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Leases - Additional Information (Detail) | Sep. 28, 2019 USD ($)
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Leases Disclosure [Line Items] |
Finance Lease Option to Purchase Option Value | $ 1
Lessee, Finance Lease, Term of Contract | 5 years

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- Definition Represents purchase value of option. + References No definition available. + Details
Name: | lstr_FinanceLeaseOptionToPurchaseOptionValue
Namespace Prefix: | lstr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

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- Definition Term of lessee's finance lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980 + Details
Name: | us-gaap_LesseeFinanceLeaseTermOfContract1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant