XML 55 R37.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Significant Accounting Policies - Additional Information (Detail) | 12 Months Ended |
--- | --- | ---
Dec. 30, 2023 USD ($) Segment $ / shares shares | Dec. 31, 2022 USD ($) $ / shares shares | Dec. 25, 2021 USD ($) shares | Dec. 26, 2020 shares
Significant Accounting Policies [Line Items] |  |  |  |
Number of reporting units | Segment | 2 |  |  |
Stock options excluded from calculation of diluted earnings per share, antidilutive | shares | 0 | 0 | 0 |
Dividends payable per share | $ / shares | $ 2 | $ 2 |  |
Dividend payable date | Jan. 19, 2024 | Jan. 20, 2023 |  |
Dividend record date | Jan. 03, 2024 | Jan. 06, 2023 |  |
Dividends payable | $ 71,433,000 | $ 71,854,000 |  |
Dividend announced date | Dec. 04, 2023 | Dec. 06, 2022 |  |
Restricted Cash | $ 0 | $ 0 | $ 4,049,000 |
Short-term investments | $ 59,661,000 | $ 53,955,000 | $ 35,778,000 |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number | shares | 0 | 1,900 | 8,570 | 17,650
Weighted average number of shares outstanding, diluted, adjustment | shares | 0 | 0 | 0 |
Buildings And Improvements |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Depreciated life | 30 years |  |  |
Trailing Equipment | Maximum |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Depreciated life | 10 years |  |  |
Trailing Equipment | Minimum |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Depreciated life | 7 years |  |  |
Hardware And Software | Maximum |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Depreciated life | 7 years |  |  |
Hardware And Software | Minimum |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Depreciated life | 3 years |  |  |
Commercial Trucking Claims |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Company retained aggregate liability | $ 10,000,000 |  |  |
Self insurance excess value maintain third party | 5,000,000 |  |  |
Commercial Trucking Claims | Initial Excess Policy [Member] |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Liability for claims and claims adjustment expense | 18,000,000 |  |  |
Commercial Trucking Claims | Third Party Insurance [Member] | Excess Coverage Policy [Member] |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Self insurance excess value maintain third party | 10,000,000 |  |  |
Commercial Trucking Claims | Maximum |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Company retained liability per claim | 10,000,000 | $ 10,000,000 |  |
Commercial Trucking Claims | Maximum | Initial Excess Policy [Member] |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Company retained aggregate liability | 15,000,000 | 10,000,000 |  |
Commercial Trucking Claims | Minimum |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Company retained liability per claim | 5,000,000 | 5,000,000 |  |
Commercial Trucking Claims | Minimum | Initial Excess Policy [Member] |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Company retained aggregate liability | 5,000,000 | $ 5,000,000 |  |
General Liability Claim |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Company retained liability per claim | 2,000,000 |  |  |
Workers' Compensation Claim |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Company retained liability per claim | 250,000 |  |  |
Workers' Compensation Claim | BCO Independent Contractor |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Company retained liability per claim | 750,000 |  |  |
Cargo Claim |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Company retained liability per claim | 250,000 |  |  |
Occupational Reinsurance Claims One [Member] | BCO Independent Contractor |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Company retained liability per claim | 500,000 |  |  |
Occupational Reinsurance Claims Two [Member] | BCO Independent Contractor |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Company retained liability per claim | 1,000,000 |  |  |
Occupational Reinsurance Claims Three [Member] | BCO Independent Contractor |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Company retained liability per claim | $ 2,000,000 |  |  |

X
- Definition Date the dividend to be paid was announced, in CCYY-MM-DD format. + References No definition available. + Details
Name: | lstr_DividendsPayableDateAnnouncedDayMonthAndYear
Namespace Prefix: | lstr_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Self insurance excess value maintain third party. + References No definition available. + Details
Name: | lstr_SelfInsuranceExcessValueMaintainThirdParty
Namespace Prefix: | lstr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Self insurance retained aggregate liability. + References No definition available. + Details
Name: | lstr_SelfInsuranceRetainedAggregateLiability
Namespace Prefix: | lstr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Self Insurance Retained Liability + References No definition available. + Details
Name: | lstr_SelfInsuranceRetainedLiability
Namespace Prefix: | lstr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Significant accounting policies line items. + References No definition available. + Details
Name: | lstr_SignificantAccountingPoliciesLineItems
Namespace Prefix: | lstr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482662/260-10-50-1 + Details
Name: | us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Date the declared dividend will be paid, in YYYY-MM-DD format. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482913/230-10-50-3 + Details
Name: | us-gaap_DividendPayableDateToBePaidDayMonthAndYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition The per share amount of a dividend declared, but not paid, as of the financial reporting date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482913/230-10-50-3 + Details
Name: | us-gaap_DividendsPayableAmountPerShare
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_DividendsPayableCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Date the holder must own the stock to be entitled to the dividend, in YYYY-MM-DD format. + References No definition available. + Details
Name: | us-gaap_DividendsPayableDateOfRecordDayMonthAndYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount needed to reflect the estimated ultimate cost of settling claims relating to insured events that have occurred on or before the balance sheet date, whether or not reported to the insurer at that date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (cc) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480081/944-40-50-3 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480081/944-40-50-3 + Details
Name: | us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Number of reporting units tested for impairment of goodwill. A reporting unit is an operating segment or one level below an operating segment. + References No definition available. + Details
Name: | us-gaap_NumberOfReportingUnits
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of cash restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(2)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(1)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482913/230-10-50-8 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(1)(a)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1 + Details
Name: | us-gaap_RestrictedCash
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(ii) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of investments including trading securities, available-for-sale securities, held-to-maturity securities, and short-term investments classified as other and current. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(8)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(5)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(4)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1 + Details
Name: | us-gaap_ShortTermInvestments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482662/260-10-50-1 + Details
Name: | us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_BuildingAndBuildingImprovementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=lstr_TrailingEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=lstr_HardwareAndSoftwareMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | lstr_SelfInsurancePerOccurrenceAxis=lstr_CommercialTruckingClaimsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | lstr_InsurancePolicyTypeAxis=lstr_InitialExcessPolicyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | lstr_ThirdPartyInsurancePerOccurrenceAxis=lstr_ThirdPartyInsuranceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | lstr_InsurancePolicyTypeAxis=lstr_ExcessCoveragePolicyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | lstr_SelfInsurancePerOccurrenceAxis=lstr_GeneralLiabilityClaimMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | lstr_SelfInsurancePerOccurrenceAxis=lstr_WorkersCompensationClaimMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ContractWithCustomerSalesChannelAxis=lstr_BcoIndependentContractorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | lstr_SelfInsurancePerOccurrenceAxis=lstr_CargoClaimMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | lstr_SelfInsurancePerOccurrenceAxis=lstr_OccupationalReinsuranceClaimsOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | lstr_SelfInsurancePerOccurrenceAxis=lstr_OccupationalReinsuranceClaimsTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | lstr_SelfInsurancePerOccurrenceAxis=lstr_OccupationalReinsuranceClaimsThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |