CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Statement [Abstract]
Net sales	$ 524,505	$ 535,829	$ 397,969
Cost of sales	402,008	420,851	312,744
Gross profit	122,497	114,978	85,225
Selling, product development and administrative expenses	70,020	80,930	56,512
Operating income	52,477	34,048	28,713
Gain on sale of business	(18,647)	0	0
Interest expense	755	1,093	304
Other (income) expense, net	(654)	(701)	67
Income before income taxes	71,023	33,656	28,342
Income tax expense	24,764	11,809	9,187
Net income	$ 46,259	$ 21,847	$ 19,155
Earnings per common share:
Basic (in USD per share)	$ 2.76	$ 1.31	$ 1.16
Diluted (in USD per share)	$ 2.71	$ 1.28	$ 1.14
Weighted average common shares outstanding (in shares)	16,746	16,662	16,570
Weighted average common shares and equivalents outstanding (in shares)	17,084	17,003	16,866