Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Income Statement [Abstract]
Sales	$ 232,615	$ 226,309
Cost of sales	169,510	163,644
Gross profit	63,105	62,665
Selling, general, and administrative expenses	43,962	45,161
Facility closure and restructuring charges	0	3,931
Operating income	19,143	13,573
Interest income	30	61
Interest expense	(4,347)	(4,462)
Other income (expense), net	826	(6)
Income before income taxes	15,652	9,166
Provision for income taxes	6,312	3,285
Net income	$ 9,340	$ 5,881
Basic income per share	$ 0.19	$ 0.12
Diluted income per share	$ 0.19	$ 0.12
Weighted average shares used in per share calculations:
Basic (in shares)	49,374	49,032
Diluted (in shares)	50,189	49,842