Schedule I - Condensed Statements of Cash Flows (Detail) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended												12 Months Ended
	Jan. 31, 2015	Dec. 31, 2016		Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016		Dec. 31, 2015		Sep. 30, 2015	Jun. 30, 2015	[4]	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash Flows From Operating Activities:
Net (loss) income		$ (11,905)	[1]	$ 65,655	$ 17,768	$ (84,049)	[2]	$ (11,028)	[3]	$ 97,950	$ 5,809		$ (43,598)	$ (12,531)	$ 49,133	$ 49,919
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Net cash provided by operating activities														280,412	286,274	261,532
Cash Flows From Investing Activities:
Net cash used in investing activities														(160,286)	(157,377)	(156,546)
Cash Flows From Financing Activities:
Purchase of treasury stock	$ (5,650)														(50,650)	(60,058)
Dividend paid to common stockholders														(65,306)	(72,318)	(72,113)
Net cash used in financing activities														(70,139)	(153,832)	(177,921)
Change in Cash and Cash Equivalents														49,987	(24,935)	(72,935)
Cash and Cash Equivalents—Beginning of period	43,906					18,971								18,971	43,906	116,841
Cash and Cash Equivalents—End of period		68,958						18,971						68,958	18,971	43,906
Supplemental Disclosures of Noncash Investing and Financing Activities
Dividends declared, but unpaid		908						430						908	430	172
Treasury stock purchases settled in January 2015																5,650
Parent Company [Member]
Cash Flows From Operating Activities:
Net (loss) income														(12,531)	49,133	49,919
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Equity in net (loss) income of subsidiary														12,531	(49,133)	(49,919)
Dividend received from subsidiary-return on capital (net of forfeitures)														26,412	36,196	36,056
Net cash provided by operating activities														26,412	36,196	36,056
Cash Flows From Investing Activities:
Restricted payment from subsidiary															45,000	65,708
Dividend received from subsidiary-return of capital (net of forfeitures)														39,372	36,381	36,056
Net cash used in investing activities														39,372	81,381	101,764
Cash Flows From Financing Activities:
Purchase of treasury stock	(5,650)														(50,650)	(60,058)
Dividend paid to common stockholders														(65,306)	(72,318)	(72,113)
(Payment) receipt of cash for tax withholdings on equity-based compensation															(37)	37
Net cash used in financing activities														(65,306)	(123,005)	(132,134)
Change in Cash and Cash Equivalents														478	(5,428)	5,686
Cash and Cash Equivalents—Beginning of period	$ 5,858					$ 430								430	5,858	172
Cash and Cash Equivalents—End of period		908						430						908	430	5,858
Supplemental Disclosures of Noncash Investing and Financing Activities
Dividends declared, but unpaid		$ 908						$ 430						$ 908	$ 430	172
Treasury stock purchases settled in January 2015																$ 5,650

[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.