Acquisitions - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	1 Months Ended	3 Months Ended			3 Months Ended		1 Months Ended	3 Months Ended	1 Months Ended	3 Months Ended	1 Months Ended			3 Months Ended	1 Months Ended							1 Months Ended				1 Months Ended
	Aug. 30, 2013	Oct. 31, 2013	Oct. 31, 2012	Jul. 31, 2013	Oct. 31, 2013 Minimum	Oct. 31, 2013 Maximum	Aug. 30, 2013 Trademarks	Oct. 31, 2013 Trademarks	Aug. 30, 2013 Dealer Networks	Oct. 31, 2013 Dealer Networks	Aug. 30, 2013 Backlog	Aug. 30, 2013 Design Technology Assets	Aug. 30, 2013 Non-Compete Agreements	Oct. 31, 2013 Non-Compete Agreements	Dec. 20, 2012 Buses	Oct. 03, 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	Oct. 31, 2013 Bison	Oct. 31, 2013 Bison Trademarks	Oct. 31, 2013 Bison Dealer Networks	Oct. 31, 2013 Bison Backlog	Aug. 30, 2013 Livin' Lite	Oct. 31, 2013 Livin' Lite	Aug. 30, 2013 Livin' Lite Trademarks	Aug. 30, 2013 Livin' Lite Dealer Networks	Aug. 30, 2013 Livin' Lite Backlog	Aug. 30, 2013 Livin' Lite Design Technology Assets	Aug. 30, 2013 Livin' Lite Non-Compete Agreements
Business Acquisition [Line Items]
Payment to acquire business																						$ 16,718				$ 17,016	$ 17,056
Asset purchase agreement date																Oct. 03, 2012						Oct. 31, 2013				Aug. 30, 2013
Amortizable intangible assets, weighted average useful life	10 years 2 months 12 days				10 years	12 years
Payment to acquire business, net		33,774	3,914																							16,769
Business acquisition, cash due from escrow																											287
Amortizable intangible assets, amortization period							20 years	21 years	8 years	9 years	42 days	5 years	2 years	2 years
Amortizable intangible assets, amortization method							Straight line basis		Accelerated cash flow basis		Straight line basis	Straight line basis	Straight line basis
Payment to acquire business															6,804	3,914
Business acquisition allocated to inventory															804	915
Business acquisition allocated to property and equipment															630	331						625				137
Business acquisition allocated to goodwill		253,276		238,103											4,495	768						6,060				9,113
Business acquisition allocated to amortizing intangible asset																	670	1,000	410	900	20		2,000	7,800	140			1,500	3,200	110	1,100	130
Business acquisition allocated to Certain liabilities															$ 225