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Long-Term Debt - Maturities Of Long-Term Debt (Details) - USD ($) $ in Thousands | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Debt Instrument [Line Items] |  |
Less than one year | $ 8,133 |
One to two years | 38,538 |
Two to three years | 8,965 |
Three to four years | 209,412 |
Four to five years | 9,882 |
Gross debt | 274,930 | $ 313,850
Unamortized debt issuance costs | (7,820) |
Total debt | 267,110 |
Less: current maturities | (8,133) | (42,873)
Long-term debt | 258,977 | 262,137
Convertible Senior Notes Maturing September 2023 |  |
Debt Instrument [Line Items] |  |
One to two years | 30,000 |
Gross debt | 30,000 | 30,000
Unamortized debt issuance costs | (225) |
Total debt | 29,775 |
Long-term debt | 29,775 |
Convertible Senior Notes Maturing February 2026 |  |
Debt Instrument [Line Items] |  |
Three to four years | 200,000 |
Gross debt | 200,000 | 200,000
Unamortized debt issuance costs | (5,278) |
Total debt | 194,722 |
Long-term debt | 194,722 |
MARAD Debt Maturing February 2027 |  |
Debt Instrument [Line Items] |  |
Less than one year | 8,133 |
One to two years | 8,538 |
Two to three years | 8,965 |
Three to four years | 9,412 |
Four to five years | 9,882 |
Gross debt | 44,930 | $ 48,850
Unamortized debt issuance costs | (2,317) |
Total debt | 42,613 |
Less: current maturities | (8,133) |
Long-term debt | $ 34,480 |

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