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Long-Term Debt (Tables) | 12 Months Ended
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Dec. 31, 2020
Debt Disclosure [Abstract] |
Schedule of Revolving Credit Facility and Long-Term Debt |
|  | December 31, |
|  | 2020 |  |  | 2019 |
|  | (In Thousands) |
Working Capital Revolver Loan, with a current interest rate of 3.75% (A) |  | $ | — |  |  | $ | — |
Senior Secured Notes due 2023 (B) |  |  | 435,000 |  |  |  | 435,000 |
Secured Promissory Note due 2021, with an interest rate of 5.25% (C) |  |  | 1,221 |  |  |  | 4,746 |
Unsecured Loan Agreement due 2022, with an interest rate of 1.00% (D) |  |  | 10,000 |  |  |  | — |
Secured Financing due 2023, with an interest rate of 8.32% (E) |  |  | 10,715 |  |  |  | 13,476 |
Secured Loan Agreement due 2025, with an interest rate of 8.75% (F) |  |  | 6,834 |  |  |  | 5,219 |
Secured Financing due 2025, with an interest rate of 8.75% (G) |  |  | 28,636 |  |  |  | — |
Secured Promissory Note due 2023 (G) |  |  | — |  |  |  | 12,705 |
Other |  |  | 432 |  |  |  | 159 |
Unamortized discount, net of premium and debt issuance costs |  |  | (8,648 | ) |  |  | (12,261 | )
|  |  | 484,190 |  |  |  | 459,044 |
Less current portion of long-term debt (H) |  |  | 16,801 |  |  |  | 9,410 |
Long-term debt due after one year, net (H) |  | $ | 467,389 |  |  | $ | 449,634 |
Schedule of Maturities of Long-Term Debt | 6. Long-Term Debt (continued) (H) Maturities of long-term debt for each of the five years after December 31, 2020 are as follows (in thousands):
2021 |  | $ | 16,893 |
2022 |  |  | 12,641 |
2023 |  |  | 446,291 |
2024 |  |  | 7,427 |
2025 |  |  | 9,586 |
Thereafter |  |  | — |
Less: Discount, net of premium, and debt issuance costs |  |  | 8,648 |
|  | $ | 484,190 |

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