Quarterly Financial Data (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Quarterly Financial Information [Line Items]
Net sales	$ 133,507	$ 314,491	$ 145,359	$ 73,405	$ 141,079	$ 332,419	$ 131,930	$ 72,323	$ 666,762	$ 677,751	$ 747,268
Gross profit	30,766	96,712	46,893	23,566	18,987	105,670	45,092	24,271	197,937	193,990	244,950
Income (loss) from operations	(31,215)	37,296	107	(19,410)	(35,996)	50,068	1,998	(14,790)	(13,222)	1,280	50,197
Income (loss) before provision (benefit) for income taxes	(34,171)	36,426	288	(21,192)	(37,990)	48,081	6,087	(16,716)	(18,649)	(538)	49,742
Net income (loss)	$ (119,457)	$ 30,443	$ 214	$ (16,000)	$ (20,018)	$ 34,825	$ 4,240	$ (10,575)	$ (104,800)	$ 8,472	$ 47,049
Basic earnings (loss) per share	$ (5.45)	$ 1.38	$ 0.01	$ (0.62)	$ (0.77)	$ 1.32	$ 0.16	$ (0.39)	$ (4.37)	$ 0.32	$ 1.71
Weighted average shares outstanding	21,923	22,110	25,765	25,831	25,839	26,476	26,948	27,217	23,963	26,760	27,491
Diluted earnings (loss) per share	$ (5.45)	$ 1.10	$ 0.01	$ (0.62)	$ (0.77)	$ 1.10	$ 0.16	$ (0.39)	$ (4.37)	$ 0.32	$ 1.52
Weighted average shares and equivalents outstanding	21,923	28,933	25,870	25,831	25,839	32,922	27,096	27,217	23,963	26,893	34,513