Acquisition (Narrative) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	0 Months Ended				6 Months Ended
	Sep. 16, 2010 Towable Holdings, Inc., [Member]	Jul. 31, 2011 Towable Holdings, Inc., [Member]	Jan. 31, 2011 Towable Holdings, Inc., [Member]	Oct. 31, 2011 Towable Holdings, Inc., [Member] Working Capital True-Up Adjustments [Member]	Jan. 31, 2012 Heartland Recreational Vehicles, LLC, [Member] years	Jan. 31, 2012 Heartland Recreational Vehicles, LLC, [Member] Trademarks [Member] years	Jan. 31, 2012 Heartland Recreational Vehicles, LLC, [Member] Design Technology Assets [Member] years	Jan. 31, 2012 Heartland Recreational Vehicles, LLC, [Member] Non-Compete Agreements [Member] years	Jan. 31, 2012 Heartland Recreational Vehicles, LLC, [Member] Backlog [Member] weeks	Jan. 31, 2012 Heartland Recreational Vehicles, LLC, [Member] Dealer Network [Member] years
Business Acquisition [Line Items]
Cash paid for acquisition	$ 99,562	$ 99,732		$ 170
Business acquisition purchase price allocation adjustments to reflect finalization of indemnification matters resulting in increase to goodwill					757
Capital lease obligations assumed					429
Weighted average useful life on amortized intangible assets, years					14.9
Amortizable intangible assets being amortized using straight line method						25		5	3	12
Amortization period, Minimum years							10
Amortization period, Maximum years							15
Shares issued of unregistered common stock	4,300,000
Value of shares issued of unregistered common stock	90,531
Acquisition, transaction costs			1,826
Goodwill acquired that remains deductible for tax purposes					$ 11,600