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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Leases (Details)	Dec. 31, 2025 lease
Accounting Policies [Abstract]
Lessee, number of finance leases	1

X

- Definition

Lessee, Number Of Finance Leases

+ References

No definition available.

+ Details

Name:	orrf_LesseeNumberOfFinanceLeases
Namespace Prefix:	orrf_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	us-gaap_AccountingPoliciesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration