Net Income Per Share - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	4 Months Ended	6 Months Ended		24 Months Ended
	Apr. 30, 2013	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Dec. 31, 2016	Nov. 02, 2016	Jun. 30, 2015	May 01, 2013
Schedule Of Earnings Per Share [Line Items]
Warrants Repurchased Average Cost per Warrant				$ 8.21
Investment Warrants Expiration Date	Apr. 30, 2023
RemainingWarrantBuyBackAuthorizedDollars		$ 11,939		$ 11,939
Successor [Member]
Schedule Of Earnings Per Share [Line Items]
Number of new common stock issued		45,275,982		45,275,982	45,194,954			45,000,000
Warrants Purchased During Period Shares		0
Warrants Purchased During Period Dollars		$ 0
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
Common stock shares issued		0	136
First Warrant Buyback Authorization Dollars							$ 10,000
Warrant exercised		0	136
Warrants outstanding		4,053,670		4,053,670
SecondWarrantBuyBackAuthorizedDollars						$ 10,000
Warrants Purchased Shares				985,331
Payments for Repurchase of Warrants		$ 0	$ 1,610	$ 8,092