Schedule I - Condensed Balance Sheets (Detail) - USD ($) $ in Thousands		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current assets:
Total current assets		$ 118,775	$ 153,692
Total assets		2,085,782	2,378,771
Current liabilities:
Dividends payable		470	908
Total current liabilities		253,470	263,612
Total liabilities		1,798,316	1,917,556
Commitments and contingencies
Stockholders’ Equity:
Preferred stock, $0.01 par value—authorized, 100,000,000 shares, no shares issued or outstanding at December 31, 2017 and 2016
Common stock, $0.01 par value—authorized, 1,000,000,000 shares; 92,637,403 and 91,861,054 shares issued at December 31, 2017 and 2016, respectively		926	919
Additional paid-in capital		641,324	621,343
Accumulated other comprehensive loss		(5,076)	(13,694)
(Accumulated deficit) retained earnings		(194,837)	7,518
Treasury stock, at cost (6,519,773 shares at December 31, 2017 and 2016)		(154,871)	(154,871)	$ (154,871)
Total stockholders’ equity		287,466	461,215	504,120	$ 579,535
Total liabilities and stockholders’ equity		2,085,782	2,378,771
Parent Company [Member]
Current assets:
Cash		470	908
Total current assets		470	908
Investment in wholly owned subsidiary	[1]	287,466	461,215
Total assets		287,936	462,123
Current liabilities:
Dividends payable		470	908
Total current liabilities		470	908
Total liabilities		470	908
Commitments and contingencies
Stockholders’ Equity:
Preferred stock, $0.01 par value—authorized, 100,000,000 shares, no shares issued or outstanding at December 31, 2017 and 2016
Common stock, $0.01 par value—authorized, 1,000,000,000 shares; 92,637,403 and 91,861,054 shares issued at December 31, 2017 and 2016, respectively		926	919
Additional paid-in capital		641,324	621,343
Accumulated other comprehensive loss	[1]	(5,076)	(13,694)
(Accumulated deficit) retained earnings		(194,837)	7,518
Treasury stock, at cost (6,519,773 shares at December 31, 2017 and 2016)		(154,871)	(154,871)	$ (154,871)
Total stockholders’ equity		287,466	461,215
Total liabilities and stockholders’ equity		$ 287,936	$ 462,123

[1] The 2016 parent company only condensed balance sheet reflects a correction to record accumulated other comprehensive loss which had previously been omitted. The correction of this immaterial omission reduced the previously reported investment in wholly owned subsidiary and total stockholders’ equity at December 31, 2016 by $13,694. The correction did not impact the Company’s consolidated financial statements for any periods presented.