Components of Amortizable Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	0 Months Ended			3 Months Ended
	May 01, 2014	Oct. 31, 2013	Aug. 30, 2013	Oct. 31, 2014	Jul. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Cost				$ 161,752	$ 162,422
Accumulated Amortization				45,658	42,639
Dealer Networks
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life in Years	12 years	12 years	8 years	9 years
Cost				90,760	90,760
Accumulated Amortization				29,642	27,102
Non-Compete Agreements
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life in Years	5 years		2 years	2 years
Cost				4,710	4,710
Accumulated Amortization				3,528	3,283
Trademarks
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life in Years	20 years	20 years	20 years	20 years
Cost				43,882	43,882
Accumulated Amortization				5,947	5,479
Design Technology And Other Intangibles
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life in Years				10 years
Cost				22,400	23,070
Accumulated Amortization				$ 6,541	$ 6,775