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CONTINGENCIES - Additional Information (Detail) - claim	Jun. 22, 2015	Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Legal proceedings		0
Period to file an amendment	30 days

X

- Definition

Loss Contingency, Claims Dismissed, Period To File An Amendment Or Notice To Stand On The Amended Complaint

+ References

No definition available.

+ Details

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Namespace Prefix:	orrf_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of legal proceedings that have material effect.

+ References

No definition available.

+ Details

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

X

- References

No definition available.

+ Details

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