Net Income Per Share - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	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
RemainingWarrantBuyBackAuthorizedDollars	$ 11,939
Successor [Member]
Schedule Of Earnings Per Share [Line Items]
Common stock, shares outstanding	45,332,214
Par value of common stock issued	$ 0.01		$ 0.01
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