Dec. 25, 2021	862,010	$ 682	255,148	2,317,184	$ (1,705,601)	(5,403)
Net income	337,612
Ending Balance (in shares) at Sep. 24, 2022		68,380,565			32,455,300
Ending Balance at Sep. 24, 2022	873,173	$ 684	255,486	2,625,290	$ (1,992,886)	(15,401)
Beginning Balance (in shares) at Mar. 26, 2022		68,370,151			31,242,818
Beginning Balance at Mar. 26, 2022	856,149	$ 684	248,230	2,432,699	$ (1,816,149)	(9,315)
Net income	112,555			112,555
Dividends	(9,257)			(9,257)
Purchases of common stock (in shares)					703,211
Purchases of common stock	(103,300)				$ (103,300)
Issuance of stock related to stock-based compensation plans (in shares)		6,783			587
Issuance of stock related to stock-based compensation plans	(86)				$ (86)
Stock-based compensation	3,815		3,815
Other comprehensive (loss) income	(3,006)					(3,006)
Ending Balance (in shares) at Jun. 25, 2022		68,376,934			31,946,616
Ending Balance at Jun. 25, 2022	856,870	$ 684	252,045	2,535,997	$ (1,919,535)	(12,321)
Net income	100,218			100,218
Dividends	(10,925)			(10,925)
Purchases of common stock (in shares)					504,065
Purchases of common stock	(73,351)				$ (73,351)
Issuance of stock related to stock-based compensation plans (in shares)		3,631			4,619
Issuance of stock related to stock-based compensation plans	(158)	$ 0	(158)		$ 0
Stock-based compensation	3,599		3,599
Other comprehensive (loss) income	(3,080)					(3,080)
Ending Balance (in shares) at Sep. 24, 2022		68,380,565			32,455,300
Ending Balance at Sep. 24, 2022	$ 873,173	$ 684	$ 255,486	$ 2,625,290	$ (1,992,886)	$ (15,401)

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - $ / shares	3 Months Ended						9 Months Ended
	Sep. 24, 2022	Jun. 25, 2022	Mar. 26, 2022	Sep. 25, 2021	Jun. 26, 2021	Mar. 27, 2021	Sep. 24, 2022	Sep. 25, 2021
Dividends per common share	$ 0.3	$ 0.25	$ 0.25	$ 0.25	$ 0.21	$ 0.21	$ 0.8	$ 0.67

Significant Accounting Policies

Significant Accounting Policies	9 Months Ended
Significant Accounting Policies	Sep. 24, 2022
Significant Accounting Policies	(1) Significant Accounting Policies Revenue from Contracts with Customers – Disaggregation of Revenue The following table summarizes (i) the percentage of consolidated revenue generated by mode of transportation and (ii) the total amount of truck transportation revenue hauled by BCO Independent Contractors and Truck Brokerage Carriers generated by equipment type during the thirty-nine-week and thirteen-week periods ended September 24, 2022 and September 25, 2021 (dollars in thousands): Thirty Nine Weeks Ended Thirteen Weeks Ended Mode September 24, 2022 September 25, 2021 September 24, 2022 September 25, 2021 Truck – BCO Independent Contractors 35 % 41 % 35 % 40 % Truck – Truck Brokerage Carriers 53 % 50 % 53 % 51 % Rail intermodal 2 % 3 % 2 % 3 % Ocean and air cargo carriers 8 % 4 % 9 % 5 % Truck Equipment Type Van equipment $ 3,022,297 $ 2,502,025 $ 914,154 $ 918,115 Unsided/platform equipment $ 1,336,956 $ 1,112,358 $ 453,924 $ 422,979 Less-than-truckload $ 105,994 $ 85,551 $ 35,343 $ 30,819 Other truck transportation (1) $ 632,001 $ 518,472 $ 195,345 $ 208,817 (1) Includes power-only, expedited, straight truck, cargo van, and miscellaneous other truck transportation revenue generated by the transportation logistics segment. Power-only refers to shipments where the Company furnishes a power unit and an operator but not trailing equipment, which is typically provided by the shipper or consignee.

Share-based Payment Arrangement

Share-based Payment Arrangements	9 Months Ended
Share-based Payment Arrangements	Sep. 24, 2022
Share-based Payment Arrangements	(2) Share-based Payment Arrangements As of September 24, 2022, the Company has an employee equity incentive plan, the 2011 equity incentive plan (the “2011 EIP”). The Company also has a stock compensation plan for members of its Board of Directors, the 2022 Directors Stock Compensation Plan (the “2022 DSCP”), which replaced the Amended and Restated 2013 Directors Stock Compensation Plan (as amended and restated, the “2013 DSCP”). At the Company’s 2022 Annual Meeting of Stockholders held on May 11, 2022, the Company’s stockholders approved the 2022 DSCP. The provisions of the 2022 DSCP are substantially similar to the provisions of the 2013 DSCP. 6,000,000 shares of the Company’s common stock were authorized for issuance under the 2011 EIP, and 200,000 shares of the Company’s common stock were authorized for issuance under the 2022 DSCP. No further grants can be made under the 2013 DSCP, including 56,502 shares of the Company’s common stock previously reserved for issuance, but not issued, under the 2013 DSCP. The 2011 EIP, 2013 DSCP and 2022 DSCP are each referred to herein as a “Plan,” and, collectively, as the “Plans.” Amounts recognized in the financial statements with respect to these Plans are as follows (in thousands): Thirty Nine Weeks Ended Thirteen Weeks Ended September 24, 2022 September 25, 2021 September 24, 2022 September 25, 2021 Total cost of the Plans during the period $ 9,409 $ 18,717 $ 3,599 $ 7,824 Amount of related income tax benefit recognized during the period (5,219 ) (5,636 ) (949 ) (1,919 ) Net cost of the Plans during the period $ 4,190 $ 13,081 $ 2,650 $ 5,905 Included in income tax benefits recognized in the thirty-nine-week periods ended September 24, 2022 and September 25, 2021 were excess tax benefits from stock-based awards of $2,910,000 and $1,039,000 respectively. As of September 24, 2022, there were 193,217 shares of the Company’s common stock reserved for issuance under the 2022 DSCP and 3,245,251 shares of the Company’s common stock reserved for issuance under the 2011 EIP. Restricted Stock Units The following table summarizes information regarding the Company’s outstanding restricted stock unit (“RSU”) awards with either a performance condition or a market condition under the Plans: Number of Weighted Average Grant Date Outstanding at December 25, 2021 209,399 $ 102.90 Granted 49,825 $ 139.54 Shares earned in excess of target (1) 91,497 $ 92.58 Vested shares, including shares earned in excess of target (177,146 ) $ 95.48 Forfeited (21,989 ) $ 113.85 Outstanding at September 24, 2022 151,586 $ 115.80 (1) Represents additional shares earned under each of the February 2, 2017 , , under each such award. During the thirty-nine-week period ended September 24, 2022, the Company granted RSUs with a performance condition. Outstanding RSUs at both December 25, 2021 and September 24, 2022 include RSUs with a performance condition and RSUs with a market condition, as further described below and in the Company’s 2021 Annual Report on Form 10-K. RSUs with a performance condition granted on January 28, 2022 may vest on January 31 of 2025, 2026 and 2027 based on growth in operating income and pre-tax The Company recognized approximately $7,035,000 and $16,223,000 of share-based compensation expense related to RSU awards in the thirty-nine-week periods ended September 24, 2022 and September 25, 2021, respectively. As of September 24, 2022, there was a maximum of $19.7 million of total unrecognized compensation cost related to RSU awards granted under the Plans with an expected average remaining life of approximately 3.6 years. With respect to RSU awards with a performance condition, the amount of future compensation expense to be recognized will be determined based on future operating results. Non-vested The following table summarizes information regarding the Company’s outstanding shares of non-vested Number of Shares and Deferred Stock Weighted Average Grant Date Fair Value Non-vested 56,436 $ 125.16 Granted 25,354 $ 152.54 Vested (27,074 ) $ 122.68 Forfeited (6,921 ) $ 144.45 Non-vested 47,795 $ 138.30 The fair value of each share of non-vested non-vested As of September 24, 2022, there was $4,375,000 of total unrecognized compensation cost related to non-vested non-vested Stock Options The following table summarizes information regarding the Company’s outstanding stock options under the Plans: Number of Weighted Average Weighted Average Aggregate Intrinsic Options outstanding at December 25, 2021 8,570 $ 55.42 Exercised (4,100 ) $ 54.36 Options outstanding at September 24, 2022 4,470 $ 56.40 0.4 $ 386 Options exercisable at September 24, 2022 4,470 $ 56.40 0.4 $ 386 The total intrinsic value of stock options exercised during the thirty-nine-week periods ended September 24, 2022 and September 25, 2021 was $429,000 and $644,000, respectively. As of September 24, 2022, there was no unrecognized compensation cost related to stock options granted under the Plans.

Income Taxes

Income Taxes	9 Months Ended
Income Taxes	Sep. 24, 2022
Income Taxes	(3) Income Taxes The provisions for income taxes for the 2022 and 2021 thirty-nine-week periods were based on estimated annual effective income tax rates of 24.5% and 24.4%, respectively, adjusted for discrete events, such as benefits resulting from stock-based awards. The estimated annual effective income tax rate was higher than the statutory federal income tax rate of 21% in both periods primarily attributable to state taxes and non-deductible

Earnings Per Share

Earnings Per Share	9 Months Ended
Earnings Per Share	Sep. 24, 2022
Earnings Per Share	(4) Earnings Per Share Earnings per common share are based on the weighted average number of shares outstanding, including outstanding non-vested non-vested For each of the thirty-nine-week periods ended September 24, 2022 and September 25, 2021, no options outstanding to purchase shares of common stock were antidilutive. Outstanding RSUs were excluded from the calculation of diluted earnings per share for all periods because the performance metric requirements or market condition for vesting had not been satisfied.

Additional Cash Flow Informatio

Additional Cash Flow Information	9 Months Ended
Additional Cash Flow Information	Sep. 24, 2022
Additional Cash Flow Information	(5) Additional Cash Flow Information During the 2022 thirty-nine-week period, Landstar paid income taxes and interest of $125,690,000 and $3,101,000, respectively. During the 2021 thirty-nine-week period, Landstar paid income taxes and interest of $71,823,000 and $2,780,000, respectively. Landstar acquired operating property by entering into finance leases in the amount of $26,741,000 and $23,080,000 in the 2022 and 2021 thirty-nine-week periods, respectively.

Segment Information

Segment Information	9 Months Ended
Segment Information	Sep. 24, 2022
Segment Information	(6) Segment Information The following table summarizes information about the Company’s reportable business segments as of and for the thirty-nine-week and thirteen-week periods ended September 24, 2022 and September 25, 2021: Thirty Nine Weeks Ended September 24, 2022 September 25, 2021 Transportation Logistics Insurance Total Transportation Logistics Insurance Total External revenue $ 5,702,959 $ 58,836 $ 5,761,795 $ 4,539,561 $ 52,990 $ 4,592,551 Internal revenue 65,753 65,753 53,028 53,028 Investment income 2,023 2,023 2,138 2,138 Operating income 412,054 34,695 446,749 323,370 33,558 356,928 Expenditures on long-lived assets 21,096 21,096 18,561 18,561 Goodwill 41,004 41,004 40,980 40,980 Thirteen Weeks Ended September 24, 2022 September 25, 2021 Transportation Logistics Insurance Total Transportation Logistics Insurance Total External revenue $ 1,796,401 $ 19,731 $ 1,816,132 $ 1,716,004 $ 18,295 $ 1,734,299 Internal revenue 12,883 12,883 9,533 9,533 Investment income 716 716 706 706 Operating income 120,164 13,334 133,498 123,410 8,002 131,412 Expenditures on long-lived assets 13,629 13,629 9,561 9,561 In the thirty-nine-week periods ended September 24, 2022 and September 25, 2021, no single customer accounted for more than 10% of the Company’s consolidated revenue.

Other Comprehensive Income

Other Comprehensive Income	9 Months Ended
Other Comprehensive Income	Sep. 24, 2022
Other Comprehensive Income	(7) Other Comprehensive Income The following table presents the components of and changes in accumulated other comprehensive income (loss), net of related income taxes, as of and for the thirty-nine-week period ended September 24, 2022 (in thousands): Unrealized Available-for-Sale Foreign Currency Total Balance as of December 25, 2021 $ 113 $ (5,516 ) $ (5,403 ) Other comprehensive loss (8,987 ) (1,011 ) (9,998 ) Balance as of September 24, 2022 $ (8,874 ) $ (6,527 ) $ (15,401 ) Amounts reclassified from accumulated other comprehensive income to investment income due to the realization of previously unrealized gains and losses in the accompanying consolidated statements of income were not significant for the thirty-nine-week period ended September 24, 2022.

