Schedule of Segment Reporting Information by Segment (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Oct. 31, 2013	Oct. 31, 2012
Segment Reporting Information [Line Items]
Net sales	$ 799,963	$ 761,424
Income (loss) from continuing operations before income taxes	54,441	44,168
Recreation Vehicles
Segment Reporting Information [Line Items]
Income (loss) from continuing operations before income taxes	59,067	51,148
Recreation Vehicles | Towables
Segment Reporting Information [Line Items]
Income (loss) from continuing operations before income taxes	45,624	42,710
Recreation Vehicles | Motorized
Segment Reporting Information [Line Items]
Income (loss) from continuing operations before income taxes	13,443	8,438
Corporate
Segment Reporting Information [Line Items]
Income (loss) from continuing operations before income taxes	(4,626)	(6,980)
Continuing Operations | Recreation Vehicles
Segment Reporting Information [Line Items]
Net sales	799,963	761,424
Continuing Operations | Recreation Vehicles | Towables
Segment Reporting Information [Line Items]
Net sales	622,853	639,182
Continuing Operations | Recreation Vehicles | Motorized
Segment Reporting Information [Line Items]
Net sales	$ 177,110	$ 122,242