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Stock-Based Compensation Plans (Details) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2019 USD ($) employee shares | Sep. 30, 2018 | Dec. 31, 2019 USD ($) employee shares | Dec. 31, 2018 | Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Financial Designation, Predecessor and Successor [Fixed List] | Successor | Successor | Successor | Predecessor | Successor | Successor | Predecessor
Percentage of performance modifier |  |  |  |  | 100.00% |  |
Number of employees impacted | employee |  |  | 54 |  | 54 |  |
Amount reclassified to members capital | $ |  |  | $ 20,718 |  | $ 19,100 |  |
Exercise period following a change in control |  |  |  |  | 15 days |  |
Maximum |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Percentage of performance modifier |  |  |  |  | 200.00% |  |
Minimum |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Percentage of performance modifier |  |  |  |  | 0.00% |  |
Equity-settled PRSUs |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Financial Designation, Predecessor and Successor [Fixed List] |  |  |  |  | Successor |  |
Equity settled PRSU's issued on conversion |  |  | 2,000,384 |  | 2,000,384 |  |
Cash-settled PRSUs |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Cash settled PRSU's converted |  |  |  |  | 1,033.2 |  |
Total fair value of vested PRSUs | $ |  |  |  |  | $ 17,200 |  |
Options |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Financial Designation, Predecessor and Successor [Fixed List] |  |  |  |  | Successor |  |
2019 Omnibus Equity Incentive Plan |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Number of shares authorized |  |  | 8,841,864 |  | 8,841,864 |  |
Cliff vesting period |  |  |  |  | 10 years |  |
Vesting period |  |  |  |  | 10 years |  |
Based solely on the passage of time | Options |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Vesting percentage |  |  |  |  |  | 50.00% |
If the Company achieves certain performance targets | Options |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Cliff vesting period |  |  |  |  |  | 4 years |
Vesting period |  |  |  |  |  | 4 years |

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