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SHAREHOLDERS’ EQUITY AND REGULATORY CAPITAL - Additional Information (Detail) (USD $) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2014 | Jan. 08, 2013
Equity [Abstract] |  |
Common stock, reserved (shares) | 1,045,000 orrf_CommonStockSharesReservedForIssuanceUnderPurchasePlan |
Shares available to be issued | 663,000 orrf_SharesAvailableForIssuanceUnderStockPurchasePlan |
Aggregate capital, amount |  | $ 80,000,000 orrf_AuthorizedShareCapital

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- Definition Authorized Share Capital + References No definition available. + Details
Name: | orrf_AuthorizedShareCapital
Namespace Prefix: | orrf_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Common stock shares reserved for issuance under purchase plan. + References No definition available. + Details
Name: | orrf_CommonStockSharesReservedForIssuanceUnderPurchasePlan
Namespace Prefix: | orrf_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

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- Definition Shares available for issuance under stock purchase plan. + References No definition available. + Details
Name: | orrf_SharesAvailableForIssuanceUnderStockPurchasePlan
Namespace Prefix: | orrf_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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