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Long-Term Debt (Details) - USD ($) | 1 Months Ended | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Feb. 28, 2021 | Aug. 31, 2020 | Mar. 31, 2020 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Jul. 16, 2021 | Jul. 15, 2021 | Dec. 31, 2016 | Apr. 30, 2014 | Feb. 28, 2013
Debt Instrument |  |  |  |  |  |  |  |  |  |  |
Repayments of long-term debt |  |  |  | $ 333,790,000 | $ 333,637,000 | $ 724,000,000 |  |  |  |  |
Total long-term debt |  |  |  | 498,871,000 | 513,387,000 |  |  |  |  |  |
Less: current portion |  |  |  | 0 | (28,790,000) |  |  |  |  |  |
Total long-term debt, net of current portion |  |  |  | 498,871,000 | 484,597,000 |  |  |  |  |  |
Current installments of finance lease obligations |  |  |  | 280,000 | 2,707,000 |  |  |  |  |  |
Finance lease obligations |  |  |  | 9,000 | 289,000 |  |  |  |  |  |
Total finance lease obligations |  |  |  | $ 289,000 | 2,996,000 |  |  |  |  |  |
Applicable margins (percent) |  |  |  | 4.00% |  |  |  |  |  |  |
Gain on retirement of senior unsecured notes |  |  |  | $ 0 | 3,484,000 | $ 0 |  |  |  |  |
Revolving Loan Facility |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  | $ 275,000,000 |  |  | $ 275,000,000 | $ 300,000,000 |  |  |
Weighted average interest rate |  |  |  | 5.00% |  |  |  |  |  |  |
Unamortized debt issuance costs |  |  |  | $ 2,613,000 | 3,826,000 |  |  |  |  |  |
Total long-term debt |  |  |  | $ 156,887,000 | 144,174,000 |  |  |  |  |  |
Revolving Loan Facility | LIBOR |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |
Interest rate floor (percent) |  |  |  | 1.00% |  |  |  |  |  |  |
Revolving Loan Facility | Minimum | LIBOR |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |
Applicable margins (percent) |  |  |  | 2.75% |  |  |  |  |  |  |
Revolving Loan Facility | Minimum | Prime Rate |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |
Applicable margins (percent) |  |  |  | 1.75% |  |  |  |  |  |  |
Revolving Loan Facility | Maximum | LIBOR |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |
Applicable margins (percent) |  |  |  | 4.00% |  |  |  |  |  |  |
Revolving Loan Facility | Maximum | Prime Rate |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |
Applicable margins (percent) |  |  |  | 3.00% |  |  |  |  |  |  |
Senior Notes | Senior Notes 7.250% |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |
Unamortized debt issuance costs |  |  |  | $ 0 | 0 |  |  |  |  |  |
Face amount |  |  |  | $ 400,000,000 |  |  |  |  |  | $ 150,000,000 | $ 250,000,000
Fixed rate cost |  |  |  | 7.25% |  |  |  |  |  |  |
Unamortized premium |  |  |  | $ 0 | 344,000 |  |  |  |  |  |
Amount of debt repurchased |  |  | $ 9,344,000 | 9,344,000 |  |  |  |  | $ 26,200,000 |  |
Debt refinanced |  | $ 335,666,000 |  |  |  |  |  |  |  |  |
Repayments of long-term debt | $ 28,790,000 |  |  |  |  |  |  |  |  |  |
Total long-term debt |  |  |  | 0 | 28,790,000 |  |  |  |  |  |
Gain on retirement of senior unsecured notes |  |  | $ 3,484,000 |  |  |  |  |  |  |  |
Senior Notes | 2024 Notes |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |
Unamortized debt issuance costs |  |  |  | 2,433,000 | 3,577,000 |  |  |  |  |  |
Face amount |  |  |  | $ 53,750,000 |  |  |  |  |  |  |
Fixed rate cost |  |  |  | 10.00% |  |  |  |  |  |  |
Total long-term debt |  |  |  | $ 51,317,000 | 50,173,000 |  |  |  |  |  |
Senior Notes | 2025 Notes |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |
Unamortized debt issuance costs |  |  |  | 1,303,000 | 1,720,000 |  |  |  |  |  |
Face amount |  |  |  | $ 291,970,000 |  |  |  |  |  |  |
Fixed rate cost |  |  |  | 11.50% |  |  |  |  |  |  |
Total long-term debt |  |  |  | $ 290,667,000 | $ 290,250,000 |  |  |  |  |  |

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