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LOANS TO RELATED PARTIES - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Receivables [Abstract]
New loans including interest granted	$ 647	$ 597
New loans granted	675
Total repayment of loan	$ 625

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- Definition

Related party transaction amount of loans to related party.

+ References

No definition available.

+ Details

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Namespace Prefix:	orrf_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Related party transaction amount of new loans granted to related party.

+ References

No definition available.

+ Details

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Namespace Prefix:	orrf_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Related party transaction proceeds from repayments of loans to related party.

+ References

No definition available.

+ Details

Name:	orrf_RelatedPartyTransactionProceedsFromRepaymentsOfLoansToRelatedParty
Namespace Prefix:	orrf_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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Period Type:	duration