The amount of commission expense capitalized to the cost of the acquired vessels.

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The amount of fee per emission allowance required to be surrendered by the Responsible entity under EU ETS or other applicable emission scheme in any calendar year.

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Amount of flat fee payable of per newbuilding vessel, for the on premises supervision of any newbuilding contracts by selected engineers and others of its staff. The amount is capitalized to the newbuilding cost.

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Represents the fee on gross freight, charter hire, ballast bonus and demurrage payable to related party of the entity after signing the addendum to the management contract.

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Represents the amount of annual management fee payable to related party.

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Represents the annual number of common stock shares payable to related party as management fee.

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Represents the management fee payable to related party of the entity based on the contract price of any vessel bought or sold by the manager on its behalf (excluding new buildings).

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Represents the amount of management fees per vessel per day payable to related party of the entity for vessels on bareboat charter.

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Represents the amount of management fees per vessel per day payable to related party of the entity for vessels on time charter.

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Amount of supervision fee capitalized to vessels under construction.

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Amount of net periodic benefit cost (credit) for defined benefit plan.

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Amount of expense for investment management fee, including, but not limited to, expense in connection with research, selection, supervision, and custody of investment.

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Amount, after allowance, of receivables classified as other, due within one year or the operating cycle, if longer.

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Amount of liability, recognized in statement of financial position, for defined benefit pension and other postretirement plans, classified as current.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Related Party Transactions (Details) - USD ($)		6 Months Ended		12 Months Ended
Related Party Transactions (Details) - USD ($)	Feb. 03, 2025	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Related Party Transactions
Due from related parties		$ 49,102,000		$ 52,572,000
Prior service cost and periodic cost		2,807,000	$ 715,000
Executive Retirement Plan
Related Party Transactions
Prior service cost and periodic cost		2,800,000	700,000
Manager
Related Party Transactions
Related Party Transaction, Annual Management Fee	$ 2,000,000
Related Party Transaction, Annual Management Fee, Shares	100,000
Daily vessel management fees for vessels on bareboat charter	$ 475
Daily vessel management fees for vessels on time charter	950
Supervision fee per new building vessel payable	850,000	850,000
Fee per emission allowance, surrendered by responsible entity	$ 1
Supervision fees for vessels capitalized		600,000		3,000,000
Due from related parties		49,100,000		52,600,000
Manager \| Danaos Chartering
Related Party Transactions
Commercial services commissions			5,900,000
Manager \| General and administrative expenses
Related Party Transactions
Management fees		15,300,000
Related party \| Danaos Chartering
Related Party Transactions
Management fee on gross freight, charter hire, ballast bonus and demurrage (as a percent)	1.25%
Management fee based on the contract price of any vessel bought or sold (as a percent)	1.00%
Commercial services commissions		6,400,000
Commissions on acquisition of vessels		600,000		6,000,000
Related party \| General and administrative expenses
Related Party Transactions
Management fees			$ 13,900,000
Other long-term liabilities \| Executive officers
Related Party Transactions
Advances related to a defined benefit executive retirement plan		$ 15,100,000		$ 12,900,000