Schedule of Segment Reporting Information by Segment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2013
Segment Reporting Information [Line Items]
Net sales	$ 4,006,819	$ 3,525,456	$ 3,241,795
Income (loss) from continuing operations before income taxes	292,895	252,819	221,972
Corporate
Segment Reporting Information [Line Items]
Income (loss) from continuing operations before income taxes	(33,813)	(25,581)	(27,659)
Operating Segments | Recreational vehicles
Segment Reporting Information [Line Items]
Income (loss) from continuing operations before income taxes	325,838	278,400	249,631
Operating Segments | Recreational vehicles | Towables
Segment Reporting Information [Line Items]
Income (loss) from continuing operations before income taxes	259,092	221,123	205,724
Operating Segments | Recreational vehicles | Motorized
Segment Reporting Information [Line Items]
Income (loss) from continuing operations before income taxes	66,746	57,277	43,907
Operating Segments | Other
Segment Reporting Information [Line Items]
Income (loss) from continuing operations before income taxes	1,424
Intercompany Eliminations
Segment Reporting Information [Line Items]
Income (loss) from continuing operations before income taxes	(554)
Continuing Operations
Segment Reporting Information [Line Items]
Net sales	4,006,819	3,525,456	3,241,795
Continuing Operations | Operating Segments | Recreational vehicles
Segment Reporting Information [Line Items]
Net sales	3,967,204	3,525,456	3,241,795
Continuing Operations | Operating Segments | Recreational vehicles | Towables
Segment Reporting Information [Line Items]
Net sales	3,096,405	2,721,625	2,650,253
Continuing Operations | Operating Segments | Recreational vehicles | Motorized
Segment Reporting Information [Line Items]
Net sales	870,799	$ 803,831	$ 591,542
Continuing Operations | Operating Segments | Other
Segment Reporting Information [Line Items]
Net sales	56,594
Continuing Operations | Intercompany Eliminations
Segment Reporting Information [Line Items]
Net sales	$ (16,979)