Components of Amortizable Intangible Assets (Detail) - USD ($) $ in Thousands						12 Months Ended
	May 01, 2015	Jan. 05, 2015	May 01, 2014	Oct. 31, 2013	Aug. 30, 2013	Jul. 31, 2016	Jul. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Cost						$ 588,327	$ 226,252
Accumulated Amortization						$ 80,936	57,234
Dealer Network/Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Weighted Average Years Remaining Life						16 years
Cost						$ 404,960	143,860
Accumulated Amortization						$ 55,191	37,194
Trademarks
Finite-Lived Intangible Assets [Line Items]
Weighted Average Years Remaining Life	15 years	20 years	20 years	20 years	20 years	19 years
Cost						$ 148,117	55,282
Accumulated Amortization						$ 10,539	7,608
Design Technology And Other Intangibles
Finite-Lived Intangible Assets [Line Items]
Weighted Average Years Remaining Life						9 years
Cost						$ 22,400	22,400
Accumulated Amortization						$ 10,870	8,168
Non-Compete Agreements
Finite-Lived Intangible Assets [Line Items]
Weighted Average Years Remaining Life			5 years		2 years	3 years
Cost						$ 450	4,710
Accumulated Amortization						$ 203	$ 4,264
Backlog
Finite-Lived Intangible Assets [Line Items]
Weighted Average Years Remaining Life	42 days	42 days	2 months	42 days	42 days	2 months 12 days
Cost						$ 12,400
Accumulated Amortization						$ 4,133