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Fair Value Measurements (Tables) | 6 Months Ended
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Jun. 30, 2025
Fair Value Measurements |
Schedule of principal amount and estimated fair value of long-term debt | The principal amount and estimated fair value of our long-term debt are as follows (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, 2025 | ​ | December 31, 2024
​ | ​ | Principal | ​ | Fair | ​ | Principal | ​ | Fair
​ |  | Amount (1) |  | Value (2) |  | Amount (1) |  | Value (2)
MARAD Debt (matures February 2027) | ​ | $ | 19,294 | ​ | $ | 19,244 | ​ | $ | 23,831 | ​ | $ | 23,505
2029 Notes (mature March 2029) | ​ | ​ | 300,000 | ​ | ​ | 317,250 | ​ | ​ | 300,000 | ​ | ​ | 319,500
Total debt | ​ | $ | 319,294 | ​ | $ | 336,494 | ​ | $ | 323,831 | ​ | $ | 343,005
(1) | Principal amount includes current maturities and excludes any related unamortized debt discount and debt issuance costs. See Note 5 for additional disclosures on our long-term debt.
(2) | The estimated fair value was determined using Level 2 fair value inputs under the market approach, which was determined using quotes in inactive markets.

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- Definition Tabular disclosure of information pertaining to carrying amount and estimated fair value of short-term and long-term debt instruments or arrangements, including but not limited to, identification of terms, features, and collateral requirements. + References No definition available. + Details
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