Fair Value Measurements - Fair value hierarchy (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Financial assets:
Current derivative assets	$ 2,133	$ 2,276
Non-current derivative assets	2,250	1,908
Financial liabilities:
Current derivative liabilities		247
Non-current derivative liabilities	161	909
Recurring \| Carrying Value
Financial assets:
Cash and cash equivalents	95,255	88,983
Financial liabilities:
Long-term debt, current and non-current	905,915	959,633
Recurring \| Carrying Value \| Interest rate swap contracts
Financial assets:
Current derivative assets	2,133	2,276
Non-current derivative assets	2,250	1,908
Financial liabilities:
Current derivative liabilities		247
Non-current derivative liabilities	161	909
Recurring \| Fair Value
Financial assets:
Cash and cash equivalents	95,255	88,983
Financial liabilities:
Long-term debt, current and non-current	889,741	941,525
Recurring \| Fair Value \| Interest rate swap contracts
Financial assets:
Current derivative assets	2,133	2,276
Non-current derivative assets	2,250	1,908
Financial liabilities:
Current derivative liabilities		247
Non-current derivative liabilities	161	909
Recurring \| Fair Value \| Quoted Price in Active Markets for Identical Assets (Level 1)
Financial assets:
Cash and cash equivalents	95,255	88,983
Recurring \| Fair Value \| Significant Other Observable Inputs (Level 2)
Financial liabilities:
Long-term debt, current and non-current	889,741	941,525
Recurring \| Fair Value \| Significant Other Observable Inputs (Level 2) \| Interest rate swap contracts
Financial assets:
Current derivative assets	2,133	2,276
Non-current derivative assets	2,250	1,908
Financial liabilities:
Current derivative liabilities		247
Non-current derivative liabilities	$ 161	909
Non-Recurring \| Carrying Value
Financial liabilities:
Non-current asset: Vessel		59,498
Non-Recurring \| Fair Value
Financial liabilities:
Non-current asset: Vessel		59,498
Non-Recurring \| Fair Value \| Significant Unobservable Inputs (Level 3)
Financial liabilities:
Non-current asset: Vessel		$ 59,498

Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

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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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