Quarterly Results Of Operations (Details) (USD $) In Thousands, except Per Share data, 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
Quarterly Results Of Operations [Abstract]
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]
Gross profit	35,871	41,542	46,423	44,823	27,782	32,001	42,059	37,879	168,659		139,721		126,170
Income before income taxes	6,759	14,832	18,912	17,299	5,797	9,125	17,849	15,485	57,802		48,256		45,210
Net income	$ 4,745	$ 9,771	$ 11,708	$ 11,116	$ 4,088	$ 5,619	$ 10,965	$ 9,387	$ 37,340		$ 30,059		$ 28,034
Basic	$ 0.21	$ 0.43	$ 0.52	$ 0.50	$ 0.18	$ 0.25	$ 0.49	$ 0.42	$ 1.66		$ 1.35		$ 1.27
Diluted	$ 0.21	$ 0.43	$ 0.52	$ 0.49	$ 0.18	$ 0.25	$ 0.49	$ 0.42	$ 1.64		$ 1.34		$ 1.26
High	$ 33.32	$ 30.86	$ 30.02	$ 29.84	$ 25.88	$ 25.42	$ 26.40	$ 24.41	$ 33.32		$ 26.40
Low	$ 29.48	$ 25.82	$ 25.83	$ 24.67	$ 18.94	$ 17.58	$ 21.57	$ 22.10	$ 24.67		$ 17.58
Close (at end of quarter)	$ 32.25	$ 30.21	$ 27.85	$ 27.31	$ 24.53	$ 19.98	$ 24.72	$ 22.33	$ 32.25		$ 24.53

[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.