Quarterly Results of Operations (Unaudited) - Summary of Unaudited Quarterly Results of Operations (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 199,477	$ 205,683	$ 196,349	$ 169,148	$ 156,135	$ 148,156	$ 157,947	$ 157,555	$ 770,657	$ 619,793	$ 584,954
Cost of sales (exclusive of depreciation and amortization)	156,713	156,408	148,640	126,444	118,814	111,272	114,514	114,480	588,205	459,080	428,843
Income (loss) from continuing operations	(220,189)	(13,784)	(24,511)	(5,983)	53,325	(3,480)	(26,374)	1,893	(264,467)	25,364	(9,490)
Income from discontinued operations, net of tax					(2,507)	129,441	5,236	5,518	0	137,688	16,153
Net income (loss)	(220,189)	(13,784)	(24,511)	(5,983)	50,818	125,961	(21,138)	7,411
Comprehensive income (loss)	$ (219,560)	$ (17,977)	$ (40,292)	$ (518)	$ 51,885	$ 123,129	$ (11,627)	$ 12,516	$ (278,347)	$ 175,903	$ (2,050)
Basic income (loss) from continuing operations per share (in usd per share)	$ (5.25)	$ (0.48)	$ (0.89)	$ (0.22)	$ 1.93	$ (0.13)	$ (0.96)	$ 0.07	$ (8.35)	$ 0.92	$ (0.35)
Basic net income (loss) per share (in usd per share)	(5.25)	(0.48)	(0.89)	(0.22)	1.84	4.57	(0.77)	0.27	(8.35)	5.94	0.25
Diluted income (loss) from continuing operations per share (in usd per share)	(5.25)	(0.48)	(0.89)	(0.22)	1.91	(0.13)	(0.96)	0.07	(8.35)	0.91	(0.35)
Diluted net income (loss) per share (in usd per share)	$ (5.25)	$ (0.48)	$ (0.89)	$ (0.22)	$ 1.82	$ 4.57	$ (0.77)	$ 0.27	$ (8.35)	$ 5.87	$ 0.25