Earnings Per Share - Schedule of Computation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016		Dec. 31, 2015		Dec. 31, 2014
Earnings Per Share [Abstract]
Net income (loss)	$ (2,353)	$ 36,742	$ 12,933	$ 16,530	$ (95,836)	$ 27,667	$ 29,834	$ (6,007)	$ 63,852	[1]	$ (44,342)	[1]	$ 112,115	[1]
Denominator for basic earnings per share - weighted average shares									36,580		37,457		38,705	[1]
Effect of dilutive securities: Employee stock options and restricted units									338				425
Denominator for diluted earnings per share - Adjusted weighted average shares and the effect of dilutive securities									36,918		37,457		39,130	[1]
Net income (loss) per share - basic	$ (0.06)	$ 1.00	$ 0.35	$ 0.45	$ (2.61)	$ 0.74	$ 0.79	$ (0.16)	$ 1.75		$ (1.18)		$ 2.90	[1]
Net income (loss) per share - diluted	$ (0.06)	$ 0.99	$ 0.35	$ 0.45	$ (2.61)	$ 0.74	$ 0.78	$ (0.16)	$ 1.73		$ (1.18)		$ 2.87	[1]

[1] Revised in 2015 for the impact of the changes in accounting principle related to inventory accounting.