Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Preferred Stock [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Preferred Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Preferred Stock, Shares Authorized	25,000,000	25,000,000
Preferred Stock - Shares Issued	0	0
Preferred Stock - Shares Outstanding	0	0
Common Stock [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Common Stock, Shares Authorized	300,000,000	300,000,000
Common Stock, Shares, Issued	97,146,687	96,073,197
Common Stock, Shares, Outstanding	97,139,716	96,066,226
Treasury Stock [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Treasury Stock, Shares	6,971	6,971
8.30% 2022 Notes [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Debt Issuance Costs, Net	$ 768	$ 1,179
Long-term Debt [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Debt Issuance Costs, Net	13,761	15,098
Capital Lease Obligations [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Debt Issuance Costs, Net	$ 6,181	$ 3,936

Face amount or stated value per share of common stock.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

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Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt.

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Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased.

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Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

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