Net Income Per Share - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		4 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Apr. 30, 2013	Dec. 31, 2017	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
Successor [Member]
Schedule Of Earnings Per Share [Line Items]
Number of new common stock issued							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
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	194	0
First Warrant Buyback Authorization Dollars						$ 10,000
Warrant exercised	194	0
Warrants outstanding	4,053,476
SecondWarrantBuyBackAuthorizedDollars					$ 10,000
Warrants Purchased Shares	985,331
Payments for Repurchase of Warrants	$ 8,092