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Net Income Per Share - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands | 4 Months Ended | 6 Months Ended | 24 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Apr. 30, 2013 | Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Dec. 31, 2016 | Nov. 02, 2016 | Jun. 30, 2015 | May 01, 2013
Schedule Of Earnings Per Share [Line Items] |  |  |  |  |  |  |  |
Warrants Repurchased Average Cost per Warrant |  |  |  | $ 8.21 |  |  |  |
Investment Warrants Expiration Date | Apr. 30, 2023 |  |  |  |  |  |  |
RemainingWarrantBuyBackAuthorizedDollars |  | $ 11,939 |  | $ 11,939 |  |  |  |
Successor [Member] |  |  |  |  |  |  |  |
Schedule Of Earnings Per Share [Line Items] |  |  |  |  |  |  |  |
Number of new common stock issued |  | 45,275,982 |  | 45,275,982 | 45,194,954 |  |  | 45,000,000
Warrants Purchased During Period Shares |  | 0 |  |  |  |  |  |
Warrants Purchased During Period Dollars |  | $ 0 |  |  |  |  |  |
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 |  |  |  |  |  |  | 5,047,138
Exercise price of common stock |  |  |  |  |  |  |  | $ 16.67
Common stock shares issued |  | 0 | 136 |  |  |  |  |
First Warrant Buyback Authorization Dollars |  |  |  |  |  |  | $ 10,000 |
Warrant exercised |  | 0 | 136 |  |  |  |  |
Warrants outstanding |  | 4,053,670 |  | 4,053,670 |  |  |  |
SecondWarrantBuyBackAuthorizedDollars |  |  |  |  |  | $ 10,000 |  |
Warrants Purchased Shares |  |  |  | 985,331 |  |  |  |
Payments for Repurchase of Warrants |  | $ 0 | $ 1,610 | $ 8,092 |  |  |  |

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