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FAIR VALUE DISCLOSURES - Additional Information (Detail) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Risks and Uncertainties [Abstract] |  |
Allowance for loan losses | $ 4,352,000 orrf_ImpairedFinancingReceivablesAllocatedAllowance | $ 3,238,000 orrf_ImpairedFinancingReceivablesAllocatedAllowance
Specific charges to value the real estate owned | 581,000 orrf_SpecificChargesToValueRealEstateOwned | 411,000 orrf_SpecificChargesToValueRealEstateOwned
Short-term borrowings maturity period | 90 days |
Fair Value, Measurements, Recurring [Member] |  |
Risks and Uncertainties [Abstract] |  |
Fair value liabilities | $ 0 us-gaap_LiabilitiesFairValueDisclosure / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | $ 0 us-gaap_LiabilitiesFairValueDisclosure / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember

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- Definition Impaired financing receivables allocated allowance. + References No definition available. + Details
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- Definition Specific charges to value the real estate owned at the lower of cost or fair value on properties. + References No definition available. + Details
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- Definition Fair value of financial and nonfinancial obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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- Details
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