Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Income Statement [Abstract]
Net sales	$ 131,676	$ 120,800
Cost of sales	74,049	72,553
Gross profit	57,627	48,247
Selling, general and administrative expenses	20,612	20,593
Income from operations	37,015	27,654
Interest expense, net	572	137
Income before income taxes	36,443	27,517
Provision for income taxes	13,041	9,964
Net income	$ 23,402	$ 17,553
Basic earnings per common share	$ 0.79	$ 0.55
Basic weighted average common shares outstanding	29,697,722	31,683,672
Diluted earnings per common share	$ 0.78	$ 0.55
Diluted weighted average common shares outstanding	29,860,730	32,094,828
Comprehensive income	$ 23,402	$ 17,553