Net Income Per Share - Additional Information (Detail) - USD ($)	4 Months Ended	12 Months Ended			18 Months Ended
	Apr. 30, 2013	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2016	Nov. 02, 2016	May 01, 2013
Schedule Of Earnings Per Share [Line Items]
Number of new common stock issued	45,000,000
Par value of common stock issued	$ 0.01
Exercise price of common stock	$ 16.67
Investment Warrants Expiration Date	Apr. 30, 2023
RemainingWarrantBuyBackAuthorizedDollars		$ 11,939,000			$ 11,939,000
Successor [Member]
Schedule Of Earnings Per Share [Line Items]
Number of new common stock issued		45,194,954	45,044,222		45,194,954		45,000,000
Par value of common stock issued		$ 0.01	$ 0.01		$ 0.01		$ 0.01
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	5,047,138						5,047,138
Exercise price of common stock							$ 16.67
Warrant exercised		136	740	949
Stock Issued During Period, Shares, New Issues		136	236	949
Warrants outstanding		4,053,670			4,053,670
WarrantBuyBackAuthorizedDollars			$ 10,000,000
Warrants Purchased During Period Shares					985,331
Payments for Repurchase of Warrants		$ 2,717,000	$ 5,375,000	$ 0	$ 8,092,000
SecondWarrantBuyBackAuthorizedDollars						$ 10,000,000