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Fair Value Measurements - Principal Amount And Estimated Fair Value Of Long-Term Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024	Dec. 01, 2023
Fair Value Measurements
Principal Amount	$ 314,645	$ 323,831
Fair Value	328,111	343,005
MARAD Debt (matures February 2027)
Fair Value Measurements
Principal Amount	14,645	23,831
Fair Value	14,611	23,505
2029 Notes (mature March 2029)
Fair Value Measurements
Principal Amount	300,000	300,000	$ 300,000
Fair Value	$ 313,500	$ 319,500

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- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

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