CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Net sales	$ 99,029	$ 96,754
Cost of sales	77,664	77,513
Gross profit	21,365	19,241
Selling, product development and administrative expenses	14,848	14,244
Gain on sale of product line	0	(405)
Operating income	6,517	5,402
Interest expense	78	90
Other expense, net	42	43
Income before income taxes	6,397	5,269
Income tax expense	1,905	1,357
Net income	$ 4,492	$ 3,912
Earnings per share:
Basic	$ 0.27	$ 0.23
Diluted	$ 0.26	$ 0.23
Weighted average number of common shares outstanding:
Basic	16,752	16,828
Diluted	17,036	16,981