Investments

Investments	9 Months Ended
Investments	Sep. 24, 2022
Investments	(8) Investments Investments include primarily investment-grade corporate bonds and asset-backed securities having maturities of up to five years (the “bond portfolio”) and money market investments. Investments in the bond portfolio are reported as available-for-sale available-for-sale non-transferability, The amortized cost and fair values of available-for-sale Gross Gross Amortized Cost Unrealized Gains Unrealized Losses Fair Value September 24, 2022 Money market investments $ 22,062 $ — $ — $ 22,062 Asset-backed securities 19,742 — 2,666 17,076 Corporate bonds and direct obligations of government agencies 129,250 — 8,536 120,714 U.S. Treasury obligations 2,344 — 102 2,242 Total $ 173,398 $ — $ 11,304 $ 162,094 December 25, 2021 Money market investments $ 8,750 $ — $ — $ 8,750 Asset-backed securities 22,441 — 346 22,095 Corporate bonds and direct obligations of government agencies 137,916 1,406 966 138,356 U.S. Treasury obligations 2,342 50 — 2,392 Total $ 171,449 $ 1,456 $ 1,312 $ 171,593 For those available-for-sale Less than 12 months 12 months or longer Total Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss September 24, 2022 Asset-backed securities $ 3,224 $ 453 $ 13,852 $ 2,213 $ 17,076 $ 2,666 Corporate bonds and direct obligations of government agencies 68,854 2,732 51,860 5,804 120,714 8,536 U.S. Treasury obligations 2,242 102 — — 2,242 102 Total $ 74,320 $ 3,287 $ 65,712 $ 8,017 $ 140,032 $ 11,304 December 25, 2021 Asset-backed securities $ 22,095 $ 346 $ — $ — $ 22,095 $ 346 Corporate bonds and direct obligations of government agencies 72,526 966 — — 72,526 966 Total $ 94,621 $ 1,312 $ — $ — $ 94,621 $ 1,312 The Company believes unrealized losses on investments were primarily caused by rising interest rates rather than changes in credit quality. The Company expects to recover, through collection of all of the contractual cash flows of each security, the amortized cost basis of these securities as it does not intend to sell, and does not anticipate being required to sell, these securities before recovery of the cost basis. For these reasons, no losses have been recognized in the Company’s consolidated statements of income.

Leases

Leases	9 Months Ended
Leases	Sep. 24, 2022
Leases	(9) Leases Landstar’s noncancelable leases are primarily comprised of finance leases for the acquisition of new trailing equipment. Each finance lease for the acquisition of trailing equipment is a five year lease with a $1 purchase option for the applicable equipment at lease expiration. Substantially all of Landstar’s operating lease right-of-use These leases do not have significant rent escalation holidays, concessions, leasehold improvement incentives or other build-out “month-to-month” Most of Landstar’s operating leases include one or more options to renew. The exercise of lease renewal options is typically at Landstar’s sole discretion, and, as such, the majority of renewals to extend the lease terms are not included in the right-of-use As most of Landstar’s operating leases do not provide an implicit rate, Landstar utilized its incremental borrowing rate based on the information available at the lease commencement date in determining the present value of the lease payments. Landstar has a centrally managed treasury function; therefore, based on the applicable lease terms and the current economic environment, the Company applies a portfolio approach for determining the incremental borrowing rate. The components of lease cost for finance leases and operating leases for the thirty nine weeks ended September 24, 2022 were (in thousands): Finance leases: Amortization of right-of-use $ 16,455 Interest on lease liability 2,117 Total finance lease cost 18,572 Operating leases: Lease cost 2,587 Variable lease cost — Sublease income (3,711 ) Total net operating lease income (1,124 ) Total net lease cost $ 17,448 A summary of the lease classification on our consolidated balance sheet as of September 24, 2022 is as follows (in thousands): Assets: Operating lease right-of-use Other assets $ 1,628 Finance lease assets Operating property, less accumulated depreciation and amortization 146,903 Total lease assets $ 148,531 Liabilities: The following table reconciles the undiscounted cash flows for the finance and operating leases to the finance and operating lease liabilities recorded on the balance sheet at September 24, 2022 (in thousands): Finance Leases Operating Leases 2022 Remainder $ 10,680 $ 194 2023 37,822 705 2024 27,969 542 2025 21,771 285 2026 13,633 — Thereafter 3,214 — Total future minimum lease payments 115,089 1,726 Less amount representing interest (1.6% to 4.6%) 5,619 98 Present value of minimum lease payments $ 109,470 $ 1,628 Current maturities of long-term debt 37,375 Long-term debt, excluding current maturities 72,095 Other current liabilities 715 Deferred income taxes and other noncurrent liabilities 913 The weighted average remaining lease term and the weighted average discount rate for finance and operating leases as of September 24, 2022 were: Finance Leases Operating Leases Weighted average remaining lease term (years) 3.5 2.6 Weighted average discount rate 2.9 % 4.5 %

Debt

Debt	9 Months Ended
Debt	Sep. 24, 2022
Debt	(10) Debt Other than finance lease obligations as presented on the consolidated balance sheets, the Company had no outstanding debt as of September 24, 2022 and December 25, 2021. On August 18, 2020, Landstar entered into an amended and restated credit agreement with a syndicate of banks and JPMorgan Chase Bank, N.A., as administrative agent (the “First Amended and Restated Credit Agreement”). As previously disclosed in a Form 8-K The Second Amended and Restated Credit Agreement, which superseded and replaced the First Amended and Restated Credit Agreement, is referred to herein as the “Credit Agreement.” As of September 24, 2022, there were no borrowings outstanding under the revolving credit facility of the Credit Agreement. The revolving credit loans under the Credit Agreement, at the option of Landstar, bear interest at (i) a forward-looking term rate based on the secured overnight financing rate plus 0.10% and an applicable margin ranging from 1.25% to 2.00%, or (ii) an alternate base rate plus an applicable margin ranging from 0.25% to 1.00%, in each case with the applicable margin determined based upon the Company’s Leverage Ratio, as defined in the Credit Agreement, at the end of the most recent applicable fiscal quarter for which financial statements have been delivered. The revolving credit facility bears a commitment fee, payable quarterly in arrears, of 0.20% to 0.30%, based on the Company’s Leverage Ratio at the end of the most recent applicable fiscal quarter for which financial statements have been delivered. The Credit Agreement contains a number of covenants that limit, among other things, the incurrence of additional indebtedness. The Company is required to, among other things, maintain a minimum fixed charge coverage ratio, as described in the Credit Agreement, and maintain a Leverage Ratio, as defined in the Credit Agreement, below a specified maximum. The Credit Agreement provides for a restriction on cash dividends and other distributions to stockholders on the Company’s capital stock to the extent there is a default under the Credit Agreement. In addition, the Credit Agreement under certain circumstances limits the amount of such cash dividends and other distributions to stockholders to the extent that, after giving effect to any payment made to effect such cash dividend or other distribution, the Leverage Ratio would exceed 2.5 The interest rates on borrowings under the revolving credit facility are typically tied to short-term interest rates and, as such, carrying value approximates fair value. Interest rates on borrowings under finance leases approximate the interest rates that would currently be available to the Company under similar terms and, as such, carrying value approximates fair value.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
Commitments and Contingencies	Sep. 24, 2022
Commitments and Contingencies	(11) Commitments and Contingencies Short-term investments include $50,637,000 in current maturities of investments held by the Company’s insurance segment at September 24, 2022. The non-current non-current The Company is involved in certain claims and pending litigation arising from the normal conduct of business. Many of these claims are covered in whole or in part by insurance. Based on knowledge of the facts and, in certain cases, opinions of outside counsel, management believes that adequate provisions have been made for probable losses with respect to the resolution of all such claims and pending litigation and that the ultimate outcome, after provisions therefor, will not have a material adverse effect on the financial condition of the Company, but could have a material effect on the results of operations in a given quarter or year.

