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LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES - Bank's Ratings Based on its Internal Risk Rating System (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Bank's ratings based on its internal risk rating system    
Total Loans $ 727,753us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome $ 704,946us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
Commercial real estate    
Bank's ratings based on its internal risk rating system    
Total Loans 340,069us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 322,006us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Commercial real estate | Owner-occupied    
Bank's ratings based on its internal risk rating system    
Total Loans 111,399us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_OwnerOccupiedMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 100,859us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_OwnerOccupiedMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Commercial real estate | Non-owner occupied    
Bank's ratings based on its internal risk rating system    
Total Loans 150,921us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_NonOwnerOccupiedMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 144,301us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_NonOwnerOccupiedMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Commercial real estate | Multi-family    
Bank's ratings based on its internal risk rating system    
Total Loans 28,943us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_MultiFamilyMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 27,531us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_MultiFamilyMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Commercial real estate | Non-owner occupied residential    
Bank's ratings based on its internal risk rating system    
Total Loans 48,806us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_NonOwnerOccupiedResidentialMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 49,315us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_NonOwnerOccupiedResidentialMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Acquisition and development    
Bank's ratings based on its internal risk rating system    
Total Loans 32,122us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_AcquisitionAndDevelopmentPortfolioSegmentMember		 30,161us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_AcquisitionAndDevelopmentPortfolioSegmentMember
Acquisition and development | 1-4 family residential construction    
Bank's ratings based on its internal risk rating system    
Total Loans 5,883us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_OneToFourFamilyResidentialConstructionMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_AcquisitionAndDevelopmentPortfolioSegmentMember		 5,924us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_OneToFourFamilyResidentialConstructionMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_AcquisitionAndDevelopmentPortfolioSegmentMember
Acquisition and development | Commercial and land development    
Bank's ratings based on its internal risk rating system    
Total Loans 26,239us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_CommercialAndLandDevelopmentMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_AcquisitionAndDevelopmentPortfolioSegmentMember		 24,237us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_CommercialAndLandDevelopmentMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_AcquisitionAndDevelopmentPortfolioSegmentMember
Commercial and industrial    
Bank's ratings based on its internal risk rating system    
Total Loans 48,742us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_CommercialAndIndustrialPortfolioSegmentMember		 48,995us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_CommercialAndIndustrialPortfolioSegmentMember
Municipal    
Bank's ratings based on its internal risk rating system    
Total Loans 60,661us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_MunicipalMember		 61,191us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_MunicipalMember
Residential mortgage    
Bank's ratings based on its internal risk rating system    
Total Loans 240,287us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember		 236,702us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
Residential mortgage | First lien    
Bank's ratings based on its internal risk rating system    
Total Loans 125,752us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_FirstLienMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember		 126,491us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_FirstLienMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
Residential mortgage | Home equity - term    
Bank's ratings based on its internal risk rating system    
Total Loans 19,912us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_HomeEquityTermMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember		 20,845us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_HomeEquityTermMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
Residential mortgage | Home equity - lines of credit    
Bank's ratings based on its internal risk rating system    
Total Loans 94,623us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember		 89,366us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
Installment and other loans    
Bank's ratings based on its internal risk rating system    
Total Loans 5,872us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember		 5,891us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember
Pass    
Bank's ratings based on its internal risk rating system    
Total Loans 671,137us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember		 647,601us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
Pass | Commercial real estate | Owner-occupied    
Bank's ratings based on its internal risk rating system    
Total Loans 100,189us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_OwnerOccupiedMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 89,815us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_OwnerOccupiedMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Pass | Commercial real estate | Non-owner occupied    
Bank's ratings based on its internal risk rating system    
Total Loans 128,162us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_NonOwnerOccupiedMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 120,829us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_NonOwnerOccupiedMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Pass | Commercial real estate | Multi-family    
Bank's ratings based on its internal risk rating system    
Total Loans 25,547us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_MultiFamilyMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 24,803us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_MultiFamilyMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Pass | Commercial real estate | Non-owner occupied residential    
Bank's ratings based on its internal risk rating system    
