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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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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of convertible preferred stock using the if-converted method.

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