Business, Basis of Presentation and Significant Accounting Policies - Summary of Consolidated Statement of Operations Line Items, which Reflect Adoption of New Revenue Recognition Guidance (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net sales	$ 199,685	$ 166,685	$ 365,504	$ 328,395
Cost of sales	145,831	120,023	267,069	240,163
Gross profit	53,854	46,662	98,435	88,232
Operating income	13,914	9,742	21,293	16,109
Income (loss) before income tax expenses	(19,984)	(7,521)	(16,231)	37,070
Net income (loss)	$ (21,505)	$ (8,059)	$ (18,742)	$ 35,679
Earnings (loss) per common share-
Basic	$ (0.62)	$ (0.24)	$ (0.55)	$ 1.06
Diluted	$ (0.62)	$ (0.24)	$ (0.55)	$ 0.87
Adjustments [Member] | Accounting Standards Update 2014-09 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net sales	$ (1,526)		$ (887)
Cost of sales	(2,070)		(2,010)
Gross profit	544		1,123
Operating income	544		1,123
Income (loss) before income tax expenses	544		1,123
Net income (loss)	$ 544		$ 1,123
Earnings (loss) per common share-
Basic	$ 0.02		$ 0.03
Diluted	$ 0.02		$ 0.03
Amounts Without Adoption of the New Revenue Standard [Member] | Accounting Standards Update 2014-09 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net sales	$ 201,211		$ 366,391
Cost of sales	147,901		269,079
Gross profit	53,310		97,312
Operating income	13,370		20,170
Income (loss) before income tax expenses	(20,528)		(17,354)
Net income (loss)	$ (22,049)		$ (19,865)
Earnings (loss) per common share-
Basic	$ (0.64)		$ (0.58)
Diluted	$ (0.64)		$ (0.58)