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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Detail) (USD $)
3 Months Ended
Mar. 31, 2015
Segment
Office
Mar. 31, 2014
Dec. 31, 2014
Accounting Policies [Line Items]      
Number of offices in which the company operates throughout the country 22orrf_NumberOfOffices    
Impairment charge related to investment $ 0us-gaap_ImpairmentOfInvestments    
Held to maturity or trading securities 0orrf_HeldToMaturityOrTradingSecurities   0orrf_HeldToMaturityOrTradingSecurities
Debt securities other than temporarily impaired 0orrf_DebtSecuritiesOtherThanTemporarilyImpaired   0orrf_DebtSecuritiesOtherThanTemporarilyImpaired
Maturity of interest bearing deposits 90 days    
Balance of loans serviced for others 311,920,000orrf_BalanceOfLoansServicedForOthers   315,239,000orrf_BalanceOfLoansServicedForOthers
Foreclosed real estate totaled 1,431,000us-gaap_RealEstateAcquiredThroughForeclosure   932,000us-gaap_RealEstateAcquiredThroughForeclosure
Advertising expense 112,000us-gaap_AdvertisingExpense 233,000us-gaap_AdvertisingExpense  
Percentage of deferred tax assets 50.00%orrf_PercentageOfDeferredTaxAssets    
Accumulated other comprehensive income (loss), net of taxes $ 3,522,000us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax   $ 1,576,000us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
Number of operating significant segment 1us-gaap_NumberOfOperatingSegments    
Minimum | Building and Improvements      
Accounting Policies [Line Items]      
Plant and equipment, useful life 10 years    
Minimum | Furniture and Equipment      
Accounting Policies [Line Items]      
Plant and equipment, useful life 3 years    
Maximum      
Accounting Policies [Line Items]      
Cash and cash equivalents, original maturities 90 days    
Maximum | Building and Improvements      
Accounting Policies [Line Items]      
Plant and equipment, useful life 40 years    
Maximum | Furniture and Equipment      
Accounting Policies [Line Items]      
Plant and equipment, useful life 15 years