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, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Selected Quarterly Financial Information [Line Items]
Net sales									$ 619,793	$ 584,954	$ 405,443
Cost of sales (exclusive of depreciation and amortization)									459,080	428,843	320,632
Income (loss) from continuing operations									25,364	(9,490)	(24,375)
Income from discontinued operations, net of tax									137,688	16,153	17,889
Comprehensive income (loss)									$ 175,903	$ (2,050)	$ (33,026)
Basic income (loss) from continuing operations per share									$ 0.92	$ (0.35)	$ (1.15)
Basic net income (loss) per share									5.94	0.25	(0.31)
Diluted income (loss) from continuing operations per share									0.91	(0.35)	(1.15)
Diluted net income (loss) per share									$ 5.87	$ 0.25	$ (0.31)
As Previously Reported [Member]
Selected Quarterly Financial Information [Line Items]
Net sales		$ 148,156	$ 225,875	$ 226,314	$ 202,029	$ 204,961	$ 214,272	$ 212,226
Cost of sales (exclusive of depreciation and amortization)		110,836	166,040	166,954	151,936	152,538	156,794	159,754		$ 621,022
Income (loss) from continuing operations		(2,930)	(21,529)	7,407	3,063	4,147	2,031	(1,299)		7,942	$ (7,431)
Income from discontinued operations, net of tax		135,825
Net income (loss)		132,895	(21,529)	7,407	3,063	4,147	2,031	(1,299)
Comprehensive income (loss)		$ 129,735	$ (12,289)	$ 12,113	$ (10,212)	$ 8,740	$ (973)	$ 4,418		$ 1,973	$ (31,951)
Basic income (loss) from continuing operations per share		$ (0.11)	$ (0.78)	$ 0.27	$ 0.11	$ 0.15	$ 0.08	$ (0.05)
Basic net income (loss) per share		4.82	(0.78)	0.27	0.11	0.15	0.08	(0.05)		$ 0.29	$ (0.35)
Diluted income (loss) from continuing operations per share		(0.11)	(0.78)	0.27	0.11	0.15	0.07	(0.05)
Diluted net income (loss) per share		$ 4.82	$ (0.78)	$ 0.27	$ 0.11	$ 0.15	$ 0.07	$ (0.05)		$ 0.29	$ (0.35)
Adjustment [Member]
Selected Quarterly Financial Information [Line Items]
Cost of sales (exclusive of depreciation and amortization)		$ 436		$ 485	$ 466	$ 91	$ 114	$ 144		$ 815
Income (loss) from continuing operations		(550)	$ 391	4	(1,512)	419	(172)	(14)		(1,279)	$ 945
Income from discontinued operations, net of tax		(6,384)
Net income (loss)		(6,934)	391	4	(1,512)	419	(172)	(14)
Comprehensive income (loss)		$ (6,606)	$ 662	$ 403	$ (90)	$ (2,938)	$ (1,879)	$ 884		$ (4,023)	$ (1,075)
Basic income (loss) from continuing operations per share		$ (0.02)	$ 0.01	$ 0.00	$ (0.06)	$ 0.02	$ (0.01)	$ 0.00
Basic net income (loss) per share		(0.25)	0.01	0.00	(0.06)	0.02	(0.01)	0.00		$ (0.05)	$ 0.04
Diluted income (loss) from continuing operations per share		(0.02)	0.01	0.00	(0.06)	0.02	(0.01)	0.00
Diluted net income (loss) per share		$ (0.25)	$ 0.01	$ 0.00	$ (0.06)	$ 0.02	$ (0.01)	$ 0.00		$ (0.05)	$ 0.04
Discontinued Operations [Member]
Selected Quarterly Financial Information [Line Items]
Net sales			$ (67,928)	$ (68,759)	$ (60,385)	$ (58,247)	$ (65,157)	$ (64,745)
Cost of sales (exclusive of depreciation and amortization)			(51,526)	(52,959)	(47,597)	(45,353)	(49,580)	(50,464)		$ (192,994)
Income (loss) from continuing operations			(5,236)	(5,518)	(3,737)	(3,622)	(4,326)	(4,468)		(16,153)	$ (17,889)
Income from discontinued operations, net of tax			$ 5,236	$ 5,518	$ 3,737	$ 3,622	$ 4,326	$ 4,468
Basic income (loss) from continuing operations per share			$ (0.19)	$ (0.20)	$ (0.14)	$ (0.13)	$ (0.16)	$ (0.17)
Diluted income (loss) from continuing operations per share			$ (0.19)	$ (0.20)	$ (0.14)	$ (0.13)	$ (0.16)	$ (0.17)
Continuing Operations As Revised [Member]
Selected Quarterly Financial Information [Line Items]
Net sales	$ 156,135	$ 148,156	$ 157,947	$ 157,555	$ 141,644	$ 146,714	$ 149,115	$ 147,481
Cost of sales (exclusive of depreciation and amortization)	118,814	111,272	114,514	114,480	104,805	107,276	107,328	109,434		428,843
Income (loss) from continuing operations	53,325	(3,480)	(26,374)	1,893	(2,186)	944	(2,467)	(5,781)		(9,490)	(24,375)
Income from discontinued operations, net of tax	(2,507)	129,441	5,236	5,518	3,737	3,622	4,326	44,687
Net income (loss)	50,818	125,961	(21,138)	7,411	1,551	4,566	1,859	(1,313)
Comprehensive income (loss)	$ 51,885	$ 123,129	$ (11,627)	$ 12,516	$ (10,302)	$ 5,802	$ (2,852)	$ 5,302		$ (2,050)	$ (33,026)
Basic income (loss) from continuing operations per share	$ 1.93	$ (0.13)	$ (0.96)	$ 0.07	$ (0.08)	$ 0.03	$ (0.09)	$ (0.22)
Basic net income (loss) per share	1.84	4.57	(0.77)	0.27	0.06	0.17	0.07	(0.05)		$ 0.25	$ (0.31)
Diluted income (loss) from continuing operations per share	1.91	(0.13)	(0.96)	0.07	(0.08)	0.03	(0.09)	(0.22)
Diluted net income (loss) per share	$ 1.82	$ 4.57	$ (0.77)	$ 0.27	$ 0.06	$ 0.17	$ 0.07	$ (0.05)		$ 0.25	$ (0.31)