Summary of Significant Accounting Policies - Employee Benefit Plans (Details) - USD ($) |
2 Months Ended | 10 Months Ended | 12 Months Ended | |
|---|---|---|---|---|
Dec. 31, 2016 |
Nov. 03, 2016 |
Dec. 31, 2017 |
Dec. 31, 2015 |
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Health care contributions, by the Company | $ 1,100,000 | $ 1,000,000 | ||
| Predecessor | ||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Health care contributions, by the Company | $ 1,100,000 | |||
| Successor | ||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Health care contributions, by the Company | $ 0 | |||
| Annual incentive compensation | $ 5,997,000 | 4,259,000 | ||
| Changes On Certain Ownership Levels | Successor | ||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Liability from incentive compensation | $ 600,000 | |||