(Loss) Earnings per Share - Schedule of (Loss) Earnings per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2016	[1]	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	[2]	Dec. 31, 2015	[3]	Sep. 30, 2015	Jun. 30, 2015	[4]	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Earnings Per Share [Abstract]
Basic (loss) earnings per share, Net (Loss) Income													$ (12,531)	$ 49,133	$ 49,919
Diluted (loss) earnings per share, Net (Loss) Income													$ (12,531)	$ 49,133	$ 49,919
Basic (loss) earnings per share, Shares													84,925	85,860	87,183
Effect of dilutive incentive-based awards, Shares														121	297
Diluted (loss) earnings per share, Shares													84,925	85,981	87,480
Basic (loss) earnings per share, Per Share Amount	$ (0.14)		$ 0.77	$ 0.21	$ (1.00)		$ (0.13)		$ 1.14	$ 0.07		$ (0.51)	$ (0.15)	$ 0.57	$ 0.57
Diluted (loss) earnings per share, Per Share Amount	$ (0.14)		$ 0.77	$ 0.21	$ (1.00)		$ (0.13)		$ 1.14	$ 0.07		$ (0.51)	$ (0.15)	$ 0.57	$ 0.57

[1] During the fourth quarter of 2016, the Company recorded $8,904 in restructuring and other related costs primarily related to severance costs and other employment expenses. See Note 4–Restructuring Programs and Separation Costs for further details.

[2] During the first quarter of 2016, the Company recorded $27,516 in equity compensation expense related to certain of the Company’s performance-vesting restricted shares (the “2.25x Performance Restricted shares”) which became probable of vesting during the first quarter and vested on April 1, 2016. See Note 18–Equity-Based Compensation for further details.

[3] During the fourth quarter of 2015, the Company recorded $2,001 in restructuring and other related costs primarily related to severance costs for certain positions which were eliminated as part of a cost savings initiative. See Note 4–Restructuring Programs and Separation Costs for further details.

[4] During the second quarter of 2015, the Company recorded $20,348 in loss on early extinguishment of debt and write-off of discounts and debt issuance costs related to the early redemption of $260,000 of its then existing Senior Notes. See Note 11–Long-Term Debt for further details.