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v3.23.1

Long-Term Debt (Tables) | 3 Months Ended
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Mar. 31, 2023
Debt Disclosure [Abstract] |
Schedule of maturities of long-term debt outstanding | Scheduled maturities of our long-term debt outstanding as of March 31, 2023 are as follows (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | 2023 | ​ | 2026 | ​ | MARAD | ​ | ​ |
​ |  | Notes |  | Notes |  | Debt |  | Total
Less than one year | ​ | $ | 30,000 | ​ | $ | — | ​ | $ | 8,539 |  | $ | 38,539
One to two years | ​ |  | — | ​ |  | — | ​ |  | 8,965 |  | ​ | 8,965
Two to three years | ​ |  | — | ​ |  | 200,000 | ​ |  | 9,412 |  | ​ | 209,412
Three to four years | ​ |  | — | ​ |  | — | ​ |  | 9,881 |  | ​ | 9,881
Gross debt | ​ |  | 30,000 | ​ |  | 200,000 | ​ |  | 36,797 |  | ​ | 266,797
Unamortized debt issuance costs (1) | ​ |  | (87) | ​ |  | (4,299) | ​ |  | (1,951) |  | ​ | (6,337)
Total debt | ​ |  | 29,913 | ​ |  | 195,701 | ​ |  | 34,846 |  | ​ | 260,460
Less current maturities | ​ |  | (29,913) | ​ |  | — | ​ |  | (8,539) |  | ​ | (38,452)
Long-term debt | ​ | $ | — | ​ | $ | 195,701 | ​ | $ | 26,307 |  | $ | 222,008
(1) | Debt issuance costs are amortized to interest expense over the term of the applicable debt agreement.
Schedule of components of net interest expense | The following table details the components of our net interest expense (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended
​ | ​ | March 31,
​ |  | 2023 |  | 2022
Interest expense | ​ | $ | 4,869 |  | $ | 5,307
Interest income | ​ |  | (682) |  | ​ | (133)
Net interest expense | ​ | $ | 4,187 |  | $ | 5,174

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- Definition Tabular disclosure of interest income and expense, including, but not limited to, interest income and expense from investments, loans, and securities. + References No definition available. + Details
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- Definition Tabular disclosure of maturity and sinking fund requirement for long-term debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=123465755&loc=d3e1835-112601 + Details
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