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LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES - Additional Information (Detail) (USD $)
 12 Months Ended
Dec. 31, 2014
Note
Dec. 31, 2013
Note
Dec. 31, 2012
Note
Financing Receivable, Allowance for Credit Losses [Line Items]      
Maximum percentage of loan-to-value ratio upon loan origination 80.00%orrf_MaximumPercentageOfLoanToValueRatioUponLoanOrigination    
Maximum percentage of loan-to-value ratios of the value of the real estate taken as collateral 90.00%orrf_MaximumPercentageOfLoanToValueRatioOfValueOfRealEstateTakenAsCollateral    
Maximum percentage of credit worthiness of the borrower 43.00%orrf_MaximumPercentageOfCreditWorthinessOfBorrower    
Minimum amount of loan on which reviews have been made annually $ 1,000,000orrf_MinimumAmountOfLoanOnWhichReviewHaveBeenMadeAnnually    
Minimum amount of loan rated as Substandard 250,000orrf_MinimumAmountOfLoanRatedAsSubstandard    
Number of notes split 2orrf_NumberOfNotesSplit    
Minimum amount on which annual updated appraisals for criticized loans is required 250,000orrf_MinimumAmountOnWhichAnnualUpdatedAppraisalsForCriticizedLoansIsRequired    
Percentage of strong loan-to-value (or lower) 70.00%orrf_PercentageOfStrongLoanToValue    
Number of notes sold 6orrf_NumberOfNotesSold 8orrf_NumberOfNotesSold 240orrf_NumberOfNotesSold
Aggregate carrying value of notes 5,407,000orrf_NotesReceivableCarryingAmount 2,576,000orrf_NotesReceivableCarryingAmount 73,820,000orrf_NotesReceivableCarryingAmount
Cash received from notes 5,743,000us-gaap_ProceedsFromSaleOfLoansReceivable 2,439,000us-gaap_ProceedsFromSaleOfLoansReceivable 51,753,000us-gaap_ProceedsFromSaleOfLoansReceivable
Charge off to the allowance for loan losses $ (336,000)us-gaap_AllowanceForLoanAndLeaseLossesLoansSold $ 137,000us-gaap_AllowanceForLoanAndLeaseLossesLoansSold $ 22,067,000us-gaap_AllowanceForLoanAndLeaseLossesLoansSold
Minimum [Member]      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Rating on loans that are deemed impaired 90 days    
Historical loss percentage adjustment to anticipated loss allocation (1.50%)orrf_ValuationAllowancesandReservesAssumptionsLossPercentageHistorical
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		 (1.50%)orrf_ValuationAllowancesandReservesAssumptionsLossPercentageHistorical
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		  
Maximum [Member]      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Historical loss percentage adjustment to anticipated loss allocation 1.50%orrf_ValuationAllowancesandReservesAssumptionsLossPercentageHistorical
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		 1.50%orrf_ValuationAllowancesandReservesAssumptionsLossPercentageHistorical
/ us-gaap_RangeAxis
= us-gaap_MaximumMember