Total Loans 43,174us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_NonOwnerOccupiedResidentialMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 43,020us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_NonOwnerOccupiedResidentialMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Pass | Acquisition and development | 1-4 family residential construction    
Bank's ratings based on its internal risk rating system    
Total Loans 5,883us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_OneToFourFamilyResidentialConstructionMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_AcquisitionAndDevelopmentPortfolioSegmentMember		 5,924us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_OneToFourFamilyResidentialConstructionMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_AcquisitionAndDevelopmentPortfolioSegmentMember
Pass | Acquisition and development | Commercial and land development    
Bank's ratings based on its internal risk rating system    
Total Loans 24,352us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_CommercialAndLandDevelopmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_AcquisitionAndDevelopmentPortfolioSegmentMember		 22,261us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_CommercialAndLandDevelopmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_AcquisitionAndDevelopmentPortfolioSegmentMember
Pass | Commercial and industrial    
Bank's ratings based on its internal risk rating system    
Total Loans 43,679us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_CommercialAndIndustrialPortfolioSegmentMember		 43,794us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_CommercialAndIndustrialPortfolioSegmentMember
Pass | Municipal    
Bank's ratings based on its internal risk rating system    
Total Loans 60,661us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_MunicipalMember		 61,191us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_MunicipalMember
Pass | Residential mortgage | First lien    
Bank's ratings based on its internal risk rating system    
Total Loans 120,619us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_FirstLienMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember		 121,160us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_FirstLienMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
Pass | Residential mortgage | Home equity - term    
Bank's ratings based on its internal risk rating system    
Total Loans 19,751us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_HomeEquityTermMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember		 20,775us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_HomeEquityTermMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
Pass | Residential mortgage | Home equity - lines of credit    
Bank's ratings based on its internal risk rating system    
Total Loans 93,272us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember		 88,164us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
Pass | Installment and other loans    
Bank's ratings based on its internal risk rating system    
Total Loans 5,848us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember		 5,865us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember
Special Mention    
Bank's ratings based on its internal risk rating system    
Total Loans 22,308us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember		 29,123us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
Special Mention | Commercial real estate | Owner-occupied    
Bank's ratings based on its internal risk rating system    
Total Loans 2,529us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_OwnerOccupiedMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 2,686us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_OwnerOccupiedMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Special Mention | Commercial real estate | Non-owner occupied    
Bank's ratings based on its internal risk rating system    
Total Loans 13,700us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_NonOwnerOccupiedMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 20,661us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_NonOwnerOccupiedMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Special Mention | Commercial real estate | Multi-family    
Bank's ratings based on its internal risk rating system    
Total Loans 1,367us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_MultiFamilyMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 1,086us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_MultiFamilyMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Special Mention | Commercial real estate | Non-owner occupied residential    
Bank's ratings based on its internal risk rating system    
Total Loans 2,870us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_NonOwnerOccupiedResidentialMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 2,968us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_NonOwnerOccupiedResidentialMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Special Mention | Acquisition and development | 1-4 family residential construction    
Bank's ratings based on its internal risk rating system    
Total Loans 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_OneToFourFamilyResidentialConstructionMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_AcquisitionAndDevelopmentPortfolioSegmentMember		 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_OneToFourFamilyResidentialConstructionMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_AcquisitionAndDevelopmentPortfolioSegmentMember
Special Mention | Acquisition and development | Commercial and land development    
Bank's ratings based on its internal risk rating system    
Total Loans 230us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_CommercialAndLandDevelopmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_AcquisitionAndDevelopmentPortfolioSegmentMember		 233us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_CommercialAndLandDevelopmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_AcquisitionAndDevelopmentPortfolioSegmentMember
Special Mention | Commercial and industrial    
Bank's ratings based on its internal risk rating system    
Total Loans 958us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_CommercialAndIndustrialPortfolioSegmentMember		 850us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_CommercialAndIndustrialPortfolioSegmentMember
Special Mention | Municipal    
Bank's ratings based on its internal risk rating system    
Total Loans 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_MunicipalMember		 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_MunicipalMember
Special Mention | Residential mortgage | First lien    
Bank's ratings based on its internal risk rating system    
Total Loans 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_FirstLienMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember		 9us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_FirstLienMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
Special Mention | Residential mortgage | Home equity - term    
Bank's ratings based on its internal risk rating system    
Total Loans 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_HomeEquityTermMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember		 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_HomeEquityTermMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
Special Mention | Residential mortgage | Home equity - lines of credit    
Bank's ratings based on its internal risk rating system    
Total Loans 654us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember		 630us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
Special Mention | Installment and other loans    
Bank's ratings based on its internal risk rating system    
Total Loans 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember		 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember
Non-Impaired Substandard    
Bank's ratings based on its internal risk rating system    
Total Loans 19,324us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= orrf_NonImpairedSubstandardMember		 12,690us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= orrf_NonImpairedSubstandardMember
Non-Impaired Substandard | Commercial real estate | Owner-occupied    
Bank's ratings based on its internal risk rating system    
Total Loans 5,457us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_OwnerOccupiedMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_NonImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 5,070us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_OwnerOccupiedMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_NonImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Non-Impaired Substandard | Commercial real estate | Non-owner occupied    
Bank's ratings based on its internal risk rating system    
Total Loans 7,424us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_NonOwnerOccupiedMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_NonImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 1,131us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_NonOwnerOccupiedMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_NonImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Non-Impaired Substandard | Commercial real estate | Multi-family    
Bank's ratings based on its internal risk rating system    
Total Loans 1,308us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_MultiFamilyMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_NonImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 1,322us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_MultiFamilyMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_NonImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Non-Impaired Substandard | Commercial real estate | Non-owner occupied residential    
Bank's ratings based on its internal risk rating system    
Total Loans 1,800us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_NonOwnerOccupiedResidentialMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_NonImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 1,827us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_NonOwnerOccupiedResidentialMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_NonImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Non-Impaired Substandard | Acquisition and development | 1-4 family residential construction    
Bank's ratings based on its internal risk rating system    
Total Loans 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_OneToFourFamilyResidentialConstructionMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_NonImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_AcquisitionAndDevelopmentPortfolioSegmentMember		 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_OneToFourFamilyResidentialConstructionMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_NonImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_AcquisitionAndDevelopmentPortfolioSegmentMember
Non-Impaired Substandard | Acquisition and development | Commercial and land development    
Bank's ratings based on its internal risk rating system    
Total Loans 1,319us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_CommercialAndLandDevelopmentMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_NonImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_AcquisitionAndDevelopmentPortfolioSegmentMember		 1,333us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_CommercialAndLandDevelopmentMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_NonImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_AcquisitionAndDevelopmentPortfolioSegmentMember
Non-Impaired Substandard | Commercial and industrial    
Bank's ratings based on its internal risk rating system    
Total Loans 1,889us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= orrf_NonImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_CommercialAndIndustrialPortfolioSegmentMember		 1,914us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= orrf_NonImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_CommercialAndIndustrialPortfolioSegmentMember
Non-Impaired Substandard | Municipal    
Bank's ratings based on its internal risk rating system    
Total Loans 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= orrf_NonImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_MunicipalMember		 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= orrf_NonImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_MunicipalMember
Non-Impaired Substandard | Residential mortgage | First lien    
Bank's ratings based on its internal risk rating system    
Total Loans 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_FirstLienMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_NonImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember		 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_FirstLienMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_NonImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
Non-Impaired Substandard | Residential mortgage | Home equity - term    
Bank's ratings based on its internal risk rating system    
Total Loans 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_HomeEquityTermMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_NonImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember		 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_HomeEquityTermMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_NonImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
Non-Impaired Substandard | Residential mortgage | Home equity - lines of credit    
Bank's ratings based on its internal risk rating system    
Total Loans 127us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_NonImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember		 93us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_NonImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
Non-Impaired Substandard | Installment and other loans    
Bank's ratings based on its internal risk rating system    
Total Loans 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= orrf_NonImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember		 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= orrf_NonImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember
Impaired - Substandard    