Equity Investment

Equity Investment	9 Months Ended
Equity Investment	Sep. 24, 2022
Equity Securities without Readily Determinable Fair Value, Annual Amount [Abstract]
Equity investment	(12) Equity investment On April 1, 2022, Landstar Investment Holdco, LLC, a newly formed Delaware LLC and wholly owned subsidiary of Landstar System Holdings, Inc., purchased Class A units of Cavnue, LLC, for approximately $4,999,000 in cash consideration. Cavnue, LLC is a privately held company focused on combining technology and road infrastructure to unlock the full potential of connected and autonomous vehicles. This non-controlling non-marketable non-marketable

Significant Accounting Polici_2

Significant Accounting Policies (Policies)	9 Months Ended
Significant Accounting Policies (Policies)	Sep. 24, 2022
Revenue from Contracts with Customers – Disaggregation of Revenue	Revenue from Contracts with Customers – Disaggregation of Revenue The following table summarizes (i) the percentage of consolidated revenue generated by mode of transportation and (ii) the total amount of truck transportation revenue hauled by BCO Independent Contractors and Truck Brokerage Carriers generated by equipment type during the thirty-nine-week and thirteen-week periods ended September 24, 2022 and September 25, 2021 (dollars in thousands): Thirty Nine Weeks Ended Thirteen Weeks Ended Mode September 24, 2022 September 25, 2021 September 24, 2022 September 25, 2021 Truck – BCO Independent Contractors 35 % 41 % 35 % 40 % Truck – Truck Brokerage Carriers 53 % 50 % 53 % 51 % Rail intermodal 2 % 3 % 2 % 3 % Ocean and air cargo carriers 8 % 4 % 9 % 5 % Truck Equipment Type Van equipment $ 3,022,297 $ 2,502,025 $ 914,154 $ 918,115 Unsided/platform equipment $ 1,336,956 $ 1,112,358 $ 453,924 $ 422,979 Less-than-truckload $ 105,994 $ 85,551 $ 35,343 $ 30,819 Other truck transportation (1) $ 632,001 $ 518,472 $ 195,345 $ 208,817 (1) Includes power-only, expedited, straight truck, cargo van, and miscellaneous other truck transportation revenue generated by the transportation logistics segment. Power-only refers to shipments where the Company furnishes a power unit and an operator but not trailing equipment, which is typically provided by the shipper or consignee.

Significant Accounting Polici_3

Significant Accounting Policies (Tables)	9 Months Ended
Significant Accounting Policies (Tables)	Sep. 24, 2022
Schedule of Disaggregation of Revenue	The following table summarizes (i) the percentage of consolidated revenue generated by mode of transportation and (ii) the total amount of truck transportation revenue hauled by BCO Independent Contractors and Truck Brokerage Carriers generated by equipment type during the thirty-nine-week and thirteen-week periods ended September 24, 2022 and September 25, 2021 (dollars in thousands): Thirty Nine Weeks Ended Thirteen Weeks Ended Mode September 24, 2022 September 25, 2021 September 24, 2022 September 25, 2021 Truck – BCO Independent Contractors 35 % 41 % 35 % 40 % Truck – Truck Brokerage Carriers 53 % 50 % 53 % 51 % Rail intermodal 2 % 3 % 2 % 3 % Ocean and air cargo carriers 8 % 4 % 9 % 5 % Truck Equipment Type Van equipment $ 3,022,297 $ 2,502,025 $ 914,154 $ 918,115 Unsided/platform equipment $ 1,336,956 $ 1,112,358 $ 453,924 $ 422,979 Less-than-truckload $ 105,994 $ 85,551 $ 35,343 $ 30,819 Other truck transportation (1) $ 632,001 $ 518,472 $ 195,345 $ 208,817 (1) Includes power-only, expedited, straight truck, cargo van, and miscellaneous other truck transportation revenue generated by the transportation logistics segment. Power-only refers to shipments where the Company furnishes a power unit and an operator but not trailing equipment, which is typically provided by the shipper or consignee.

Share-based Payment Arrangeme_2

Share-based Payment Arrangements (Tables)	9 Months Ended
Share-based Payment Arrangements (Tables)	Sep. 24, 2022
Amounts Recognized in Financial Statements with Respect to Plans	Amounts recognized in the financial statements with respect to these Plans are as follows (in thousands): Thirty Nine Weeks Ended Thirteen Weeks Ended September 24, 2022 September 25, 2021 September 24, 2022 September 25, 2021 Total cost of the Plans during the period $ 9,409 $ 18,717 $ 3,599 $ 7,824 Amount of related income tax benefit recognized during the period (5,219 ) (5,636 ) (949 ) (1,919 ) Net cost of the Plans during the period $ 4,190 $ 13,081 $ 2,650 $ 5,905
Schedule of Information on Restricted Stock Units	The following table summarizes information regarding the Company’s outstanding restricted stock unit (“RSU”) awards with either a performance condition or a market condition under the Plans: Number of Weighted Average Grant Date Outstanding at December 25, 2021 209,399 $ 102.90 Granted 49,825 $ 139.54 Shares earned in excess of target (1) 91,497 $ 92.58 Vested shares, including shares earned in excess of target (177,146 ) $ 95.48 Forfeited (21,989 ) $ 113.85 Outstanding at September 24, 2022 151,586 $ 115.80 (1) Represents additional shares earned under each of the February 2, 2017 , , under each such award.
Schedule of Information on Non-Vested Restricted Stock and Deferred Stock Units	The following table summarizes information regarding the Company’s outstanding shares of non-vested Number of Shares and Deferred Stock Weighted Average Grant Date Fair Value Non-vested 56,436 $ 125.16 Granted 25,354 $ 152.54 Vested (27,074 ) $ 122.68 Forfeited (6,921 ) $ 144.45 Non-vested 47,795 $ 138.30
Summary of Information Regarding Stock Options	The following table summarizes information regarding the Company’s outstanding stock options under the Plans: Number of Weighted Average Weighted Average Aggregate Intrinsic Options outstanding at December 25, 2021 8,570 $ 55.42 Exercised (4,100 ) $ 54.36 Options outstanding at September 24, 2022 4,470 $ 56.40 0.4 $ 386 Options exercisable at September 24, 2022 4,470 $ 56.40 0.4 $ 386

