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LOANS TO RELATED PARTIES (Detail) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015
Related Party Transactions [Abstract] |  |
Aggregate amount of loans | $ 677 | $ 647
New loans granted | 522 |
Repayments | 538 |
Other changes | $ 46 |

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- 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

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- 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

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- Definition Related Party Transaction, Loans To Related Party, Other Adjustments + References No definition available. + Details
Name: | orrf_RelatedPartyTransactionLoansToRelatedPartyOtherAdjustments
Namespace Prefix: | orrf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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