CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net sales	$ 397,969	$ 378,924	$ 383,588
Cost of sales	312,744	301,117	316,082
Gross profit	85,225	77,807	67,506
Selling, product development and administrative expenses	56,512	57,239	52,937
Gain on sale of product line	0	(810)	(1,619)
Operating income	28,713	21,378	16,188
Interest expense	304	365	880
Other expense (income), net	67	31	(94)
Income from continuing operations before income taxes	28,342	20,982	15,402
Income tax expense from continuing operations	9,187	4,176	6,355
Income from continuing operations	19,155	16,806	9,047
Income from discontinued operations, net	0	0	4,732
Net income	$ 19,155	$ 16,806	$ 13,779
Basic earnings per common share:
Continuing operations	$ 1.16	$ 1.01	$ 0.54
Discontinued operations	$ 0	$ 0	$ 0.28
Net income	$ 1.16	$ 1.01	$ 0.82
Weighted average common shares outstanding	16,570	16,717	16,753
Diluted earnings per common share:
Continuing operations	$ 1.14	$ 0.99	$ 0.54
Discontinued operations	$ 0	$ 0	$ 0.28
Net income	$ 1.14	$ 0.99	$ 0.82
Weighted average common shares and equivalents outstanding	16,866	16,973	16,896