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Significant Accounting Policies - Recent Accounting Pronouncements, Accounting for Revenues and Expenses (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Accounting for Revenues and Expenses [Abstract] |  |  |
Loss on bunkers | $ (1,160) | $ (186) | $ (1,949)

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- Definition 'The amount of gain (loss) on bunkers (fuel oil and diesel oil) during the period. The gain (loss) is the difference in the value of bunkers paid by the Company when the vessel was redelivered to the Company from the time charterer under the vessel's previous time charter agreement and the value of bunkers sold by the Company when the vessel was delivered to a new time charterer for vessels engaged in time charter contracts and the bunkers consumed during the period the product tanker vessel was engaged under a voyage charter. Loss on bunkers may also include the bunkers consumed during idle or off-hire periods. + References No definition available. + Details
Name: | op_GainLossOnBunkers
Namespace Prefix: | op_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_RevenuesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration