Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
REVENUES:
Net sales	$ 341,254	$ 308,770	$ 313,056
Other	414	490	660
TOTAL REVENUE	341,668	309,260	313,716
COST OF GOODS SOLD	160,871	157,859	158,984
Gross profit	180,797	151,401	154,732
OPERATING EXPENSES:
Selling, general and administrative	83,216	88,939	89,006
Research and development	15,714	18,332	12,407
Restructuring and strategic transaction	8,451	5,093	1,370
Gain on sale of building	(1,086)	0	0
Legal settlements, net	1,798	0	0
Impairment of assets held for sale	4,139	0	0
Total operating expenses	112,232	112,364	102,783
Income from operations	68,565	39,037	51,949
OTHER INCOME	1,134	755	765
Income before income taxes	69,699	39,792	52,714
PROVISION FOR INCOME TAXES	(24,714)	(13,457)	(12,296)
NET INCOME	$ 44,985	$ 26,335	$ 40,418
NET INCOME PER SHARE
Basic	$ 2.84	$ 1.72	$ 2.75
Diluted	$ 2.73	$ 1.68	$ 2.65
WEIGHTED AVERAGE NUMBER OF SHARES
Basic (in shares)	15,848	15,282	14,688
Diluted (in shares)	16,496	15,647	15,274