Consolidated Income Statements (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Gross sales	$ 134,487	$ 119,054	$ 238,198	$ 212,989
Commissions, allowances and rebates	649	833	1,243	1,336
Net sales	133,838	118,221	236,955	211,653
Other revenues, net	716	417	2,605	1,726
Net revenue	134,554	118,638	239,560	213,379
Cost of goods sold	77,052	70,081	135,233	125,923
Gross profit	57,502	48,557	104,327	87,456
Operating expenses:
Selling, general and administrative expenses	18,480	13,607	34,234	27,652
Research and development expenses	4,467	4,125	8,357	7,603
Total operating expenses	22,947	17,732	42,591	35,255
Operating profit	34,555	30,825	61,736	52,201
Other expenses/(income):
Interest expense/(income), net	388	46	654	(9)
Other (income)/expenses, net	(131)	180	(143)	214
Income before income taxes	34,298	30,599	61,225	51,996
Provision for income taxes	9,174	9,789	14,986	16,341
Income from continuing operations	25,124	20,810	46,239	35,655
Loss from discontinued operations, net of tax	(94)	(316)	(1,344)	(579)
Net income	$ 25,030	$ 20,494	$ 44,895	$ 35,076
Basic earnings/(loss) per share of common stock:
Income from continuing operations (in dollars per share)	$ 0.77	$ 0.65	$ 1.42	$ 1.12
Loss from discontinued operations, net of tax (in dollars per share)	0	(0.01)	(0.04)	(0.02)
Net income (in dollars per share)	0.77	0.64	1.38	1.10
Diluted earnings/(loss) per share of common stock:
Income from continuing operations (in dollars per share)	0.75	0.63	1.38	1.09
Loss from discontinued operations, net of tax (in dollars per share)	0	(0.01)	(0.04)	(0.02)
Net income (in dollars per share)	$ 0.75	$ 0.62	$ 1.34	$ 1.07
Weighted average shares outstanding:
Basic (in shares)	32,629	32,063	32,542	31,975
Effect of dilutive stock based compensation (in shares)	840	863	874	873
Diluted (in shares)	33,469	32,926	33,416	32,848