Quarterly Financial Results - Schedule of Selected Consolidated Statements of Operations (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 167,652	$ 194,332	$ 172,070	$ 164,164	$ 175,510	$ 170,812	$ 193,533	$ 194,322	$ 698,218	$ 734,177	$ 807,336
Gross profit	34,498	42,630	35,457	40,277	17,179	34,413	45,241	58,235	152,862	155,068	243,247
Operating income (loss)	(30,409)	(19,482)	(19,348)	(7,887)	(33,179)	(10,220)	2,665	13,966	(77,126)	(26,768)	84,315
Net income (loss)	$ (63,830)	$ (46,807)	$ 15,010	$ (21,605)	$ (22,197)	$ 251	$ (24,668)	$ (17,589)	$ (117,232)	$ (64,203)	$ 110,038
Earnings (loss) per share:
Basic	$ (1.87)	$ (1.37)	$ 0.44	$ (0.63)	$ (0.64)	$ 0.01	$ (0.70)	$ (0.49)	$ (3.44)	$ (1.82)	$ 3.01
Diluted	$ (1.87)	$ (1.37)	$ 0.43	$ (0.63)	$ (0.64)	$ 0.01	$ (0.70)	$ (0.49)	$ (3.44)	$ (1.82)	$ 2.93
Weighted average common stock outstanding:
Basic	34,056,413	34,056,359	34,056,359	34,052,875	34,480,849	35,443,820	35,474,001	35,539,413	34,055,513	35,232,194	36,567,684
Diluted	34,056,413	34,056,359	35,177,915	34,052,875	34,480,849	37,484,601	35,474,001	35,539,413	34,055,513	35,232,194	37,533,391