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Net Income Per Share - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended | 15 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Nov. 02, 2016 | Dec. 31, 2015 | Jun. 30, 2015 | Apr. 30, 2013
Schedule Of Earnings Per Share [Line Items] |  |  |  |  |  |  |  |
Number of new common stock issued |  | 45,121,788 |  | 45,121,788 |  | 45,044,222 |  |
Warrants Repurchased Average Cost per Warrant |  |  |  | $ 8.10 |  |  |  |
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 |  | 136 | 236 |  |  |  |  |
Warrant exercised |  | 136 | 740 |  |  |  |  |
RemainingWarrantBuyBackAuthorizedDollars |  | $ 12,550 |  | $ 12,550 |  |  |  |
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 |  | 291,082 |  | 922,682 |  |  |  |
Warrants Purchased During Period Dollars |  | $ 2,104 | $ 5,017 | $ 7,478 |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights |  |  |  |  |  |  |  | 5,047,138
Warrants outstanding |  | 4,116,319 |  | 4,116,319 |  |  |  |
SecondWarrantBuyBackAuthorizedDollars |  |  |  |  | $ 10,000 |  |  |
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 | 143,334 | 110,000 |  |  |  |  |
Warrants [Member] | Successor [Member] |  |  |  |  |  |  |  |
Schedule Of Earnings Per Share [Line Items] |  |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 4,461,637 |  |  |  |  |  |  |
Restricted Stock Units (RSUs) [Member] | Successor [Member] |  |  |  |  |  |  |  |
Schedule Of Earnings Per Share [Line Items] |  |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 78,460 | 23,334 |  |  |  |  |  |
Performance Shares [Member] | Successor [Member] |  |  |  |  |  |  |  |
Schedule Of Earnings Per Share [Line Items] |  |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 96,349 |  |  |  |  |  |  |

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