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Long-term Debt (Narrative I) (Details) $ in Thousands	Jul. 02, 2024 USD ($)	Jun. 30, 2025 USD ($) Vessels	Dec. 31, 2024 USD ($)	Jun. 30, 2024 USD ($)
Debt Instrument [Line Items]
Minimum cash deposits required to be maintained		$ 18,500	$ 19,000	$ 19,500
Secured Debt [Member]
Debt Instrument [Line Items]
Number of vessels collateral for debt \| Vessels		27
Collateral amount		$ 573,351
Minimum cash deposits required to be maintained		$ 18,500	$ 19,000
8.75% Senior Unsecured Bond [Member]
Debt Instrument [Line Items]
Loan amount	$ 175,000
Interest rate, stated percentage	8.75%
8.75% Senior Unsecured Bond [Member] \| July 2027 [Member]
Debt Instrument [Line Items]
Redemption price, percentage	103.50%
8.75% Senior Unsecured Bond [Member] \| January 2028 [Member]
Debt Instrument [Line Items]
Redemption price, percentage	102.625%
8.75% Senior Unsecured Bond [Member] \| July 2028 [Member]
Debt Instrument [Line Items]
Redemption price, percentage	101.75%
8.75% Senior Unsecured Bond [Member] \| January 2029 [Member]
Debt Instrument [Line Items]
Redemption price, percentage	100.00%