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
Segment Information (Tables)	Sep. 24, 2022
Information Regarding Reportable Business Segments	The following table summarizes information about the Company’s reportable business segments as of and for the thirty-nine-week and thirteen-week periods ended September 24, 2022 and September 25, 2021: Thirty Nine Weeks Ended September 24, 2022 September 25, 2021 Transportation Logistics Insurance Total Transportation Logistics Insurance Total External revenue $ 5,702,959 $ 58,836 $ 5,761,795 $ 4,539,561 $ 52,990 $ 4,592,551 Internal revenue 65,753 65,753 53,028 53,028 Investment income 2,023 2,023 2,138 2,138 Operating income 412,054 34,695 446,749 323,370 33,558 356,928 Expenditures on long-lived assets 21,096 21,096 18,561 18,561 Goodwill 41,004 41,004 40,980 40,980 Thirteen Weeks Ended September 24, 2022 September 25, 2021 Transportation Logistics Insurance Total Transportation Logistics Insurance Total External revenue $ 1,796,401 $ 19,731 $ 1,816,132 $ 1,716,004 $ 18,295 $ 1,734,299 Internal revenue 12,883 12,883 9,533 9,533 Investment income 716 716 706 706 Operating income 120,164 13,334 133,498 123,410 8,002 131,412 Expenditures on long-lived assets 13,629 13,629 9,561 9,561

Other Comprehensive Income (Tab

Other Comprehensive Income (Tables)	9 Months Ended
Other Comprehensive Income (Tables)	Sep. 24, 2022
Components of and Changes in Accumulated Other Comprehensive Income, Net of Related Income Taxes	The following table presents the components of and changes in accumulated other comprehensive income (loss), net of related income taxes, as of and for the thirty-nine-week period ended September 24, 2022 (in thousands): Unrealized Available-for-Sale Foreign Currency Total Balance as of December 25, 2021 $ 113 $ (5,516 ) $ (5,403 ) Other comprehensive loss (8,987 ) (1,011 ) (9,998 ) Balance as of September 24, 2022 $ (8,874 ) $ (6,527 ) $ (15,401 )

Investments (Tables)

Investments (Tables)	9 Months Ended
Investments (Tables)	Sep. 24, 2022
Amortized Cost and Fair Value of Available-for-Sale Investments	The amortized cost and fair values of available-for-sale Gross Gross Amortized Cost Unrealized Gains Unrealized Losses Fair Value September 24, 2022 Money market investments $ 22,062 $ — $ — $ 22,062 Asset-backed securities 19,742 — 2,666 17,076 Corporate bonds and direct obligations of government agencies 129,250 — 8,536 120,714 U.S. Treasury obligations 2,344 — 102 2,242 Total $ 173,398 $ — $ 11,304 $ 162,094 December 25, 2021 Money market investments $ 8,750 $ — $ — $ 8,750 Asset-backed securities 22,441 — 346 22,095 Corporate bonds and direct obligations of government agencies 137,916 1,406 966 138,356 U.S. Treasury obligations 2,342 50 — 2,392 Total $ 171,449 $ 1,456 $ 1,312 $ 171,593
Schedule of Unrealized Loss on Available-for-Sale Investments	For those available-for-sale Less than 12 months 12 months or longer Total Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss September 24, 2022 Asset-backed securities $ 3,224 $ 453 $ 13,852 $ 2,213 $ 17,076 $ 2,666 Corporate bonds and direct obligations of government agencies 68,854 2,732 51,860 5,804 120,714 8,536 U.S. Treasury obligations 2,242 102 — — 2,242 102 Total $ 74,320 $ 3,287 $ 65,712 $ 8,017 $ 140,032 $ 11,304 December 25, 2021 Asset-backed securities $ 22,095 $ 346 $ — $ — $ 22,095 $ 346 Corporate bonds and direct obligations of government agencies 72,526 966 — — 72,526 966 Total $ 94,621 $ 1,312 $ — $ — $ 94,621 $ 1,312

Leases (Tables)

Leases (Tables)	9 Months Ended
Leases (Tables)	Sep. 24, 2022
Lease, Cost [Table Text Block]	The components of lease cost for finance leases and operating leases for the thirty nine weeks ended September 24, 2022 were (in thousands): Finance leases: Amortization of right-of-use $ 16,455 Interest on lease liability 2,117 Total finance lease cost 18,572 Operating leases: Lease cost 2,587 Variable lease cost — Sublease income (3,711 ) Total net operating lease income (1,124 ) Total net lease cost $ 17,448
Schedule Of Supplemental Balance Sheet Information Related To Leases [Table Text Block]	A summary of the lease classification on our consolidated balance sheet as of September 24, 2022 is as follows (in thousands): Assets: Operating lease right-of-use Other assets $ 1,628 Finance lease assets Operating property, less accumulated depreciation and amortization 146,903 Total lease assets $ 148,531
Finance And Operating Lease Maturity [Table Text Block]	Liabilities: The following table reconciles the undiscounted cash flows for the finance and operating leases to the finance and operating lease liabilities recorded on the balance sheet at September 24, 2022 (in thousands): Finance Leases Operating Leases 2022 Remainder $ 10,680 $ 194 2023 37,822 705 2024 27,969 542 2025 21,771 285 2026 13,633 — Thereafter 3,214 — Total future minimum lease payments 115,089 1,726 Less amount representing interest (1.6% to 4.6%) 5,619 98 Present value of minimum lease payments $ 109,470 $ 1,628 Current maturities of long-term debt 37,375 Long-term debt, excluding current maturities 72,095 Other current liabilities 715 Deferred income taxes and other noncurrent liabilities 913
Schedule Discount Rate And Lease Term Used In Calculating Lease Liabilities And Assets [Table Text Block]	The weighted average remaining lease term and the weighted average discount rate for finance and operating leases as of September 24, 2022 were: Finance Leases Operating Leases Weighted average remaining lease term (years) 3.5 2.6 Weighted average discount rate 2.9 % 4.5 %

