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Quarterly Financial Information - Quarterly Results of Operations (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
Selected Quarterly Financial Information [Abstract]
Net sales	$ 86,433	$ 88,299	$ 83,220	$ 78,682	$ 91,961	$ 89,046	$ 87,869	$ 85,790	$ 336,634	$ 354,666	$ 388,185
Gross profit	29,464	28,855	26,806	24,289	26,089	26,159	26,444	24,760	109,414	103,452	120,948
Income (loss) before income taxes	6,990	6,534	3,773	3,656	5,158	2,141	4,466	(59)	20,953	11,706	21,410
Net income (loss)	$ 5,100	$ 4,742	$ 2,755	$ 2,658	$ 3,045	$ 206	$ 3,680	$ (256)	$ 15,255	$ 6,675	$ 12,861
Net income (loss), basic	$ 1.00	$ 0.92	$ 0.53	$ 0.51	$ 0.58	$ 0.04	$ 0.68	$ (0.05)	$ 2.95	$ 1.25	$ 2.39
Net income (loss), diluted	$ 0.99	$ 0.92	$ 0.53	$ 0.51	$ 0.58	$ 0.04	$ 0.68	$ (0.05)	$ 2.95	$ 1.24	$ 2.39

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