Schedule I - Condensed Balance Sheets (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current assets:
Total current assets	$ 153,692	$ 106,082
Total assets	2,378,771	2,388,662
Current liabilities:
Dividends payable	908	430	$ 172
Total current liabilities	263,612	229,314
Total liabilities	1,917,556	1,884,542
Commitments and contingencies
Stockholders’ Equity:
Preferred stock, $0.01 par value—authorized, 100,000,000 shares, no shares issued or outstanding at December 31, 2016 and 2015
Common stock, $0.01 par value—authorized, 1,000,000,000 shares; 91,861,054 and 90,320,374 shares issued at December 31, 2016 and 2015, respectively	919	903
Additional paid-in capital	621,343	624,765
Retained earnings	7,518	46,460
Treasury stock, at cost (6,519,773 shares at December 31, 2016 and 2015)	(154,871)	(154,871)	(109,871)
Total stockholders’ equity	461,215	504,120	579,535	$ 648,027
Total liabilities and stockholders’ equity	2,378,771	2,388,662
Parent Company [Member]
Current assets:
Cash	908	430
Total current assets	908	430
Investment in wholly owned subsidiary	474,909	517,257
Total assets	475,817	517,687
Current liabilities:
Dividends payable	908	430	172
Total current liabilities	908	430
Total liabilities	908	430
Commitments and contingencies
Stockholders’ Equity:
Preferred stock, $0.01 par value—authorized, 100,000,000 shares, no shares issued or outstanding at December 31, 2016 and 2015
Common stock, $0.01 par value—authorized, 1,000,000,000 shares; 91,861,054 and 90,320,374 shares issued at December 31, 2016 and 2015, respectively	919	903
Additional paid-in capital	621,343	624,765
Retained earnings	7,518	46,460
Treasury stock, at cost (6,519,773 shares at December 31, 2016 and 2015)	(154,871)	(154,871)	$ (109,871)
Total stockholders’ equity	474,909	517,257
Total liabilities and stockholders’ equity	$ 475,817	$ 517,687