Net Income Per Share - Reconciliation of Common Shares Used for Basic and Diluted Earnings Per Share (Detail) - Successor [Member] - shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Weighted average number of common shares and potential dilutive shares used for diluted earnings per share	45,723,524	46,006,027	46,933,253
Weighted average number of common shares used for basic earnings per share	45,212,414	45,173,542	45,093,304
Warrant [Member]
Effect of potential dilutive shares:
Effect of potential dilutive shares	312,619	809,834	1,786,804
Employee Stock Option [Member]
Effect of potential dilutive shares:
Effect of potential dilutive shares	447	5,313	9,807
Restricted Stock Units (RSUs) [Member]
Effect of potential dilutive shares:
Effect of potential dilutive shares	116,105	14,221	37,812
Performance Shares [Member]
Effect of potential dilutive shares:
Effect of potential dilutive shares	81,939	3,117	5,526
Employee Stock Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	110,000