Subsequent Events (Details) - TowneBank[Member] - Subsequent Event [Member]	Apr. 02, 2025 $ / shares shares
Proposed Merger Agreement [Abstract]
Cash consideration (in dollars per share) \| $ / shares	$ 41
Stock consideration (in shares) \| shares	1.14
Minimum [Member]
Proposed Merger Agreement [Abstract]
Percentage of stock consideration received	50.00%
Maximum [Member]
Proposed Merger Agreement [Abstract]
Percentage of stock consideration received	60.00%

Per the business acquisition agreement the consideration paid to the acquiree shareholders is determined by an election of cash or equity consideration. The shareholder election will be subject to a proration mechanism, such that the total number of shares of Company common stock (including shares subject to Company restricted stock awards) entitled to receive the stock consideration will be equal to a specified ratio that no less than and no more than a specified percentage of the aggregate number of shares of Company common stock issued and outstanding immediately prior to the effective time (including shares subject to Company restricted stock awards), and all other shares of Company common stock issued and outstanding immediately prior to the effective time will be entitled to receive the cash consideration.

No definition available.

Name:	opof_BusinessAcquisitionShareholderElectionProration
Namespace Prefix:	opof_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant