Interim Financial Data (Unaudited) - Summary of Interim Financial Data (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Quarterly Financial Data [Abstract]
Net sales	$ 95,322	$ 106,168	$ 146,450	$ 131,676	$ 89,202	$ 94,023	$ 136,779	$ 120,800	$ 479,616	$ 440,804	$ 391,660
Gross profit	38,113	29,945	61,410	57,627	31,955	22,143	52,524	48,247	187,095	154,869	140,196
Net income	$ 12,629	$ 7,787	$ 23,725	$ 23,706	$ 8,086	$ 3,744	$ 18,715	$ 17,553	$ 67,847	$ 48,098	$ 41,521
Basic net income per share	$ 0.43	$ 0.27	$ 0.81	$ 0.80	$ 0.26	$ 0.12	$ 0.59	$ 0.55	$ 2.31	$ 1.53	$ 1.28
Basic weighted average common shares outstanding	29,318,915	29,295,284	29,264,362	29,697,722	30,766,943	31,227,643	31,735,333	31,683,672	29,394,559	31,350,542	32,319,649
Diluted net income per share	$ 0.43	$ 0.26	$ 0.80	$ 0.79	$ 0.26	$ 0.12	$ 0.58	$ 0.55	$ 2.29	$ 1.52	$ 1.27
Diluted weighted average common shares outstanding	29,543,842	29,516,718	29,477,870	29,910,292	30,966,682	31,537,010	32,142,939	32,094,828	29,612,669	31,682,509	32,751,074