Schedule Of Revenue By Major Cu

Schedule Of Revenue By Major Customers By Reporting Segments (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 24, 2022	Sep. 25, 2021	Sep. 24, 2022	Sep. 25, 2021
Disaggregation of Revenue [Line Items]
Revenue	$ 1,816,132	$ 1,734,299	$ 5,761,795	$ 4,592,551
BCO Independent Contractors – Truck
Disaggregation of Revenue [Line Items]
Percentage of consolidated revenue	35%	40%	35%	41%
Brokerage Carriers - Truck
Disaggregation of Revenue [Line Items]
Percentage of consolidated revenue	53%	51%	53%	50%
Rail Intermodal
Disaggregation of Revenue [Line Items]
Percentage of consolidated revenue	2%	3%	2%	3%
Ocean and air cargo carriers
Disaggregation of Revenue [Line Items]
Percentage of consolidated revenue	9%	5%	8%	4%
BCO Independent Contractor Truck and Brokerage Carriers Truck \| Van Equipment
Disaggregation of Revenue [Line Items]
Revenue	$ 914,154	$ 918,115	$ 3,022,297	$ 2,502,025
BCO Independent Contractor Truck and Brokerage Carriers Truck \| Unsided/Platform Equipment
Disaggregation of Revenue [Line Items]
Revenue	453,924	422,979	1,336,956	1,112,358
BCO Independent Contractor Truck and Brokerage Carriers Truck \| Less than Truckload
Disaggregation of Revenue [Line Items]
Revenue	35,343	30,819	105,994	85,551
BCO Independent Contractor Truck and Brokerage Carriers Truck \| Other Truck Transportation
Disaggregation of Revenue [Line Items]
Revenue	$ 195,345	$ 208,817	$ 632,001	$ 518,472

Share-based Payment Arrangeme_3

Share-based Payment Arrangements - Additional Information (Detail) - USD ($)	9 Months Ended
	Sep. 24, 2022	Sep. 25, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Excess tax benefit from stock-based awards	$ 2,910,000	$ 1,039,000
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Recognized share-based compensation (benefit)/expense	7,035,000	16,223,000
Unrecognized compensation cost, other than options	$ 19,700,000
Unrecognized compensation cost expected to be recognized over period, years	3 years 7 months 6 days
Non Vested Restricted Stock and Deferred Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost, other than options	$ 4,375,000
Unrecognized compensation cost expected to be recognized over period, years	1 year 10 months 24 days
Terms of award	Company’s common stock on the date of grant. Shares of non-vested restricted stock are generally subject to vesting in three equal annual installments either on the first, second and third anniversary of the date of the grant or the third, fourth and fifth anniversary of the date of the grant, or 100% on the first or fifth anniversary of the date of the grant. For restricted stock awards granted under the 2022 DSCP, each recipient may elect to defer receipt of shares and instead receive restricted stock units (“Deferred Stock Units”), which represent contingent rights to receive shares of the Company’s common stock on the date of recipient separation
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total intrinsic value of stock options exercised during periods	$ 429,000	$ 644,000
Maximum \| Restricted Stock Units (RSUs) \| Prior to 2015 grant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum percentage of target available for common share issuance	100%
2011 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for issuance	3,245,251
2011 Equity Incentive Plan \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock authorized for issuance	6,000,000
2013 Directors Stock Compensation Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock previously reserved for issuance	56,502
Number of shares available for grant	0
2022 Directors Stock Compensation Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock authorized for issuance	200,000
Common stock reserved for issuance	193,217
2022 Directors Stock Compensation Plan \| Deferred Stock Unit
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock vesting percentage	100%

Amounts Recognized in Financial

Amounts Recognized in Financial Statements with Respect to Plans (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 24, 2022	Sep. 25, 2021	Sep. 24, 2022	Sep. 25, 2021
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total cost of the Plans during the period	$ 3,599	$ 7,824	$ 9,409	$ 18,717
Amount of related income tax benefit recognized during the period	(949)	(1,919)	(5,219)	(5,636)
Net cost of the Plans during the period	$ 2,650	$ 5,905	$ 4,190	$ 13,081

Schedule of Information on Rest

Schedule of Information on Restricted Stock Units (Detail) - Restricted Stock Units (RSUs)	9 Months Ended
	Sep. 24, 2022 $ / shares shares
Number of Shares
Beginning Balance \| shares	209,399
Granted \| shares	49,825
Shares earned in excess of target \| shares	91,497
Vested shares, including shares earned in excess of target \| shares	(177,146)
Forfeited \| shares	(21,989)
Ending Balance \| shares	151,586
Weighted Average Grant Date Fair Value
Beginning Balance \| $ / shares	$ 102.9
Granted \| $ / shares	139.54
Shares earned in excess of target \| $ / shares	92.58
Vested shares, including shares earned in excess of target \| $ / shares	95.48
Forfeited \| $ / shares	113.85
Ending Balance \| $ / shares	$ 115.8

Schedule of Information on Non

Schedule of Information on Non - Vested Restricted Stock Units (Detail) - Non Vested Restricted Stock and Deferred Stock Units	9 Months Ended
	Sep. 24, 2022 $ / shares shares
Number of Shares and Deferred Stock Units
Beginning Balance \| shares	56,436
Granted \| shares	25,354
Vested \| shares	(27,074)
Forfeited \| shares	(6,921)
Ending Balance \| shares	47,795
Weighted Average Grant Date Fair Value
Beginning Balance \| $ / shares	$ 125.16
Granted \| $ / shares	152.54
Vested \| $ / shares	122.68
Forfeited \| $ / shares	144.45
Ending Balance \| $ / shares	$ 138.3

Summary of Information Regardin

Summary of Information Regarding Stock Options (Detail) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 24, 2022 USD ($) $ / shares shares
Number of Options
Beginning Balance, number of options \| shares	8,570
Exercised, number of options \| shares	(4,100)
Ending Balance, number of options \| shares	4,470
Weighted Average Exercise Price per Share
Beginning Balance, Weighted Average Exercise Price per Share \| $ / shares	$ 55.42
Exercised, Weighted Average Exercise Price per Share \| $ / shares	54.36
Ending Balance, Weighted Average Exercise Price per Share \| $ / shares	$ 56.4
Options Exercisable, Number of Options
Options exercisable at the ending, Number of Options \| shares	4,470
Options Exercisable, Weighted Average Exercise Price per Share
Options exercisable at the ending, Weighted Average Exercise Price per Share \| $ / shares	$ 56.4
Weighted Average Remaining Contractual Term (years)
Options outstanding at September 24, 2022	4 months 24 days
Options exercisable at September 24, 2022	4 months 24 days
Aggregate Intrinsic Value
Options outstanding at September 24, 2022 \| $	$ 386
Options exercisable at September 24, 2022 \| $	$ 386

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail)	9 Months Ended
Income Taxes - Additional Information (Detail)	Sep. 24, 2022	Sep. 25, 2021
Income Taxes [Line Items]
Corporate income tax rate	21%	21%
Estimated annual effective income tax rate	24.50%	24.40%
Effective income tax rate	23.90%	24.20%

Earnings Per Share - Additional

Earnings Per Share - Additional Information (Detail) - shares	9 Months Ended
	Sep. 24, 2022	Sep. 25, 2021
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock options excluded from calculation of diluted earnings per share, antidilutive	0	0

Additional Cash Flow Informat_2

Additional Cash Flow Information - Additional Information (Detail) - USD ($)	9 Months Ended
	Sep. 24, 2022	Sep. 25, 2021
Supplemental Cash Flow Information [Abstract]
Income taxes paid	$ 125,690,000	$ 71,823,000
Interest paid	3,101,000	2,780,000
Capital Lease Obligations Incurred	$ 26,741,000	$ 23,080,000

Segment Information - Additiona

Segment Information - Additional Information (Detail) - Customer	9 Months Ended
	Sep. 24, 2022	Sep. 25, 2021
Segment Reporting Information [Line Items]
Number of customers accounting for 10 percent or more of total revenue	0	0
No single customer accounted for benchmark percentage to be considered major customer	10%	10%

Information Regarding Reportabl

Information Regarding Reportable Business Segments (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 24, 2022	Sep. 25, 2021	Sep. 24, 2022	Sep. 25, 2021	Dec. 25, 2021
Segment Reporting Information [Line Items]
External revenue	$ 1,816,132	$ 1,734,299	$ 5,761,795	$ 4,592,551
Internal revenue	12,883	9,533	65,753	53,028
Investment income	716	706	2,023	2,138
Operating income	133,498	131,412	446,749	356,928
Expenditures on long-lived assets	13,629	9,561	21,096	18,561
Goodwill	41,004	40,980	41,004	40,980	$ 40,768
Transportation Logistics
Segment Reporting Information [Line Items]
External revenue	1,796,401	1,716,004	5,702,959	4,539,561
Operating income	120,164	123,410	412,054	323,370
Expenditures on long-lived assets	13,629	9,561	21,096	18,561
Goodwill	41,004	40,980	41,004	40,980
Insurance
Segment Reporting Information [Line Items]
External revenue	19,731	18,295	58,836	52,990
Internal revenue	12,883	9,533	65,753	53,028
Investment income	716	706	2,023	2,138
Operating income	$ 13,334	$ 8,002	$ 34,695	$ 33,558

Components of and Changes in Ac

Components of and Changes in Accumulated Other Comprehensive Income, Net of Related Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 24, 2022	Sep. 25, 2021	Sep. 24, 2022	Sep. 25, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			$ 862,010
Other comprehensive loss	$ (3,080)	$ (1,087)	(9,998)	$ (940)
Ending Balance	873,173		873,173
Unrealized Holding Gains (Losses) on Available-for-Sale Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			113
Other comprehensive loss			(8,987)
Ending Balance	(8,874)		(8,874)
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			(5,516)
Other comprehensive loss			(1,011)
Ending Balance	(6,527)		(6,527)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			(5,403)
Other comprehensive loss			(9,998)
Ending Balance	$ (15,401)		$ (15,401)

Investments - Additional Inform

Investments - Additional Information (Detail) - USD ($)	9 Months Ended
Investments - Additional Information (Detail) - USD ($)	Sep. 24, 2022	Dec. 25, 2021
Debt Securities, Available-for-sale [Line Items]
Investments maximum maturity period	5 years
Unrealized gain (loss), net of unrealized gains/losses, on the investments in the bond portfolio	$ (11,304,000)	$ 144,000

Amortized Cost and Fair Value o

Amortized Cost and Fair Value of Available-for-Sale Investments (Detail) - USD ($) $ in Thousands	Sep. 24, 2022	Dec. 25, 2021
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 173,398	$ 171,449
Gross Unrealized Gains	0	1,456
Gross Unrealized Losses	11,304	1,312
Fair Value	162,094	171,593
Money market investments
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	22,062	8,750
Fair Value	22,062	8,750
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	19,742	22,441
Gross Unrealized Losses	2,666	346
Fair Value	17,076	22,095
Corporate bonds and direct obligations of government agencies
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	129,250	137,916
Gross Unrealized Gains		1,406
Gross Unrealized Losses	8,536	966
Fair Value	120,714	138,356
U.S. Treasury obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	2,344	2,342
Gross Unrealized Gains		50
Gross Unrealized Losses	102
Fair Value	$ 2,242	$ 2,392

Schedule of Unrealized Loss on

Schedule of Unrealized Loss on Available-for-Sale Investments (Detail) - USD ($) $ in Thousands	Sep. 24, 2022	Dec. 25, 2021
Debt Securities, Available-for-sale [Line Items]
Available-for-sale investments with unrealized losses, Less than 12 months, Fair Value	$ 74,320	$ 94,621
Available-for-sale investments with unrealized losses, Less than 12 months, Unrealized Loss	3,287	1,312
Available-for-sale investments with unrealized losses, 12 months or longer, Fair Value	65,712
Available-for-sale investments with unrealized losses, 12 months or longer, Unrealized Loss	8,017
Available-for-sale investments with unrealized losses, Fair Value, Total	140,032	94,621
Available-for-sale investments with unrealized losses, Unrealized Loss, Total	11,304	1,312
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Available-for-sale investments with unrealized losses, Less than 12 months, Fair Value	3,224	22,095
Available-for-sale investments with unrealized losses, Less than 12 months, Unrealized Loss	453	346
Available-for-sale investments with unrealized losses, 12 months or longer, Fair Value	13,852
Available-for-sale investments with unrealized losses, 12 months or longer, Unrealized Loss	2,213
Available-for-sale investments with unrealized losses, Fair Value, Total	17,076	22,095
Available-for-sale investments with unrealized losses, Unrealized Loss, Total	2,666	346
Corporate bonds and direct obligations of government agencies
Debt Securities, Available-for-sale [Line Items]
Available-for-sale investments with unrealized losses, Less than 12 months, Fair Value	68,854	72,526
Available-for-sale investments with unrealized losses, Less than 12 months, Unrealized Loss	2,732	966
Available-for-sale investments with unrealized losses, 12 months or longer, Fair Value	51,860
Available-for-sale investments with unrealized losses, 12 months or longer, Unrealized Loss	5,804
Available-for-sale investments with unrealized losses, Fair Value, Total	120,714	72,526
Available-for-sale investments with unrealized losses, Unrealized Loss, Total	8,536	$ 966
U.S. Treasury obligations
Debt Securities, Available-for-sale [Line Items]
Available-for-sale investments with unrealized losses, Less than 12 months, Fair Value	2,242
Available-for-sale investments with unrealized losses, Less than 12 months, Unrealized Loss	102
Available-for-sale investments with unrealized losses, Fair Value, Total	2,242
Available-for-sale investments with unrealized losses, Unrealized Loss, Total	$ 102

