Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Statement [Abstract]
Net sales	$ 106,168	$ 94,023	$ 384,294	$ 351,602
Cost of sales	76,223	71,880	235,312	228,688
Gross profit	29,945	22,143	148,982	122,914
Selling, general and administrative expenses	19,379	15,698	64,786	58,763
Income from operations	10,566	6,445	84,196	64,151
Interest expense, net	77	157	1,108	482
Income before income taxes	10,489	6,288	83,088	63,669
Provision for income taxes	3,591	2,544	29,510	23,657
Net income	$ 6,898	$ 3,744	$ 53,578	$ 40,012
Basic earnings per common share	$ 0.24	$ 0.12	$ 1.82	$ 1.27
Basic weighted average common shares outstanding	29,295,284	31,227,643	29,419,958	31,547,212
Diluted earnings per common share	$ 0.23	$ 0.12	$ 1.81	$ 1.25
Diluted weighted average common shares outstanding	29,457,653	31,537,010	29,581,578	31,923,255
Comprehensive income	$ 6,898	$ 3,744	$ 53,578	$ 40,012