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Contingencies - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2014 Claim
Commitments and Contingencies Disclosure [Abstract]
Legal proceedings	0
Contingencies dismissed date	Aug. 23, 2013

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

X

- Definition

Date the pending litigation matter was dismissed, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

Name:	us-gaap_LossContingencyDateOfDismissal
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration