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Subsequent Events - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 1 Months Ended |
--- | --- | ---
Oct. 31, 2013 Tractor | Jan. 31, 2014 Subsequent Event [Member] | Jan. 31, 2014 Minimum [Member] Subsequent Event [Member] | Jan. 31, 2014 Maximum [Member] Subsequent Event [Member]
Subsequent Event [Line Items] |  |  |  |
Purchase contract units, tractors | 200 |  |  |
Total costs of purchasing tractors | $ 25.4 |  |  |
Secured debt period |  | 5 years |  |
Interest on secured debt |  |  | 1.87% | 1.93%

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- Definition Cost Of Purchasing Tractors + References No definition available. + Details
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- Definition Purchase Contract Units, Tractors + References No definition available. + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Details
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