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v2.4.1.9

Minimum Lease Payments (Parenthetical) (Detail) | 12 Months Ended
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Dec. 27, 2014
Minimum |
Capital Leases And Operating Leases [Line Items] |
Capital leases, future minimum payments, interest included in payments, interest rate | 2.00%lstr_CapitalLeasesFutureMinimumPaymentsInterestIncludedInPaymentsInterestRate / us-gaap_RangeAxis = us-gaap_MinimumMember
Maximum |
Capital Leases And Operating Leases [Line Items] |
Capital leases, future minimum payments, interest included in payments, interest rate | 3.90%lstr_CapitalLeasesFutureMinimumPaymentsInterestIncludedInPaymentsInterestRate / us-gaap_RangeAxis = us-gaap_MaximumMember

X
- Details
Name: | lstr_CapitalLeasesAndOperatingLeasesLineItems
Namespace Prefix: | lstr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Capital Leases, Future Minimum Payments, Interest Included in Payments, Interest Rate + References No definition available. + Details
Name: | lstr_CapitalLeasesFutureMinimumPaymentsInterestIncludedInPaymentsInterestRate
Namespace Prefix: | lstr_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |