XML 44 R31.htm IDEA: XBRL DOCUMENT
v3.19.2

Significant Accounting Policies - Additional Information (Detail) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 29, 2019 | Jun. 30, 2018 | Jun. 29, 2019 | Jun. 30, 2018
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 1,045,040,000 | $ 1,182,786,000 | $ 2,078,040,000 | $ 2,230,712,000
BCO Independent Contractor |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Consolidated revenue, percentage | 45.00% | 45.00% | 44.00% | 45.00%
Truck Brokerage Carriers |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Consolidated revenue, percentage | 47.00% | 49.00% | 48.00% | 49.00%
Railroads |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Consolidated revenue, percentage | 3.00% | 3.00% | 3.00% | 3.00%
Air and Ocean Cargo Carriers |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Consolidated revenue, percentage | 3.00% | 2.00% | 3.00% | 2.00%
BCO Independent Contractor and Truck Brokerage Carriers | Van Equipment |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 605,365,000 | $ 713,341,000 | $ 1,224,379,000 | $ 1,369,476,000
BCO Independent Contractor and Truck Brokerage Carriers | Unsided/Platform Equipment |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 338,107,000 | 364,676,000 | 648,828,000 | 664,045,000
BCO Independent Contractor and Truck Brokerage Carriers | Less than Truckload |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 24,732,000 | $ 27,364,000 | $ 48,108,000 | $ 50,948,000

X
- Definition Percentage of consolidated revenue. + References No definition available. + Details
Name: | lstr_PercentageOfConsolidatedRevenue
Namespace Prefix: | lstr_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- 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 No definition available. + Details
Name: | us-gaap_DisaggregationOfRevenueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8933-108599 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 + Details
Name: | us-gaap_Revenues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

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

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

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

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

X
- Details
Name: | srt_ProductOrServiceAxis=lstr_VanEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=lstr_UnsidedPlatformEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=lstr_LessThanTruckloadMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |