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

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- Definition

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+ References

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- Definition

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- Definition

Specific charges to value the real estate owned at the lower of cost or fair value on properties.

+ References

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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

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