Net Income Per Share - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Sep. 30, 2015	Dec. 31, 2014	Dec. 31, 2015	Apr. 30, 2013
Schedule Of Earnings Per Share [Line Items]
Number of new common stock issued	45,047,686		45,047,686			45,044,222
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
Exercise price of common stock							$ 16.67
Investment Warrants Expiration Date					Apr. 30, 2023
Common stock shares issued	0	125
Warrant exercised	0	125
Successor [Member]
Schedule Of Earnings Per Share [Line Items]
Number of new common stock issued							45,000,000
WarrantBuyBackAuthorizedDollars				$ 10,000
Warrants Purchased During Period Shares			631,600
Warrants Purchased During Period Dollars			$ 5,375
Class of Warrant or Right, Number of Securities Called by Warrants or Rights							5,047,138
Warrants outstanding	4,407,537		4,407,537
Employee Stock Option [Member] | Successor [Member]
Schedule Of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	176,668	110,000
Warrants [Member] | Successor [Member]
Schedule Of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	4,407,537
Restricted Stock Units (RSUs) [Member] | Successor [Member]
Schedule Of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	51,992
Performance Shares [Member] | Successor [Member]
Schedule Of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	263,988