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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 |

X
- Definition Related party transaction amount of loans to related party. + References No definition available. + Details
Name: | orrf_RelatedPartyTransactionAmountOfLoansToRelatedParty
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
Name: | orrf_RelatedPartyTransactionAmountOfNewLoansGrantedToRelatedParty
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

X
- References No definition available. + Details
Name: | us-gaap_ReceivablesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration