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CONTINGENCIES (Detail) - claim | Jun. 22, 2015 | Mar. 31, 2016
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Commitments and Contingencies Disclosure [Abstract] |  |
Legal proceedings |  | 0
Number of days to file an amendment or stand on current amended complaint | 30 days |

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- Definition Loss Contingency, Claims Dismissed, Period To File An Amendment Or Notice To Stand On The Amended Complaint + References No definition available. + Details
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Namespace Prefix: | orrf_
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- Definition Number of legal proceedings that have material effect. + References No definition available. + Details
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Namespace Prefix: | orrf_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
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