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Acquisitions - Additional Information (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
1 Months Ended 1 Months Ended
Sep. 16, 2010
Towable Holdings, Inc.
Oct. 31, 2011
Towable Holdings, Inc.
Jul. 31, 2011
Towable Holdings, Inc.
Oct. 03, 2012
Buses
Dec. 20, 2012
Buses
Dec. 20, 2012
Buses
Trademarks
Oct. 03, 2012
Buses
Trademarks
Dec. 20, 2012
Buses
Dealer networks
Oct. 03, 2012
Buses
Dealer networks
Dec. 20, 2012
Buses
Backlog
Business Acquisition [Line Items]                    
Cash paid for acquisition $ 99,562 $ 170 $ 99,732 $ 3,914 $ 6,804          
Shares issued of unregistered common stock 4,300,000                  
Value of shares issued of unregistered common stock 90,531                  
Business acquisition allocated to goodwill 94,308     768 4,495          
Intangible assets 118,320                  
Business acquisition allocated to inventory       915 804          
Business acquisition allocated to property and equipment       331 630          
Business acquisition allocated to amortizing intangible asset           670 1,000 410 900 20
Asset purchase agreement date       Sep. 17, 2012            
Business acquisition allocated to Certain liabilities         $ 225