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LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES - Additional Information (Detail) (USD $)
 3 Months Ended
Mar. 31, 2015
Dec. 31, 2014
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  
Percentage of strong loan-to-value 70.00%orrf_PercentageOfStrongLoanToValue  
Minimum    
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_MinimumMember		 (1.50%)orrf_ValuationAllowancesandReservesAssumptionsLossPercentageHistorical
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Maximum    
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