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Noncontrolling Interest - Additional Information (Detail) | 1 Months Ended | 3 Months Ended
--- | --- | ---
Jan. 31, 2011 | Sep. 26, 2009
Noncontrolling Interest [Line Items] |  |
Preferred stock non-voting interests | 100.00% | 100.00%
Common stock, voting rights percentage | 100.00% | 75.00%
Acquired common equity interest | 25.00% |

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- Definition Voting rights percentage owned of common stock. Includes eligibility to vote and votes per share owned. Include also, if any, unusual voting rights. + References No definition available. + Details
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Namespace Prefix: | lstr_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Preferred stock non voting rights. + References No definition available. + Details
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Namespace Prefix: | lstr_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Percentage of voting equity interests acquired in the business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=7659399&loc=d3e1392-128463 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 68 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration