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Earnings Per Share - Narrative (Details) - USD ($) $ in Thousands |  |  | 1 Months Ended | 2 Months Ended | 10 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
Jul. 26, 2018 | Feb. 28, 2017 | Jul. 31, 2018 | Feb. 28, 2017 | Dec. 31, 2017 | Dec. 31, 2019 | Dec. 31, 2018 | Mar. 31, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |  |  |  |
Weighted-average shares of common stock outstanding (in shares) |  |  |  |  | 38,644,000 | 81,379,000 | 57,743,000 |
Common stock reserved to settle claims of unsecured creditors (in shares) |  | 7,080,000 |  |  | 7,080,000 |  | 7,080,000 |
Shares issued to settle claims (in shares) |  |  |  |  |  |  |  | 2,770,000
Series A preferred stock dividends and conversion to common stock |  |  | $ 87,000 |  | $ 18,248 | $ 0 | $ 97,942 |
Cash payment to preferred stockholders |  |  | 60,000 | $ 0 | $ 0 | $ 0 | $ 60,273 |
Incremental common shares attributable to dilutive effect of preferred stock (in shares) |  |  |  |  | 0 | 0 | 0 |
Series A Preferred Stock Conversion and Common Stock Offering |  |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |  |  |  |
Sale of stock, consideration received | $ 27,000 |  | $ 27,000 |  |  |  |  |
Over-allotment option |  |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |  |  |  |
Additional common shares received by preferred stockholders (in shares) | 1,900,000 |  | 1,900,000 |  |  |  |  |
Restricted Stock Units (RSUs) and Performance-based Restricted Stock Units (PSUs) |  |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |  |  |  |
Incremental common shares attributable to dilutive effect of preferred stock (in shares) |  |  |  |  |  | 572,000 |  |
Restricted Stock Units (RSUs) |  |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |  |  |  |
Incremental common shares attributable to dilutive effect of share-based payment arrangements (in shares) |  |  |  | 0 | 0 |  | 189,000 |
Performance-based Restricted Stock Units (PSUs) |  |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |  |  |  |
Incremental common shares attributable to dilutive effect of share-based payment arrangements (in shares) |  |  |  |  |  |  | 0 |
Common Stock |  |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |  |  |  |
Issuance of shares (in shares) |  | 32,920,000 |  |  |  |  |  |

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