XML 80 R63.htm IDEA: XBRL DOCUMENT
v3.6.0.2

Commitments and Contingencies - Additional Information (Detail) $ in Thousands | Dec. 31, 2016 USD ($)
--- | ---
Revolving Credit Facility |
Commitments and Contingencies Disclosure [Line Items] |
Letters of credit outstanding | $ 35,599
Guarantee Payment Of Insurance Claims |
Commitments and Contingencies Disclosure [Line Items] |
Letters of credit outstanding | $ 61,110

X
- Definition Commitments and Contingencies Disclosure [Line Items] + References No definition available. + Details
Name: | lstr_CommitmentsAndContingenciesDisclosureLineItems
Namespace Prefix: | lstr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
Name: | us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_GuaranteeObligationsByNatureAxis=lstr_GuaranteePaymentOfInsuranceClaimsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |