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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $) | 12 Months Ended |  | 12 Months Ended | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Feb. 28, 2013 | Dec. 31, 2013 Retail | Dec. 31, 2012 Retail | Dec. 31, 2013 Used Trailers | Dec. 31, 2012 Used Trailers | Dec. 31, 2011 Used Trailers | Dec. 31, 2013 Building and Building Improvements | Dec. 31, 2013 Machinery and Equipment Maximum | Dec. 31, 2013 Machinery and Equipment Minimum | Feb. 29, 2012 Manufacturing Facility In Cadiz Kentucky | Dec. 31, 2013 Manufacturing Facility In Cadiz Kentucky | Dec. 31, 2013 Software Maximum | Dec. 31, 2013 Software Minimum
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment, additions |  |  |  |  |  |  | $ 26,200,000 | $ 19,500,000 | $ 16,200,000 |  |  |  |  |  |  |
Accounts payable, trade |  |  |  |  |  |  | 15,600,000 | 10,800,000 |  |  |  |  |  |  |  |
Property plant and equipment net realizable value |  |  |  |  |  |  | 15,300,000 | 10,800,000 |  |  |  |  |  |  |  |
Prepaid expenses and other | 9,600,000 | 8,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted cash and cash equivalents |  | 2,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment, estimated useful |  |  |  |  |  |  |  |  |  | 33 years | 10 years | 3 years |  |  | 7 years | 3 years
General and administrative expenses cost of goods sold depreciation | 15,700,000 | 12,700,000 | 10,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Capital lease expiration period |  |  |  |  |  |  |  |  |  |  |  |  |  | 10 years |  |
The Company entered into a non-cash capital lease obligation for its manufacturing facility in Cadiz, Kentucky | 6,851,000 | 3,781,000 |  |  |  |  |  |  |  |  |  |  | 2,700,000 |  |  |
Capital lease obligation cash payment at closing |  |  |  |  |  |  |  |  |  |  |  |  | 800,000 |  |  |
Capital lease agreements, net | 10,900,000 | 6,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accumulated depreciation, net | 2,400,000 | 1,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization expense | 21,786,000 | 10,590,000 | 2,955,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated amortization expense for 2014 | 21,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated amortization expense for 2015 | 21,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated amortization expense for 2016 | 20,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated amortization expense for 2017 | 16,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated amortization expense for 2018 | 15,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Changes in the carrying amounts of goodwill |  |  |  |  | 10,200,000 | 10,200,000 |  |  |  |  |  |  |  |  |  |
Amortization expense | 700,000 | 2,300,000 | 2,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Research and development expense | 2,200,000 | 1,700,000 | 1,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Capitalized software costs, net of amortization | 200,000 | 900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital lease agreement, Obligation amount |  |  |  | 4,300,000 |  |  |  |  |  |  |  |  |  |  |  |
Goodwill, impairment loss | $ 0 | $ 0 | $ 0 |  |  |  |  |  |  |  |  |  |  |  |  |

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