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Emergence from Voluntary Reorganization under Chapter 11 - Narrative (Details)	Nov. 19, 2020 shares
Debt Instrument [Line Items]
Warrants to purchase of number of shares (in shares)	1,621,622
Long Term Incentive Plan (LTIP)
Debt Instrument [Line Items]
Number of shares available for grant (in shares)	2,402,402
Unsecured Debt
Debt Instrument [Line Items]
Issued of common stock (in shares)	20,000,000
Senior Unsecured Notes Due 2021 | Unsecured Debt
Debt Instrument [Line Items]
Stated interest rate (as a percent)	6.50%
Senior Unsecured Notes Due 2022 | Unsecured Debt
Debt Instrument [Line Items]
Stated interest rate (as a percent)	6.875%
Senior Unsecured Notes Due 2023 | Unsecured Debt
Debt Instrument [Line Items]
Stated interest rate (as a percent)	6.875%
Senior Unsecured Notes Due 2026 | Unsecured Debt
Debt Instrument [Line Items]
Stated interest rate (as a percent)	6.25%
Senior Unsecured Convertible Notes Due 2023 | Senior Convertible Notes
Debt Instrument [Line Items]
Stated interest rate (as a percent)	2.625%

X

- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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Number of shares authorized for issuance under share-based payment arrangement.

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Number of shares of stock issued as of the balance sheet date, including shares that had been issued and were previously outstanding but which are now held in the treasury.

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