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Contingencies - Additional Information (Detail)	Mar. 31, 2015 Claim
Commitments and Contingencies Disclosure [Abstract]
Legal proceedings	0orrf_NumberOfLegalProceedingsThatHaveMaterialEffect

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

- Details

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