Segment Reporting (Schedule Of Net Sales By Product) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Segment Reporting Information [Line Items]
Total net sales	$ 200,234	$ 226,323	$ 251,014	$ 223,552	$ 159,596	$ 166,689	$ 186,048	$ 168,833	$ 901,123	[1]	$ 681,166	[1]	$ 572,755	[1]
RV Segment - Chassis, Chassis Parts And Slide-Out Mechanisms [Member]
Segment Reporting Information [Line Items]
Total net sales									443,850		316,580		261,811
RV Segment - Windows, Doors And Screens [Member]
Segment Reporting Information [Line Items]
Total net sales									173,436		126,130		112,679
RV Segment - Furniture And Mattresses [Member]
Segment Reporting Information [Line Items]
Total net sales									78,082		67,088		49,017
RV Segment - Axles And Suspension Solutions [Member]
Segment Reporting Information [Line Items]
Total net sales									57,275		43,669		38,420
RV Segment - Other [Member]
Segment Reporting Information [Line Items]
Total net sales									28,282		17,176		15,275
RV Segment [Member]
Segment Reporting Information [Line Items]
Total net sales									780,925	[1]	570,643	[1]	477,202	[1]
MH Segment - Windows, Door And Screens [Member]
Segment Reporting Information [Line Items]
Total net sales									63,655		58,377		57,154
MH Segment - Chassis And Chassis Parts [Member]
Segment Reporting Information [Line Items]
Total net sales									41,874		38,754		25,070
MH Segment - Other [Member]
Segment Reporting Information [Line Items]
Total net sales									14,669		13,392		13,329
MH Segment [Member]
Segment Reporting Information [Line Items]
Total net sales									$ 120,198	[1]	$ 110,523	[1]	$ 95,553	[1]

[1] Thor Industries, Inc., a customer of the RV Segment, accounted for 34 percent, 36 percent and 41 percent of the Company's consolidated net sales for the years ended December 31, 2012, 2011 and 2010, respectively. Berkshire Hathaway Inc. (through its subsidiaries Forest River, Inc. and Clayton Homes, Inc.), a customer of both segments, accounted for 27 percent, 27 percent and 26 percent of the Company's consolidated net sales for the years ended December 31, 2012, 2011 and 2010, respectively. No other customer accounted for more than 10 percent of consolidated net sales in the years ended December 31, 2012, 2011 and 2010.