Net Income Per Share - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Apr. 30, 2013
Schedule Of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	110,000
Number of new common stock issued	45,006,057	45,005,932
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
Exercise price of common stock			$ 16.67
Investment Warrants Expiration Date		Apr. 30, 2023
Warrant exercised	125
Common stock shares issued	125
Warrants outstanding	5,039,752
Successor [Member]
Schedule Of Earnings Per Share [Line Items]
Number of new common stock issued			45,000,000
Class of Warrant or Right, Number of Securities Called by Warrants or Rights			5,047,138