v3.25.2
General (Details)
6 Months Ended
Jun. 30, 2025
member
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of electric distribution cooperative members
38
X
- Definition
Represents the number of electric distribution cooperative members.
+ References
No definition available.
+ Details
Name:
opc_NumberOfElectricDistributionCooperativeMembers
Namespace Prefix:
opc_
Data Type:
xbrli:integerItemType
Balance Type:
na
Period Type:
duration
X
- References
No definition available.
+ Details
Name:
us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract
Namespace Prefix:
us-gaap_
Data Type:
xbrli:stringItemType
Balance Type:
na
Period Type:
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