0001193125-24-130360 | 10-Q | XBRL Viewer

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.

Earnings Per Share	3 Months Ended
Earnings Per Share	Mar. 30, 2024
Earnings Per Share [Abstract]
Earnings Per Share	(4) Earnings Per Share Basic earnings per common share are based on the weighted average number of shares outstanding, which includes outstanding non-vested restricted stock and outstanding Deferred Stock Units. Diluted earnings per share are based on the weighted average number of common shares outstanding plus the incremental shares that would have been outstanding upon the assumed exercise of all dilutive stock options. For each of the thirteen-week periods ended March 30, 2024 and April 1, 2023, the weighted-average number of common shares outstanding is the same for purposes of the calculations of both basic and diluted earnings per share. During and as of the thirteen-week period ended March 30, 2024, there were no outstanding stock options issued by the Company. For the thirteen-week period ended April 1, 2023, the impact on earnings per share of future compensation expense related to outstanding, unvested time-based awards was greater than the incremental impact of outstanding dilutive stock options, and would therefore have an anti-dilutive effect on earnings per share if included in the calculation of earnings per share. Accordingly, the Company had no reconciling items between the average number of common shares outstanding used to calculate basic earnings per common share and the average number of common shares and common share equivalents outstanding used to calculate diluted earnings per share during each of the 2024 and 2023 thirteen-week periods. 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 Information - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 30, 2024	Apr. 01, 2023
Supplemental Cash Flow Information [Abstract]
Income taxes paid		$ 895,000
Income tax refunds received	$ 495,000
Interest paid	825,000	$ 1,030,000
Right-of-use asset obtained in exchange for finance lease liability	$ 1,325,000

Debt	3 Months Ended
Mar. 30, 2024
Debt	(10) Debt Other than the finance lease obligations as presented on the consolidated balance sheets, the Company had no outstanding debt as of March 30, 2024 and December 30, 2023. On July 1, 2022, Landstar entered into a second amended and restated credit agreement with a bank syndicate led by JPMorgan Chase Bank, N.A., as administrative agent (the “Credit Agreement”). The Credit Agreement, which matures July 1, 2027, provides for borrowing capacity in the form of a revolving credit facility of $300,000,000, $45,000,000 of which may be utilized in the form of letters of credit. The Credit Agreement also includes an “accordion” feature providing for a possible increase of up to an aggregate amount of borrowing capacity of $600,000,000. As of March 30, 2024, the Company had no borrowings outstanding under 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 to 1 on a pro forma basis as of the end of the Company’s most recently completed fiscal quarter. The Credit Agreement provides for an event of default in the event that, among other things, a person or group acquires 35% or more of the outstanding capital stock of the Company or obtains power to elect a majority of the Company’s directors or the directors cease to consist of a majority of Continuing Directors, as defined in the Credit Agreement. None of these covenants are presently considered by management to be materially restrictive to the Company’s operations, capital resources or liquidity. The Company is currently in compliance with all of the debt covenants under the Credit Agreement. 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.

Debt

3 Months Ended

Mar. 30, 2024

Debt

(10) Debt

Other

than the finance lease obligations as presented on the consolidated balance sheets, the Company had no outstanding debt as of March 30, 2024 and December 30, 2023.

On July 1, 2022, Landstar entered into a second amended and restated credit agreement with a bank syndicate led by JPMorgan Chase Bank, N.A., as administrative agent (the “Credit Agreement”). The Credit Agreement, which matures July 1, 2027, provides for borrowing capacity in the form of a revolving credit facility of $300,000,000, $45,000,000 of which may be utilized in the form of letters of credit. The Credit Agreement also includes an “accordion” feature providing for a possible increase of up to an aggregate amount of borrowing capacity of $600,000,000. As of March 30, 2024, the Company had no borrowings outstanding under 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

to 1 on a pro forma basis as of the end of the Company’s most recently completed fiscal quarter. The Credit Agreement provides for an event of default in the event that, among other things, a person or group acquires 35% or more of the outstanding capital stock of the Company or obtains power to elect a majority of the Company’s directors or the directors cease to consist of a majority of Continuing Directors, as defined in the Credit Agreement. None of these covenants are presently considered by management to be materially restrictive to the Company’s operations, capital resources or liquidity. The Company is currently in compliance with all of the debt covenants under the Credit Agreement.

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.

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

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+ Details

Leases (Tables)

3 Months Ended

Mar. 30, 2024

Lease, Cost

The components of lease cost for finance leases and operating leases for the thirteen weeks ended March 30, 2024 were (in thousands):


Finance leases:
Amortization of right-of-use assets	$	4,079
Interest on lease liability		550

Total finance lease cost		4,629
Operating leases:
Lease cost		1,040
Variable lease cost		—
Sublease income		(1,407	)

Total net operating lease income		(367	)

Total net lease cost	$	4,262

Schedule Of Supplemental Balance Sheet Information Related To Leases

A summary of the lease classification on the Company’s consolidated balance sheet as of March 30, 2024 is as follows (in thousands):


Assets:
Operating lease right-of-use assets	Other assets	$	1,484
Finance lease assets	Operating property, less accumulated depreciation and amortization		97,244

Total lease assets		$	98,728

Finance And Operating Lease Maturity

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 March 30, 2024 (in thousands):


	Finance Leases		Operating Leases
2024 Remainder	$	22,254	$	629
2025		23,855		547
2026		15,752		213
2027		5,358		176
2028		1,256		49
Thereafter		51		—

Total future minimum lease payments		68,526		1,614
Less amount representing interest (1.6% to 6.5%)		3,300		130

Present value of minimum lease payments	$	65,226	$	1,484

Current maturities of long-term debt		26,730
Long-term debt, excluding current maturities		38,496
Other current liabilities				791
Deferred income taxes and other noncurrent liabilities				693

Schedule Discount Rate And Lease Term Used In Calculating Lease Liabilities And Assets

The weighted average remaining lease term and the weighted average discount rate for finance and operating leases as of March 30, 2024 were:


	Finance Leases			Operating Leases
Weighted average remaining lease term (years)		2.8			2.6
Weighted average discount rate		3.2	%		6.5	%

Investments - Additional Information (Detail) - USD ($)	3 Months Ended
Investments - Additional Information (Detail) - USD ($)	Mar. 30, 2024	Dec. 30, 2023
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	$ (5,954,000)	$ (6,382,000)

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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+ Details

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 30, 2024	Dec. 30, 2023
Allowance on trade accounts receivable	$ 11,764	$ 11,738
Allowance on other receivables	14,310	14,010
Accumulated depreciation and amortization on operating property	$ 442,898	$ 436,682
Common stock, par value	$ 0.01	$ 0.01
Common stock, authorized shares	160,000,000	160,000,000
Common stock, issued shares	68,547,553	68,497,324
Treasury stock, shares	32,785,515	32,780,651

Share-Based Payment Arrangements (Tables)

3 Months Ended

Mar. 30, 2024

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):


	Thirteen Weeks Ended
	March 30, 2024			April 1, 2023
Total cost of the Plans during the period	$	1,724		$	1,852
Amount of related income tax benefit recognized during the period		(1,152	)		(2,751	)

Net cost of the Plans during the period	$	572		$	(899	)

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 RSUs			Weighted Average Grant Date Fair Value
Outstanding at December 30, 2023		132,722		$	138.93
Granted		102,253		$	138.86
Vested shares		(36,249	)	$	131.10
Forfeited		(2,173	)	$	148.85

Outstanding at March 30, 2024		196,553		$	140.23

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 restricted stock and Deferred Stock Units (defined below) under the Plans:


	Number of Shares and Deferred Stock Units			Weighted Average Grant Date Fair Value
Non-vested at December 30, 2023		46,348		$	158.38
Granted		25,151		$	188.78
Vested		(16,169	)	$	152.07
Forfeited		(295	)	$	169.89

Non-vested at March 30, 2024		55,035		$	174.07

Share-Based Payment Arrangements

3 Months Ended

Mar. 30, 2024

Share-Based Payment Arrangements

(2) Share-based Payment Arrangements

As of March 30, 2024, 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”). 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. The 2011 EIP 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):


	Thirteen Weeks Ended
	March 30, 2024			April 1, 2023
Total cost of the Plans during the period	$	1,724		$	1,852
Amount of related income tax benefit recognized during the period		(1,152	)		(2,751	)

Net cost of the Plans during the period	$	572		$	(899	)

Included in income tax benefits recognized in the thirteen-week periods ended March 30, 2024 and April 1, 2023 were excess tax benefits from stock-based awards of $729,000 and $2,296,000, respectively.

As of March 30, 2024, there were 187,260 shares of the Company’s common stock reserved for issuance under the 2022 DSCP and 2,750,207 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 RSUs			Weighted Average Grant Date Fair Value
Outstanding at December 30, 2023		132,722		$	138.93
Granted		102,253		$	138.86
Vested shares		(36,249	)	$	131.10
Forfeited		(2,173	)	$	148.85

Outstanding at March 30, 2024		196,553		$	140.23

During the thirteen-week period ended March 30, 2024, the Company granted RSUs with a performance condition and RSUs with a market condition, as further described below. Outstanding RSUs at both December 30, 2023 and March 30, 2024 include RSUs with a performance condition and RSUs with a market condition, as further described below and in the Company’s 2023 Annual Report on Form

10-K.

RSUs with a performance condition granted on February 2, 2024 may vest on January 31 of 2027, 2028 and 2029 based on growth in operating income and pre-tax income per diluted share from continuing operations as compared to the results from the 2023 fiscal year.

On February 2, 2024, the Company granted 58,268 RSUs

that vest based on a market condition. These RSUs may vest based on the achievement of the target Company’s total shareholder return (“TSR”) compound annual growth rate, adjusted to reflect dividends (if any) paid during such periods and capital adjustments as may be necessary, and are eligible to vest annually starting after the sixth anniversary of the grant date and concluding after the tenth anniversary of the grant date. The fair value of this RSU award was determined at the time of grant based on the expected achievement of the market condition. With respect to these RSU awards, the Company reports compensation expense ratably over the service period of the award based on the number of units granted multiplied by the grant date fair value of the RSU. Previously recognized compensation cost would be reversed only if the employee did not complete the requisite service period due to termination of employment.

The Company recognized approximately $632,000 and $958,000 of share-based compensation expense related to RSU awards in the thirteen-week periods ended March 30, 2024 and April 1, 2023, respectively. As of March 30, 2024, there was a maximum of $49.3 million of total unrecognized compensation cost related to RSU awards granted under the Plans with an expected average remaining life of approximately 4.5 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 Restricted Stock and Deferred Stock Units

The following table summarizes information regarding the Company’s outstanding shares of non-vested restricted stock and Deferred Stock Units (defined below) under the Plans:


	Number of Shares and Deferred Stock Units			Weighted Average Grant Date Fair Value
Non-vested at December 30, 2023		46,348		$	158.38
Granted		25,151		$	188.78
Vested		(16,169	)	$	152.07
Forfeited		(295	)	$	169.89

Non-vested at March 30, 2024		55,035		$	174.07

The fair value of each share of non-vested restricted stock issued and Deferred Stock Unit granted under the Plans is based on the fair value of a share of the 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, in two equal annual installments on the first and second anniversary of the date of the grant or 100% on the first, third 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 the recipient’s separation from service from the Board of Directors, or, if earlier, upon a change in control event of the Company. Deferred Stock Units become vested 100% on the first anniversary of the date of the grant. Deferred Stock Units do not represent actual ownership in shares of the Company’s common stock and the recipient does not have voting rights or other incidents of ownership until the shares are issued. However, Deferred Stock Units do contain the right to receive dividend equivalent payments prior to settlement into shares.

As of March 30, 2024, there was $7,427,000 of total unrecognized compensation cost related to non-vested shares of restricted stock and Deferred Stock Units granted under the Plans. The unrecognized compensation cost related to these non-vested shares of restricted stock and Deferred Stock Units is expected to be recognized over a weighted average period of 2.2 years.

Stock Options

The Company had no remaining issued and outstanding vested or unvested stock options or unrecognized compensation costs related to non-vested stock options granted under the Plans as of December 30, 2023 and March 30, 2024. The total intrinsic value of stock options exercised during the thirteen-week period ended April 1, 2023 was $218,000.

Recent Accounting Pronouncements

3 Months Ended

Mar. 30, 2024

Recent Accounting Pronouncements

(12) Recent Accounting Pronouncements

Accounting Standards Issued But Not Yet Adopted

In November 2023, the FASB issued ASU 2023-07,

Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures

(“ASU 2023-07”), which expands disclosures about a public entity’s reportable segments and requires more enhanced information about a reportable segment’s expenses, interim segment profit or loss, and how a public entity’s chief operating decision maker uses reported segment profit or loss information in assessing segment performance and allocating resources. ASU 2023-07 is effective for annual periods beginning after December 15, 2023. The Company is currently evaluating the impact of ASU 2023-07 on its consolidated financial statements and related disclosures.

In December 2023, the FASB issued ASU 2023-09,

Income Taxes (Topic 740): Improvements to Income Tax Disclosures

(“ASU 2023-09”), which expands disclosures in an entity’s income tax rate reconciliation table and regarding cash taxes paid both in the U.S. and foreign jurisdictions. ASU 2023-09 is effective for annual periods beginning after December 15, 2024. ASU 2023-09 is not expected to have a material impact on the Company’s consolidated financial statements and related disclosures.

- Definition

The entire disclosure for change in accounting principle. Includes, but is not limited to, nature, reason, and method of adopting amendment to accounting standards or other change in accounting principle.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
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+ Details

Share-Based Payment Arrangements - Additional Information (Detail) - USD ($)		3 Months Ended
	Feb. 02, 2024	Mar. 30, 2024	Apr. 01, 2023	Dec. 30, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Excess tax benefit from stock-based awards		$ 729,000	$ 2,296,000
Stock awards granted, shares	58,268
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number		0
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards granted, shares		102,253
Recognized share-based compensation expense		$ 632,000	958,000
Unrecognized compensation cost, other than options		$ 49,300,000
Unrecognized compensation cost expected to be recognized over period, years		4 years 6 months
Non Vested Restricted Stock and Deferred Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards granted, shares		25,151
Unrecognized compensation cost, other than options		$ 7,427,000
Unrecognized compensation cost expected to be recognized over period, years		2 years 2 months 12 days
Terms of award		the 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, in two equal annual installments on the first and second anniversary of the date of the grant or 100% on the first, third 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 the recipient’s separation
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total intrinsic value of stock options exercised during periods			$ 218,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number		0		0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number		0		0
Maximum \| Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum percentage of target available for common share issuance		100.00%
2011 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock authorized for issuance		6,000,000
Common stock reserved for issuance		2,750,207
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		187,260
2022 Directors Stock Compensation Plan \| Deferred Stock Unit
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock vesting percentage		100.00%

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended
Pay vs Performance Disclosure - USD ($) $ in Thousands	Mar. 30, 2024	Apr. 01, 2023
Pay vs Performance Disclosure
Net Income (Loss)	$ 47,096	$ 78,195

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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-URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2

Reference 39: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(22))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483589/942-220-S99-1

+ Details

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2024	Apr. 01, 2023
OPERATING ACTIVITIES
Net income	$ 47,096	$ 78,195
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	14,142	15,198
Non-cash interest charges	66	66
Provisions for losses on trade and other accounts receivable	3,854	3,199
Gains on sales/disposals of operating property	(248)	(1,140)
Deferred income taxes, net	(1,259)	758
Stock-based compensation	1,724	1,852
Changes in operating assets and liabilities:
Decrease in trade and other accounts receivable	18,871	67,776
Decrease in other assets	11,574	8,625
Decrease in accounts payable	(11,713)	(37,068)
Increase in other liabilities	10,497	2,640
Decrease in insurance claims	(396)	(1,066)
NET CASH PROVIDED BY OPERATING ACTIVITIES	94,208	139,035
INVESTING ACTIVITIES
Sales and maturities of investments	19,923	40,349
Purchases of investments	(15,869)	(31,425)
Purchases of operating property	(9,281)	(6,233)
Proceeds from sales of operating property	1,585	1,645
NET CASH (USED) PROVIDED BY INVESTING ACTIVITIES	(3,642)	4,336
FINANCING ACTIVITIES
Decrease in cash overdraft	(9,867)	(26,758)
Dividends paid	(83,235)	(82,660)
Proceeds from exercises of stock options	0	28
Taxes paid in lieu of shares issued related to stock-based compensation plans	(3,060)	(8,236)
Purchases of common stock	0	(15,433)
Principal payments on finance lease obligations	(7,239)	(9,408)
NET CASH USED BY FINANCING ACTIVITIES	(103,401)	(142,467)
Effect of exchange rate changes on cash and cash equivalents	(537)	502
(Decrease) increase in cash and cash equivalents	(13,372)	1,406
Cash and cash equivalents at beginning of period	481,043	339,581
Cash and cash equivalents at end of period	$ 467,671	$ 340,987

Schedule of Information on Restricted Stock Units (Detail) - $ / shares		3 Months Ended
	Feb. 02, 2024	Mar. 30, 2024
Number of Shares
Granted	58,268
Restricted Stock Units (RSUs)
Number of Shares
Beginning Balance		132,722
Granted		102,253
Vested shares		(36,249)
Forfeited		(2,173)
Ending Balance		196,553
Weighted Average Grant Date Fair Value
Beginning Balance		$ 138.93
Granted		138.86
Vested shares		131.1
Forfeited		148.85
Ending Balance		$ 140.23

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 30, 2024	Dec. 30, 2023
Current Assets
Cash and cash equivalents	$ 467,671	$ 481,043
Short-term investments	62,781	59,661
Trade accounts receivable, less allowance of $11,764 and $11,738	723,841	743,762
Other receivables, including advances to independent contractors, less allowance of $14,310 and $14,010	40,535	43,339
Other current assets	15,540	24,936
Total current assets	1,310,368	1,352,741
Operating property, less accumulated depreciation and amortization of $442,898 and $436,682	279,552	284,300
Goodwill	42,381	42,275
Other assets	113,540	122,530
Total assets	1,745,841	1,801,846
Current Liabilities
Cash overdraft	51,674	61,541
Accounts payable	384,267	395,980
Current maturities of long-term debt	26,730	27,876
Insurance claims	40,683	41,825
Dividends payable	0	71,433
Other current liabilities	86,318	76,569
Total current liabilities	589,672	675,224
Long-term debt, excluding current maturities	38,496	43,264
Insurance claims	59,668	58,922
Deferred income taxes and other noncurrent liabilities	40,094	40,513
Shareholders' Equity
Common stock, $0.01 par value, authorized 160,000,000 shares, issued 68,547,553 and 68,497,324 shares	685	685
Additional paid-in capital	254,192	254,642
Retained earnings	2,818,939	2,783,645
Cost of 32,785,515 and 32,780,651 shares of common stock in treasury	(2,049,070)	(2,048,184)
Accumulated other comprehensive loss	(6,835)	(6,865)
Total shareholders' equity	1,017,911	983,923
Total liabilities and shareholders' equity	$ 1,745,841	$ 1,801,846

Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended
Consolidated Statements of Income - USD ($) $ in Thousands	Mar. 30, 2024	Apr. 01, 2023
Revenue	$ 1,171,043	$ 1,435,675
Investment income	3,412	1,368
Costs and expenses:
Purchased transportation	905,521	1,101,294
Commissions to agents	97,282	125,675
Other operating costs, net of gains on asset sales/dispositions	14,859	12,378
Insurance and claims	26,268	27,647
Selling, general and administrative	56,422	53,567
Depreciation and amortization	14,142	15,198
Total costs and expenses	1,114,494	1,335,759
Operating income	59,961	101,284
Interest and debt (income) expense	(1,611)	(726)
Income before income taxes	61,572	102,010
Income taxes	14,476	23,815
Net income	$ 47,096	$ 78,195
Basic earnings per share	$ 1.32	$ 2.17
Diluted earnings per share	$ 1.32	$ 2.17
Average basic shares outstanding	35,750,000	35,982,000
Average diluted shares outstanding	35,750,000	35,982,000
Dividends per common share	$ 0.33	$ 0.3

Leases

3 Months Ended

Mar. 30, 2024

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 assets and operating lease liabilities represent leases for facilities maintained in support of the Company’s network of BCO Independent Contractors and office space used to conduct Landstar’s business. These leases do not have significant rent escalation holidays, concessions, leasehold improvement incentives or other build-out clauses. Further, the leases do not contain contingent rent provisions. Landstar also rents certain trailing equipment to supplement the Company-owned trailer fleet under “month-to-month” lease terms, which are not required to be recorded on the balance sheet due to the less than twelve month lease term exemption. Sublease income is primarily comprised of weekly trailing equipment rentals to BCO Independent Contractors.

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 assets and lease liabilities as they are not reasonably certain of exercise. Landstar regularly evaluates the renewal options, and when they are reasonably certain of exercise, Landstar includes the renewal period in the lease term.

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 thirteen weeks ended March 30, 2024 were (in thousands):


Finance leases:
Amortization of right-of-use assets	$	4,079
Interest on lease liability		550

Total finance lease cost		4,629
Operating leases:
Lease cost		1,040
Variable lease cost		—
Sublease income		(1,407	)

Total net operating lease income		(367	)

Total net lease cost	$	4,262

A summary of the lease classification on the Company’s consolidated balance sheet as of March 30, 2024 is as follows (in thousands):


Assets:
Operating lease right-of-use assets	Other assets	$	1,484
Finance lease assets	Operating property, less accumulated depreciation and amortization		97,244

Total lease assets		$	98,728

Liabilities:


	Finance Leases		Operating Leases
2024 Remainder	$	22,254	$	629
2025		23,855		547
2026		15,752		213
2027		5,358		176
2028		1,256		49
Thereafter		51		—

Total future minimum lease payments		68,526		1,614
Less amount representing interest (1.6% to 6.5%)		3,300		130

Present value of minimum lease payments	$	65,226	$	1,484

Current maturities of long-term debt		26,730
Long-term debt, excluding current maturities		38,496
Other current liabilities				791
Deferred income taxes and other noncurrent liabilities				693

The weighted average remaining lease term and the weighted average discount rate for finance and operating leases as of March 30, 2024 were:


	Finance Leases			Operating Leases
Weighted average remaining lease term (years)		2.8			2.6
Weighted average discount rate		3.2	%		6.5	%

Consolidated Statements of Changes in Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 30, 2024	Apr. 01, 2023
Dividends per common share	$ 0.33	$ 0.3

Investments (Tables)

3 Months Ended

Mar. 30, 2024

Amortized Cost and Fair Value of Available-for-Sale Investments

The amortized cost and fair values of available-for-sale investments are as follows at March 30, 2024 and December 30, 2023 (in thousands):


	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
March 30, 2024
Money market investments	$	8,303	$	—	$	—	$	8,303
Asset-backed securities		18,019		2		2,062		15,959
Corporate bonds and direct obligations of government agencies		123,879		143		4,012		120,010
U.S. Treasury obligations		3,832		—		25		3,807

Total	$	154,033	$	145	$	6,099	$	148,079

December 30, 2023
Money market investments	$	16,832	$	—	$	—	$	16,832
Asset-backed securities		16,543		—		2,236		14,307
Corporate bonds and direct obligations of government agencies		118,481		279		4,384		114,376
U.S. Treasury obligations		6,287		2		43		6,246

Total	$	158,143	$	281	$	6,663	$	151,761

Schedule of Unrealized Loss on Available-for-Sale Investments

For those

available-for-sale

investments with unrealized losses at March 30, 2024 and December 30, 2023, the following table summarizes the duration of the unrealized loss (in thousands):


	Less than 12 months				12 months or longer				Total
	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss

March 30, 2024
Asset-backed securities	$	—	$	—	$	13,975	$	2,062	$	13,975	$	2,062
Corporate bonds and direct obligations of government agencies		22,850		135		82,114		3,877		104,964		4,012
U.S. Treasury obligations		—		—		2,323		25		2,323		25

Total	$	22,850	$	135	$	98,412	$	5,964	$	121,262	$	6,099

December 30, 2023
Asset-backed securities	$	—	$	—	$	14,307	$	2,236	$	14,307	$	2,236
Corporate bonds and direct obligations of government agencies		3,506		42		86,841		4,342		90,347		4,384
U.S. Treasury obligations		—		—		2,305		43		2,305		43

Total	$	3,506	$	42	$	103,453	$	6,621	$	106,959	$	6,663

Investments

3 Months Ended

Mar. 30, 2024

Investments

(8) Investments

Investments include primarily investment-grade corporate bonds, asset-backed securities and U.S. treasury obligations 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

and are carried at fair value. Investments maturing less than one year from the balance sheet date are included in short-term investments and investments maturing more than one year from the balance sheet date are included in other assets in the consolidated balance sheets. Management performs an analysis of the nature of the unrealized losses on

available-for-sale

investments to determine whether an allowance for credit loss is necessary. Unrealized losses, representing the excess of the purchase price of an investment over its fair value as of the end of a period, considered to be a result of credit-related factors, are to be included as a charge in the statement of income, while unrealized losses considered to be a result of

non-credit-related

factors are to be included as a component of shareholders’ equity. Investments whose values are based on quoted market prices in active markets are classified within Level 1. Investments that trade in markets that are not considered to be active, but are valued based on quoted market prices, are classified within Level 2. As Level 2 investments include positions that are not traded in active markets, valuations may be adjusted to reflect illiquidity and/or

non-transferability,

which are generally based on available market information. Any transfers between levels are recognized as of the beginning of any reporting period. Fair value of the bond portfolio was determined using Level 1 inputs related to U.S. Treasury obligations and money market investments and Level 2 inputs related to investment-grade corporate bonds, asset-backed securities and direct obligations of government agencies. Unrealized losses, net of unrealized gains, on the investments in the bond portfolio

were $5,954,000 and $6,382,000 at March 30, 2024 and December 30, 2023, respectively.

The amortized cost and fair values of available-for-sale investments are as follows at March 30, 2024 and December 30, 2023 (in thousands):


	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
March 30, 2024
Money market investments	$	8,303	$	—	$	—	$	8,303
Asset-backed securities		18,019		2		2,062		15,959
Corporate bonds and direct obligations of government agencies		123,879		143		4,012		120,010
U.S. Treasury obligations		3,832		—		25		3,807

Total	$	154,033	$	145	$	6,099	$	148,079

December 30, 2023
Money market investments	$	16,832	$	—	$	—	$	16,832
Asset-backed securities		16,543		—		2,236		14,307
Corporate bonds and direct obligations of government agencies		118,481		279		4,384		114,376
U.S. Treasury obligations		6,287		2		43		6,246

Total	$	158,143	$	281	$	6,663	$	151,761

For those

available-for-sale

investments with unrealized losses at March 30, 2024 and December 30, 2023, the following table summarizes the duration of the unrealized loss (in thousands):


	Less than 12 months				12 months or longer				Total
	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss

March 30, 2024
Asset-backed securities	$	—	$	—	$	13,975	$	2,062	$	13,975	$	2,062
Corporate bonds and direct obligations of government agencies		22,850		135		82,114		3,877		104,964		4,012
U.S. Treasury obligations		—		—		2,323		25		2,323		25

Total	$	22,850	$	135	$	98,412	$	5,964	$	121,262	$	6,099

December 30, 2023
Asset-backed securities	$	—	$	—	$	14,307	$	2,236	$	14,307	$	2,236
Corporate bonds and direct obligations of government agencies		3,506		42		86,841		4,342		90,347		4,384
U.S. Treasury obligations		—		—		2,305		43		2,305		43

Total	$	3,506	$	42	$	103,453	$	6,621	$	106,959	$	6,663

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.

Segment Information - Additional Information (Detail) - Customer	3 Months Ended
	Mar. 30, 2024	Apr. 01, 2023
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	10.00%	10.00%

Leases - Undiscounted Cash Flows for the Finance and Operating Leases (Parenthetical) (Detail)	Mar. 30, 2024
Maximum
Finance lease Interest rate percentage	6.50%
Minimum
Finance lease Interest rate percentage	1.60%

Information Regarding Reportable Business Segments (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2024	Apr. 01, 2023	Dec. 30, 2023
Segment Reporting Information [Line Items]
Revenue	$ 1,171,043	$ 1,435,675
Investment income	3,412	1,368
Operating income	59,961	101,284
Expenditures on long-lived assets	9,281	6,233
Goodwill	42,381	41,726	$ 42,275
Related Party
Segment Reporting Information [Line Items]
Revenue	12,069	11,961
Transportation Logistics
Segment Reporting Information [Line Items]
Revenue	1,154,532	1,416,846
Operating income	42,681	86,162
Expenditures on long-lived assets	9,281	6,233
Goodwill	42,381	41,726
Insurance
Segment Reporting Information [Line Items]
Revenue	16,511	18,829
Investment income	3,412	1,368
Operating income	17,280	15,122
Insurance \| Related Party
Segment Reporting Information [Line Items]
Revenue	$ 12,069	$ 11,961

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References + Details

- Definition

Amount of operating interest income, including, but not limited to, amortization and accretion of premiums and discounts on securities.

+ References + Details

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

+ Details

Amounts Recognized in Financial Statements with Respect to Plans (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2024	Apr. 01, 2023
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total cost of the Plans during the period	$ 1,724	$ 1,852
Amount of related income tax benefit recognized during the period	(1,152)	(2,751)
Net cost of the Plans during the period	$ 572	$ (899)

Segment Information (Tables)

3 Months Ended

Mar. 30, 2024

Information Regarding Reportable Business Segments

The following table summarizes information about the Company’s reportable business segments as of and for the thirteen-week periods ended March 30, 2024 and April 1, 2023 (in thousands):


	Thirteen Weeks Ended
	March 30, 2024						April 1, 2023
	Transportation Logistics		Insurance		Total		Transportation Logistics		Insurance		Total
External revenue	$	1,154,532	$	16,511	$	1,171,043	$	1,416,846	$	18,829	$	1,435,675
Internal revenue				12,069		12,069				11,961		11,961
Investment income				3,412		3,412				1,368		1,368
Operating income		42,681		17,280		59,961		86,162		15,122		101,284
Expenditures on long-lived assets		9,281				9,281		6,233				6,233
Goodwill		42,381				42,381		41,726				41,726

Leases - Undiscounted Cash Flows for the Finance and Operating Leases (Detail) - USD ($) $ in Thousands	Mar. 30, 2024	Dec. 30, 2023
Operating Leased Assets [Line Items]
2024 Remainder	$ 22,254
2025	23,855
2026	15,752
2027	5,358
2028	1,256
Thereafter	51
Total future minimum lease payments	68,526
Less amount representing interest (1.6% to 6.5%)	3,300
Present value of minimum lease payments	65,226
Current maturities of long-term debt	26,730	$ 27,876
Long-term debt, excluding current maturities	38,496	$ 43,264
2024 Remainder	629
2025	547
2026	213
2027	176
2028	49
Thereafter	0
Total future minimum lease payments	1,614
Less amount representing interest (1.6% to 6.5%)	130
Present value of minimum lease payments	1,484
Operating lease, liability, current	$ 791
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Other Liabilities, Current
Operating lease, liability, non-current	$ 693
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Deferred Income Taxes and Other Liabilities, Noncurrent

Other Comprehensive Income - Components of and Changes in Accumulated Other Comprehensive (loss) Income, Net of Related Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2024	Apr. 01, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ 983,923
Other comprehensive income (loss)	30	$ 2,831
Ending Balance	1,017,911
Unrealized Holding (Losses) Gains on Available-for-Sale Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(5,010)
Other comprehensive income (loss)	336
Ending Balance	(4,674)
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(1,855)
Other comprehensive income (loss)	(306)
Ending Balance	(2,161)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(6,865)
Other comprehensive income (loss)	30
Ending Balance	$ (6,835)

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References + Details

- Definition

Amount of equity (deficit) attributable to parent. Excludes temporary equity and equity attributable to noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
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-Section 55
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(30))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

Reference 14: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 4.E)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480418/310-10-S99-2

+ Details

Additional Cash Flow Information

3 Months Ended

Mar. 30, 2024

Additional Cash Flow Information

(5) Additional Cash Flow Information

During the 2024 thirteen-week period, Landstar received income tax refunds, net of income tax payments, of $495,000 and paid interest of $825,000. During the 2023 thirteen-week period, Landstar paid income taxes and interest of $895,000 and $1,030,000, respectively. Landstar acquired operating property by entering into finance leases in the amount of $1,325,000 in the 2024 thirteen-week period. Landstar did not acquire any operating property by entering into finance leases in the 2023 thirteen-week period.

Income Taxes - Additional Information (Detail)	3 Months Ended
Income Taxes - Additional Information (Detail)	Mar. 30, 2024	Apr. 01, 2023
Income Taxes [Line Items]
Corporate income tax rate	21.00%	21.00%
Estimated annual effective income tax rate	24.50%	24.40%
Effective income tax rate	23.50%	23.30%

Significant Accounting Policies (Policies)

3 Months Ended

Mar. 30, 2024

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 thirteen-week periods ended March 30, 2024 and April 1, 2023 (dollars in thousands):


	Thirteen Weeks Ended
	March 30, 2024			April 1, 2023
Mode
Truck – BCO Independent Contractors		39	%		36	%
Truck – Truck Brokerage Carriers		53	%		56	%
Rail intermodal		2	%		2	%
Ocean and air cargo carriers		5	%		4	%
Truck Equipment Type
Van equipment	$	628,304		$	755,083
Unsided/platform equipment	$	343,045		$	377,564
Less-than-truckload	$	25,617		$	31,558
Other truck transportation (1)	$	71,966		$	159,503

(1)

- Definition

Disclosure of accounting policy for revenue from contract with customer.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-17

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 19
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-19

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-18

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-18

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 20
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-20

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 20
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-20

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 20
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-20

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 20
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-URI https://asc.fasb.org//1943274/2147479806/606-10-50-20

Reference 9: http://www.xbrl.org/2003/role/exampleRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (e)
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-Topic 235
-Publisher FASB
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Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Topic 606
-Publisher FASB
-URI https://asc.fasb.org//606/tableOfContent

+ Details

Amortized Cost and Fair Value of Available-for-Sale Investments (Detail) - USD ($) $ in Thousands	Mar. 30, 2024	Dec. 30, 2023
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 154,033	$ 158,143
Gross Unrealized Gains	145	281
Gross Unrealized Losses	6,099	6,663
Fair Value	148,079	151,761
Money market investments
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	8,303	16,832
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	8,303	16,832
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	18,019	16,543
Gross Unrealized Gains	2	0
Gross Unrealized Losses	2,062	2,236
Fair Value	15,959	14,307
Corporate bonds and direct obligations of government agencies
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	123,879	118,481
Gross Unrealized Gains	143	279
Gross Unrealized Losses	4,012	4,384
Fair Value	120,010	114,376
U.S. Treasury obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	3,832	6,287
Gross Unrealized Gains	0	2
Gross Unrealized Losses	25	43
Fair Value	$ 3,807	$ 6,246

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

Earnings Per Share - Additional Information (Detail)	Mar. 30, 2024 shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	0

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. 31, 2022		68,382,310			32,455,300
Beginning Balance at Dec. 31, 2022	$ 887,221	$ 684	$ 258,487	$ 2,635,960	$ (1,992,886)	$ (15,024)
Net income	78,195			78,195
Dividends	(10,806)			(10,806)
Purchases of common stock (in shares)					89,661
Purchases of common stock	(15,433)				$ (15,433)
Issuance of stock related to stock-based compensation plans (in shares)		101,653			5,891
Issuance of stock related to stock-based compensation plans	(8,208)	$ 1	(7,201)		$ (1,008)
Stock-based compensation	1,852		1,852
Other comprehensive income	2,831					2,831
Ending Balance (in shares) at Apr. 01, 2023		68,483,963			32,550,852
Ending Balance at Apr. 01, 2023	935,652	$ 685	253,138	2,703,349	$ (2,009,327)	(12,193)
Beginning Balance (in shares) at Dec. 30, 2023		68,497,324			32,780,651
Beginning Balance at Dec. 30, 2023	983,923	$ 685	254,642	2,783,645	$ (2,048,184)	(6,865)
Net income	47,096			47,096
Dividends	(11,802)			(11,802)
Issuance of stock related to stock-based compensation plans (in shares)		50,229			4,864
Issuance of stock related to stock-based compensation plans	(3,060)		(2,174)		$ (886)
Stock-based compensation	1,724		1,724
Other comprehensive income	30					30
Ending Balance (in shares) at Mar. 30, 2024		68,547,553			32,785,515
Ending Balance at Mar. 30, 2024	$ 1,017,911	$ 685	$ 254,192	$ 2,818,939	$ (2,049,070)	$ (6,835)

Debt - Additional Information (Detail) - USD ($)		3 Months Ended
Debt - Additional Information (Detail) - USD ($)	Jul. 01, 2022	Mar. 30, 2024	Dec. 30, 2023
Debt Instrument [Line Items]
Debt Outstanding Excluding Capital Lease Obligations		$ 0	$ 0
Revolving Credit Facility
Debt Instrument [Line Items]
Debt Outstanding Excluding Capital Lease Obligations		$ 0
Credit facility, initiation date	Jul. 01, 2022
Credit facility, borrowing capacity	$ 45,000,000
Credit facility, maximum borrowing capacity	$ 600,000,000
Credit facility, debt covenants compliance		The Company is currently in compliance with all of the debt covenants under the Credit Agreement.
Additional overnight secured financing rate	0.10%
Revolving Credit Facility \| Minimum
Debt Instrument [Line Items]
Credit facility, unused credit commitment fee		0.20%
Credit facility event of default, minimum percentage that a person or group should acquire outstanding capital stock		35.00%
Revolving Credit Facility \| Minimum \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument [Line Items]
Borrowings, basis spread on variable rate		1.25%
Revolving Credit Facility \| Minimum \| Base Rate
Debt Instrument [Line Items]
Borrowings, basis spread on variable rate		0.25%
Revolving Credit Facility \| Maximum
Debt Instrument [Line Items]
Credit facility, borrowing capacity	$ 300,000,000
Credit facility, unused credit commitment fee		0.30%
Maximum Leverage ratio beyond which amount of cash dividends and other distributions to stockholders is limited		250.00%
Revolving Credit Facility \| Maximum \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument [Line Items]
Borrowings, basis spread on variable rate		2.00%
Revolving Credit Facility \| Maximum \| Base Rate
Debt Instrument [Line Items]
Borrowings, basis spread on variable rate		1.00%

Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2024	Apr. 01, 2023
Unrealized holding gains on available-for-sale, investments, net of tax expense	$ 92	$ 306

Leases - Weighted Average Remaining Lease Term and the Weighted Average Discount Rate for Finance and Operating leases (Detail)	Mar. 30, 2024
Weighted average remaining lease term (years)	2 years 9 months 18 days
Weighted average discount rate	3.20%
Weighted average remaining lease term (years)	2 years 7 months 6 days
Weighted average discount rate	6.50%

Significant Accounting Policies (Tables)

3 Months Ended

Mar. 30, 2024

Schedule of Disaggregation of Revenue


	Thirteen Weeks Ended
	March 30, 2024			April 1, 2023
Mode
Truck – BCO Independent Contractors		39	%		36	%
Truck – Truck Brokerage Carriers		53	%		56	%
Rail intermodal		2	%		2	%
Ocean and air cargo carriers		5	%		4	%
Truck Equipment Type
Van equipment	$	628,304		$	755,083
Unsided/platform equipment	$	343,045		$	377,564
Less-than-truckload	$	25,617		$	31,558
Other truck transportation (1)	$	71,966		$	159,503

(1)

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2024	Apr. 01, 2023
Net income	$ 47,096	$ 78,195
Other comprehensive income (loss):
Unrealized holding gains on available-for-sale investments, net of tax expense of $92 and $306	336	1,120
Foreign currency translation (losses) gains	(306)	1,711
Other comprehensive income	30	2,831
Comprehensive income	$ 47,126	$ 81,026

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

+ Details

Schedule of Unrealized Loss on Available-for-Sale Investments (Detail) - USD ($) $ in Thousands	Mar. 30, 2024	Dec. 30, 2023
Debt Securities, Available-for-sale [Line Items]
Available-for-sale investments with unrealized losses, Less than 12 months, Fair Value	$ 22,850	$ 3,506
Available-for-sale investments with unrealized losses, Less than 12 months, Unrealized Loss	135	42
Available-for-sale investments with unrealized losses, 12 months or longer, Fair Value	98,412	103,453
Available-for-sale investments with unrealized losses, 12 months or longer, Unrealized Loss	5,964	6,621
Available-for-sale investments with unrealized losses, Fair Value, Total	121,262	106,959
Available-for-sale investments with unrealized losses, Unrealized Loss, Total	6,099	6,663
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Available-for-sale investments with unrealized losses, Less than 12 months, Fair Value	0	0
Available-for-sale investments with unrealized losses, Less than 12 months, Unrealized Loss	0	0
Available-for-sale investments with unrealized losses, 12 months or longer, Fair Value	13,975	14,307
Available-for-sale investments with unrealized losses, 12 months or longer, Unrealized Loss	2,062	2,236
Available-for-sale investments with unrealized losses, Fair Value, Total	13,975	14,307
Available-for-sale investments with unrealized losses, Unrealized Loss, Total	2,062	2,236
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	22,850	3,506
Available-for-sale investments with unrealized losses, Less than 12 months, Unrealized Loss	135	42
Available-for-sale investments with unrealized losses, 12 months or longer, Fair Value	82,114	86,841
Available-for-sale investments with unrealized losses, 12 months or longer, Unrealized Loss	3,877	4,342
Available-for-sale investments with unrealized losses, Fair Value, Total	104,964	90,347
Available-for-sale investments with unrealized losses, Unrealized Loss, Total	4,012	4,384
U.S. Treasury obligations
Debt Securities, Available-for-sale [Line Items]
Available-for-sale investments with unrealized losses, Less than 12 months, Fair Value	0	0
Available-for-sale investments with unrealized losses, Less than 12 months, Unrealized Loss	0	0
Available-for-sale investments with unrealized losses, 12 months or longer, Fair Value	2,323	2,305
Available-for-sale investments with unrealized losses, 12 months or longer, Unrealized Loss	25	43
Available-for-sale investments with unrealized losses, Fair Value, Total	2,323	2,305
Available-for-sale investments with unrealized losses, Unrealized Loss, Total	$ 25	$ 43

Significant Accounting Policies

3 Months Ended

Mar. 30, 2024

Significant Accounting Policies

(1) Significant Accounting Policies

Revenue from Contracts with Customers – Disaggregation of Revenue


	Thirteen Weeks Ended
	March 30, 2024			April 1, 2023
Mode
Truck – BCO Independent Contractors		39	%		36	%
Truck – Truck Brokerage Carriers		53	%		56	%
Rail intermodal		2	%		2	%
Ocean and air cargo carriers		5	%		4	%
Truck Equipment Type
Van equipment	$	628,304		$	755,083
Unsided/platform equipment	$	343,045		$	377,564
Less-than-truckload	$	25,617		$	31,558
Other truck transportation (1)	$	71,966		$	159,503

(1)

Segment Information

3 Months Ended

Mar. 30, 2024

Segment Information

(6) Segment Information

The following table summarizes information about the Company’s reportable business segments as of and for the thirteen-week periods ended March 30, 2024 and April 1, 2023 (in thousands):


	Thirteen Weeks Ended
	March 30, 2024						April 1, 2023
	Transportation Logistics		Insurance		Total		Transportation Logistics		Insurance		Total
External revenue	$	1,154,532	$	16,511	$	1,171,043	$	1,416,846	$	18,829	$	1,435,675
Internal revenue				12,069		12,069				11,961		11,961
Investment income				3,412		3,412				1,368		1,368
Operating income		42,681		17,280		59,961		86,162		15,122		101,284
Expenditures on long-lived assets		9,281				9,281		6,233				6,233
Goodwill		42,381				42,381		41,726				41,726

In the thirteen-week periods ended March 30, 2024 and April 1, 2023, no single customer accounted for more than 10% of the Company’s consolidated revenue.

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-22

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 15
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-15

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 31
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-31

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 32
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-32

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-42

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
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-Paragraph 32
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-32

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
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-Name Accounting Standards Codification
-Section 50
-Paragraph 40
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-40

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org//280/tableOfContent

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 26
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-26

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
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-Name Accounting Standards Codification
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-Paragraph 34
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-34

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-41

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
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-Name Accounting Standards Codification
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-21

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
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-Section 50
-Paragraph 21
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-21

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 32
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-32

+ Details

Leases - Components of Lease Cost for Finance Leases and Operating Leases (Detail) $ in Thousands	3 Months Ended
	Mar. 30, 2024 USD ($)
Finance leases:
Amortization of right-of-use assets	$ 4,079
Interest on lease liability	550
Total finance lease cost	4,629
Operating leases:
Lease cost	1,040
Variable lease cost	0
Sublease income	(1,407)
Total net operating lease income	(367)
Total net lease cost	$ 4,262

Leases - Classification on our Consolidated Balance Sheet (Detail) $ in Thousands	Mar. 30, 2024 USD ($)
Operating lease right-of-use assets	$ 1,484
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other Assets, Noncurrent
Finance lease assets	$ 97,244
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Property, Plant and Equipment, Net
Total lease assets	$ 98,728

Other Comprehensive Income (Tables)

3 Months Ended

Mar. 30, 2024

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 (loss) income, net of related income taxes, as of and for the thirteen-week period ended March 30, 2024 (in thousands):


	Unrealized Holding (Losses) Gains on Available-for-Sale Securities			Foreign Currency Translation			Total
Balance as of December 30, 2023	$	(5,010	)	$	(1,855	)	$	(6,865	)
Other comprehensive income (loss)		336			(306	)		30

Balance as of March 30, 2024	$	(4,674	)	$	(2,161	)	$	(6,835	)

Commitments and Contingencies - Additional Information (Detail)	Mar. 30, 2024 USD ($)
Current Investments \| Collateral Pledged
Commitments and Contingencies Disclosure [Line Items]
Investments providing collateral for letters of credit to guarantee insurance claims	$ 62,781,000
Non-Current Investments
Commitments and Contingencies Disclosure [Line Items]
Total non-current investments	85,298,000
Non-Current Investments \| Collateral Pledged
Commitments and Contingencies Disclosure [Line Items]
Investments providing collateral for letters of credit to guarantee insurance claims	22,834,000
Revolving Credit Facility
Commitments and Contingencies Disclosure [Line Items]
Letters of credit outstanding	33,492,000
Guarantee Payment of Insurance Claims
Commitments and Contingencies Disclosure [Line Items]
Letters of credit outstanding	$ 77,054,000

Commitments and Contingencies

3 Months Ended

Mar. 30, 2024

Commitments and Contingencies

(11) Commitments and Contingencies

Short-term investments include $62,781,000 in current maturities of investments held by the Company’s insurance segment at March 30, 2024. The non-current portion of the bond portfolio of $85,298,000 is included in other assets. The short-term investments, together with $22,834,000 of non-current investments, provide collateral for the $77,054,000 of letters of credit issued to guarantee payment of insurance claims. As of March 30, 2024, Landstar also had $33,492,000 of additional letters of credit outstanding under the Company’s Credit Agreement.

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.

Leases - Additional Information (Detail)	Mar. 30, 2024 USD ($)
Leases Disclosure [Line Items]
Finance Lease Option to Purchase Option Value	$ 1
Lessee, Finance Lease, Term of Contract	5 years

Other Comprehensive Income

3 Months Ended

Mar. 30, 2024

Other Comprehensive Income

(7) Other Comprehensive Income


	Unrealized Holding (Losses) Gains on Available-for-Sale Securities			Foreign Currency Translation			Total
Balance as of December 30, 2023	$	(5,010	)	$	(1,855	)	$	(6,865	)
Other comprehensive income (loss)		336			(306	)		30

Balance as of March 30, 2024	$	(4,674	)	$	(2,161	)	$	(6,835	)

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 thirteen-week period

ended March 30, 2024.

Schedule of Information on Non - Vested Restricted Stock Units (Detail) - $ / shares		3 Months Ended
	Feb. 02, 2024	Mar. 30, 2024
Number of Shares and Deferred Stock Units
Granted	58,268
Non Vested Restricted Stock and Deferred Stock Units
Number of Shares and Deferred Stock Units
Beginning Balance		46,348
Granted		25,151
Vested		(16,169)
Forfeited		(295)
Ending Balance		55,035
Weighted Average Grant Date Fair Value
Beginning Balance		$ 158.38
Granted		188.78
Vested		152.07
Forfeited		169.89
Ending Balance		$ 174.07

Income Taxes

3 Months Ended

Mar. 30, 2024

Income Taxes

(3) Income Taxes

The provisions for income taxes for the 2024 and 2023 thirteen-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 effective income tax rate for the 2024 thirteen-week period was 23.5%. The effective income tax rate was higher than the statutory federal income tax rate of 21% in the 2024 period primarily attributable to state taxes. The effective income tax rate for the 2023 thirteen-week period was 23.3%. The effective income tax rate was higher than the statutory federal income tax rate of 21% in the 2023 period primarily attributable to state taxes.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480990/946-20-50-13

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(h)(2))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480678/235-10-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org//740/tableOfContent

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 14
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482685/740-10-50-14

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 21
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482685/740-10-50-21

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 270
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482526/740-270-50-1

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 17
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482685/740-10-50-17

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 6.I.5.Q1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479360/740-10-S99-1

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 11.C)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479360/740-10-S99-2

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482603/740-30-50-2

+ Details

Cover Page - shares	3 Months Ended
Cover Page - shares	Mar. 30, 2024	Apr. 22, 2024
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q1
Document Quarterly Report	true
Entity Central Index Key	0000853816
Document Transition Report	false
Current Fiscal Year End Date	--12-28
Document Period End Date	Mar. 30, 2024
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		35,762,038
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