CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Net sales	$ 97,995	$ 94,167	$ 298,075	$ 288,456
Cost of sales	77,501	74,898	233,179	227,953
Gross profit	20,494	19,269	64,896	60,503
Selling, product development and administrative expenses	13,108	14,069	41,472	41,968
Gain on sale of product line			0	(810)
Operating income	7,386	5,200	23,424	19,345
Interest expense	77	96	231	273
Other expense (income), net	(16)	(19)	44	(3)
Income before income taxes	7,325	5,123	23,149	19,075
Income tax expense	2,750	1,248	8,127	4,696
Net income	$ 4,575	$ 3,875	$ 15,022	$ 14,379
Earnings per share:
Basic	$ 0.28	$ 0.23	$ 0.90	$ 0.86
Diluted	$ 0.27	$ 0.23	$ 0.89	$ 0.85
Weighted average number of common shares outstanding:
Basic	16,437	16,630	16,599	16,742
Diluted	16,735	16,943	16,888	16,978