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Fair Value Measurements (Tables) | 12 Months Ended
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Dec. 31, 2024
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): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2024 | ​ | December 31, 2023
​ | ​ | Principal | ​ | Fair | ​ | Principal | ​ | Fair
​ |  | Amount (1) |  | Value (2) |  | Amount (1) |  | Value (2)
2026 Notes (fully redeemed March 2024) | ​ | $ | — | ​ | $ | — | ​ | $ | 40,199 | ​ | $ | 64,117
MARAD Debt (matures February 2027) | ​ | ​ | 23,831 | ​ | ​ | 23,505 | ​ | ​ | 32,580 | ​ | ​ | 32,348
2029 Notes (mature March 2029) | ​ | ​ | 300,000 | ​ | ​ | 319,500 | ​ | ​ | 300,000 | ​ | ​ | 315,987
Total debt | ​ | $ | 323,831 | ​ | $ | 343,005 | ​ | $ | 372,779 | ​ | $ | 412,452
(1) | Principal amount includes current maturities and excludes any related unamortized debt discount and debt issuance costs. See Note 7 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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