Acquisitions - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	0 Months Ended		3 Months Ended		0 Months Ended		3 Months Ended	0 Months Ended	3 Months Ended		0 Months Ended			3 Months Ended	0 Months Ended			3 Months Ended	0 Months Ended		3 Months Ended	0 Months Ended			3 Months Ended	0 Months Ended	3 Months Ended
	Oct. 31, 2013	Aug. 30, 2013	Oct. 31, 2014	Oct. 31, 2013	May 01, 2014 K.Z. Inc.	Oct. 31, 2013 Bison	Apr. 30, 2014 Bison	Aug. 30, 2013 Livin' Lite	Oct. 31, 2013 Livin' Lite	Jan. 31, 2014 Livin' Lite	May 01, 2014 Dealer Networks	Oct. 31, 2013 Dealer Networks	Aug. 30, 2013 Dealer Networks	Oct. 31, 2014 Dealer Networks	May 01, 2014 Trademarks	Oct. 31, 2013 Trademarks	Aug. 30, 2013 Trademarks	Oct. 31, 2014 Trademarks	May 01, 2014 Non-Compete Agreements	Aug. 30, 2013 Non-Compete Agreements	Oct. 31, 2014 Non-Compete Agreements	May 01, 2014 Backlog	Oct. 31, 2013 Backlog	Aug. 30, 2013 Backlog	Oct. 31, 2014 Backlog	Aug. 30, 2013 Design Technology Assets	Oct. 31, 2014 Design Technology Assets
Business Acquisition [Line Items]
Payment to acquire business					$ 53,405	$ 16,718	$ 16,914		$ 17,056
Purchase price adjustment					2,915
Asset purchase agreement date					May 01, 2014	Oct. 31, 2013		Aug. 30, 2013
Amortizable intangible assets, weighted average useful life	13 years 3 months 18 days	10 years 2 months 12 days			13 years 10 months 24 days
Intangible assets amortization period											12 years	12 years	8 years	9 years	20 years	20 years	20 years	20 years	5 years	2 years	2 years	2 months	42 days	42 days		5 years
Amortizable intangible assets, amortization method														Accelerated cash flow basis				Straight line basis			Straight line basis				Straight line basis		Straight line basis
Additional cash payment							196
Payment to acquire business, net			2,915	33,774	55,324			16,769
Business acquisition, cash due from escrow										$ 287