Interim Financial Information (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 Financial Information Disclosure [Abstract]
Net sales	$ 360,423	$ 367,217	$ 372,720	$ 355,101	$ 374,190	$ 382,322	$ 390,675	$ 354,452	$ 1,455,461	$ 1,501,639	$ 1,424,564
Gross profit	107,070	111,450	115,784	110,597	119,828	122,172	125,125	114,019	444,901	481,144	472,370
Earnings before income taxes	(8,194)	4,045	6,850	7,273	(34,558)	13,161	5,099	7,160	9,974	(9,138)	23,944
Income (Loss) from Continuing Operations Attributable to Parent	(10,777)	1,208	(4,305)	5,605	(39,678)	8,891	7,579	4,690	(8,269)	(18,518)	11,604
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	3,482	1,656	2,328	2,630	4,650	3,909	3,082	2,764	10,096	14,405	13,737
Net Earnings (loss)	$ (7,295)	$ 2,864	$ (1,977)	$ 8,235	$ (35,028)	$ 12,800	$ 10,661	$ 7,454	$ 1,827	$ (4,113)	$ 25,341
Income (Loss) from Continuing Operations, Per Basic Share	$ (0.34)	$ 0.04	$ (0.14)	$ 0.18	$ (1.25)	$ 0.28	$ 0.24	$ 0.15	$ (0.26)	$ (0.58)	$ 0.36
Income (Loss) from Discontinued Operations, Net of Tax, Per Basic Share	$ 0.11	$ 0.05	$ 0.07	$ 0.08	$ 0.15	$ 0.12	$ 0.10	$ 0.09	$ 0.32	$ 0.45	$ 0.42
Net earnings (loss) per share - basic	$ (0.23)	$ 0.09	$ (0.06)	$ 0.26	$ (1.10)	$ 0.40	$ 0.33	$ 0.23	$ 0.06	$ (0.13)	$ 0.78
Income (Loss) from Continuing Operations, Per Diluted Share	$ (0.34)	$ 0.04	$ (0.14)	$ 0.18	$ (1.25)	$ 0.28	$ 0.23	$ 0.14	$ (0.26)	$ (0.58)	$ 0.35
Income (Loss) from Discontinued Operations, Net of Tax, Per Diluted Share	$ 0.11	$ 0.05	$ 0.07	$ 0.08	$ 0.15	$ 0.12	$ 0.09	$ 0.08	$ 0.32	$ 0.45	$ 0.42
Net Earnings (loss) per Share - Assuming Dilution	$ (0.23)	$ 0.09	$ (0.06)	$ 0.26	$ (1.10)	$ 0.40	$ 0.32	$ 0.23	$ 0.06	$ (0.13)	$ 0.78