CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
Sales	$ 200,586	$ 196,662
Cost of sales	136,959	133,609
Gross profit	63,627	63,053
Selling, general, and administrative expenses	53,333	47,601
Operating profit	10,294	15,452
Interest expense	1,495	1,506
Other (income) expense, net	(1,291)	2,200
Income before income tax expense	10,090	11,746
Income tax expense	4,016	4,489
Net income	6,074	7,257
Net earnings per share:
Basic (in dollars per share)	$ 0.13	$ 0.16
Diluted (in dollars per share)	$ 0.13	$ 0.15
Dividends per share (in dollars per share)	$ 0.12	$ 0.10
Weighted-average shares outstanding:
Basic (in shares)	46,833,216	46,496,144
Diluted (in shares)	47,572,486	47,095,990
Net income	6,074	7,257
Other comprehensive income (loss)
Foreign currency translation adjustment	(2,525)	2,647
Pension and other post-retirement liability adjustment, net of tax	956
Total other comprehensive income (loss)	(1,569)	2,647
Total comprehensive income	$ 4,505	$ 9,904