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Long-Term Debt - Maturities Of Long-Term Debt (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Debt Instrument [Line Items] |  |
Less than one year | $ 38,538 |
One to two years | 8,965 |
Two to three years | 209,412 |
Three to four years | 9,882 |
Gross debt | 266,797 | $ 270,913
Unamortized debt issuance costs | (5,829) |
Total debt | 260,968 |
Less: current maturities | (38,499) | (38,200)
Long-term debt | 222,469 | 225,875
2023 Notes (mature September 2023) |  |
Debt Instrument [Line Items] |  |
Less than one year | 30,000 |
Gross debt | 30,000 | 30,000
Unamortized debt issuance costs | (39) |
Total debt | 29,961 |
Less: current maturities | (29,961) |
2026 Notes (mature February 2026) |  |
Debt Instrument [Line Items] |  |
Two to three years | 200,000 |
Gross debt | 200,000 | 200,000
Unamortized debt issuance costs | (3,961) |
Total debt | 196,039 |
Long-term debt | 196,039 |
MARAD Debt (matures February 2027) |  |
Debt Instrument [Line Items] |  |
Less than one year | 8,538 |
One to two years | 8,965 |
Two to three years | 9,412 |
Three to four years | 9,882 |
Gross debt | 36,797 | $ 40,913
Unamortized debt issuance costs | (1,829) |
Total debt | 34,968 |
Less: current maturities | (8,538) |
Long-term debt | $ 26,430 |

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