Leases - Additional Information

Leases - Additional Information (Detail)	Sep. 24, 2022 USD ($)
Leases Disclosure [Line Items]
Finance Lease Option to Purchase Option Value	$ 1
Lessee, Finance Lease, Term of Contract	5 years

Leases - Components of Lease Co

Leases - Components of Lease Cost for Finance Leases and Operating Leases (Detail) $ in Thousands	9 Months Ended
	Sep. 24, 2022 USD ($)
Finance leases:
Amortization of right-of-use assets	$ 16,455
Interest on lease liability	2,117
Total finance lease cost	18,572
Operating leases:
Lease cost	2,587
Sublease income	(3,711)
Total net operating lease income	(1,124)
Total net lease cost	$ 17,448

Leases - Classification on our

Leases - Classification on our Consolidated Balance Sheet (Detail) $ in Thousands	Sep. 24, 2022 USD ($)
Total lease assets	$ 148,531
Other Assets [Member]
Operating lease right-of-use assets	1,628
Property Plant and Equipment Net [Member]
Finance lease assets	$ 146,903

Leases - Undiscounted Cash Flow

Leases - Undiscounted Cash Flows for the Finance and Operating Leases (Detail) - USD ($) $ in Thousands	Sep. 24, 2022	Dec. 25, 2021
Operating Leased Assets [Line Items]
2022 Remainder	$ 10,680
2023	37,822
2024	27,969
2025	21,771
2026	13,633
Thereafter	3,214
Total future minimum lease payments	115,089
Less amount representing interest (1.6% to 4.4%)	5,619
Present value of minimum lease payments	109,470
Current maturities of long-term debt	37,375	$ 36,561
Long-term debt, excluding current maturities	72,095
2022 Remainder	194
2023	705
2024	542
2025	285
2026	0
Total future minimum lease payments	1,726
Less amount representing interest (1.6% to 4.6%)	98
Present value of minimum lease payments	1,628
Other current liabilities [Member]
Operating Leased Assets [Line Items]
Operating lease, liability, current	715
Deferred income taxes and other noncurrent liabilities [Member]
Operating Leased Assets [Line Items]
Operating lease, liability, non-current	$ 913

Leases - Undiscounted Cash Fl_2

Leases - Undiscounted Cash Flows for the Finance and Operating Leases (Parenthetical) (Details)	Sep. 24, 2022
Maximum [Member]
Finance lease Interest rate percentage	4.60%
Minimum [Member]
Finance lease Interest rate percentage	1.60%

Leases - Weighted Average Remai

Leases - Weighted Average Remaining Lease Term and the Weighted Average Discount Rate for Finance and Operating leases (Detail)	Sep. 24, 2022
Weighted average remaining lease term (years)	3 years 6 months
Weighted average discount rate	2.90%
Weighted average remaining lease term (years)	2 years 7 months 6 days
Weighted average discount rate	4.50%

Debt - Additional Information (

Debt - Additional Information (Detail) - USD ($)			9 Months Ended
Debt - Additional Information (Detail) - USD ($)	Jul. 01, 2022	Aug. 18, 2020	Sep. 24, 2022	Dec. 25, 2021
Revolving Credit Facility
Debt Instrument [Line Items]
Debt Outstanding Excluding Capital Lease Obligations			$ 0	$ 0
Credit facility, initiation date		Aug. 18, 2020
Credit facility, debt covenants compliance			The Company is currently in compliance with all of the debt covenants under the Credit Agreement.
Revolving Credit Facility \| Second Amended and Restated Credit Agreement [Member]
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity	$ 600,000,000
Additional overnight secured financing rate	0.10%
Revolving Credit Facility \| Minimum
Debt Instrument [Line Items]
Credit facility event of default, minimum percentage that a person or group should acquire outstanding capital stock			35%
Revolving Credit Facility \| Minimum \| Second Amended and Restated Credit Agreement [Member]
Debt Instrument [Line Items]
Credit facility, unused credit commitment fee	0.20%
Revolving Credit Facility \| Minimum \| Eurodollar [Member] \| Second Amended and Restated Credit Agreement [Member]
Debt Instrument [Line Items]
Borrowings, basis spread on variable rate	1.25%
Revolving Credit Facility \| Minimum \| Base Rate [Member] \| Second Amended and Restated Credit Agreement [Member]
Debt Instrument [Line Items]
Borrowings, basis spread on variable rate	0.25%
Revolving Credit Facility \| Maximum
Debt Instrument [Line Items]
Maximum Leverage ratio beyond which amount of cash dividends and other distributions to stockholders is limited			250%
Revolving Credit Facility \| Maximum \| Second Amended and Restated Credit Agreement [Member]
Debt Instrument [Line Items]
Credit facility, borrowing capacity	$ 300,000,000
Credit facility, unused credit commitment fee	0.30%
Revolving Credit Facility \| Maximum \| Eurodollar [Member] \| Second Amended and Restated Credit Agreement [Member]
Debt Instrument [Line Items]
Borrowings, basis spread on variable rate	2%
Revolving Credit Facility \| Maximum \| Base Rate [Member] \| Second Amended and Restated Credit Agreement [Member]
Debt Instrument [Line Items]
Borrowings, basis spread on variable rate	1%
Letter of Credit \| Second Amended and Restated Credit Agreement [Member]
Debt Instrument [Line Items]
Credit facility, borrowing capacity	$ 45,000,000

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail)	Sep. 24, 2022 USD ($)
Current Investments \| Collateral Pledged [Member]
Commitments and Contingencies Disclosure [Line Items]
Investments providing collateral for letters of credit to guarantee insurance claims	$ 50,637,000
Non-Current Investments
Commitments and Contingencies Disclosure [Line Items]
Total non-current investments	111,457,000
Non-Current Investments \| Collateral Pledged [Member]
Commitments and Contingencies Disclosure [Line Items]
Investments providing collateral for letters of credit to guarantee insurance claims	34,437,000
Revolving Credit Facility
Commitments and Contingencies Disclosure [Line Items]
Letters of credit outstanding	33,493,000
Guarantee Payment of Insurance Claims
Commitments and Contingencies Disclosure [Line Items]
Letters of credit outstanding	$ 76,567,000

Equity investment - Additional

Equity investment - Additional Information (Detail)	Apr. 01, 2022 USD ($)
Cavnue, LLC [Member] \| Landstar Investment Holdo LLC [Member]
Equity Securities without Readily Determinable Fair Value [Line Items]
Equity investment	$ 4,999,000