Consolidated Statements of Income (Loss) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Statement [Abstract]
Net sales	$ 791,188	$ 755,654	$ 737,618
Cost of sales	575,907	557,385	573,094
Gross profit	215,281	198,269	164,524
Selling expenses	85,519	81,475	74,185
General and administrative expenses	77,906	77,136	65,968
Impairment charges	0	1,249	72,014
Operating Expenses	163,425	159,860	212,167
Operating income (loss)	51,856	38,409	(47,643)
Other income, net	0	0	3,827
Interest
Income	(164)	(65)	(561)
Expense	4,679	4,787	7,766
Interest expense-net	4,515	4,722	7,205
Income (loss) before income taxes	47,341	33,687	(51,021)
Income tax expense (benefit)	17,379	9,182	(8,187)
Net income (loss)	$ 29,962	$ 24,505	$ (42,834)
Income (loss) per common share
Basic (in dollars per share)	$ 0.89	$ 0.71	$ (1.21)
Diluted (in dollars per share)	$ 0.88	$ 0.71	$ (1.21)
Dividends declared per share (in dollars per share)	$ 0.32	$ 0.28	$ 0.26