CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Net sales	$ 101,051	$ 97,535	$ 200,080	$ 194,289
Cost of sales	78,014	75,542	155,678	153,055
Gross profit	23,037	21,993	44,402	41,234
Selling, product development and administrative expenses	13,516	13,655	28,364	27,899
Gain on sale of product line	0	(405)	0	(810)
Operating income	9,521	8,743	16,038	14,145
Interest expense	76	87	154	177
Other expense (income), net	18	(27)	60	16
Income before income taxes	9,427	8,683	15,824	13,952
Income tax expense	3,472	2,091	5,377	3,448
Net income	$ 5,955	$ 6,592	$ 10,447	$ 10,504
Earnings per share:
Basic	$ 0.36	$ 0.39	$ 0.63	$ 0.63
Diluted	$ 0.35	$ 0.39	$ 0.62	$ 0.62
Weighted average number of common shares outstanding:
Basic	16,612	16,770	16,674	16,799
Diluted	16,831	16,962	16,927	16,939