Bank's ratings based on its internal risk rating system    
Total Loans 13,763us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember		 15,500us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember
Impaired - Substandard | Commercial real estate | Owner-occupied    
Bank's ratings based on its internal risk rating system    
Total Loans 3,224us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_OwnerOccupiedMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 3,288us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_OwnerOccupiedMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Impaired - Substandard | Commercial real estate | Non-owner occupied    
Bank's ratings based on its internal risk rating system    
Total Loans 414us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_NonOwnerOccupiedMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 1,680us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_NonOwnerOccupiedMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Impaired - Substandard | Commercial real estate | Multi-family    
Bank's ratings based on its internal risk rating system    
Total Loans 721us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_MultiFamilyMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 320us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_MultiFamilyMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Impaired - Substandard | Commercial real estate | Non-owner occupied residential    
Bank's ratings based on its internal risk rating system    
Total Loans 962us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_NonOwnerOccupiedResidentialMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 1,500us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_NonOwnerOccupiedResidentialMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Impaired - Substandard | Acquisition and development | 1-4 family residential construction    
Bank's ratings based on its internal risk rating system    
Total Loans 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_OneToFourFamilyResidentialConstructionMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_AcquisitionAndDevelopmentPortfolioSegmentMember		 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_OneToFourFamilyResidentialConstructionMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_AcquisitionAndDevelopmentPortfolioSegmentMember
Impaired - Substandard | Acquisition and development | Commercial and land development    
Bank's ratings based on its internal risk rating system    
Total Loans 338us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_CommercialAndLandDevelopmentMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_AcquisitionAndDevelopmentPortfolioSegmentMember		 410us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_CommercialAndLandDevelopmentMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_AcquisitionAndDevelopmentPortfolioSegmentMember
Impaired - Substandard | Commercial and industrial    
Bank's ratings based on its internal risk rating system    
Total Loans 2,216us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_CommercialAndIndustrialPortfolioSegmentMember		 2,437us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_CommercialAndIndustrialPortfolioSegmentMember
Impaired - Substandard | Municipal    
Bank's ratings based on its internal risk rating system    
Total Loans 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_MunicipalMember		 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_MunicipalMember
Impaired - Substandard | Residential mortgage | First lien    
Bank's ratings based on its internal risk rating system    
Total Loans 5,133us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_FirstLienMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember		 5,290us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_FirstLienMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
Impaired - Substandard | Residential mortgage | Home equity - term    
Bank's ratings based on its internal risk rating system    
Total Loans 161us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_HomeEquityTermMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember		 70us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_HomeEquityTermMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
Impaired - Substandard | Residential mortgage | Home equity - lines of credit    
Bank's ratings based on its internal risk rating system    
Total Loans 570us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember		 479us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
Impaired - Substandard | Installment and other loans    
Bank's ratings based on its internal risk rating system    
Total Loans 24us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember		 26us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember
Doubtful    
Bank's ratings based on its internal risk rating system    
Total Loans 1,221us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember		 32us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
Doubtful | Commercial real estate | Owner-occupied    
Bank's ratings based on its internal risk rating system    
Total Loans 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_OwnerOccupiedMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_OwnerOccupiedMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Doubtful | Commercial real estate | Non-owner occupied    
Bank's ratings based on its internal risk rating system    
Total Loans 1,221us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_NonOwnerOccupiedMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_NonOwnerOccupiedMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Doubtful | Commercial real estate | Multi-family    
Bank's ratings based on its internal risk rating system    
Total Loans 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_MultiFamilyMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_MultiFamilyMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Doubtful | Commercial real estate | Non-owner occupied residential    
Bank's ratings based on its internal risk rating system    
Total Loans 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_NonOwnerOccupiedResidentialMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_NonOwnerOccupiedResidentialMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Doubtful | Acquisition and development | 1-4 family residential construction    
Bank's ratings based on its internal risk rating system    
Total Loans 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_OneToFourFamilyResidentialConstructionMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_AcquisitionAndDevelopmentPortfolioSegmentMember		 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_OneToFourFamilyResidentialConstructionMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_AcquisitionAndDevelopmentPortfolioSegmentMember
Doubtful | Acquisition and development | Commercial and land development    
Bank's ratings based on its internal risk rating system    
Total Loans 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_CommercialAndLandDevelopmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_AcquisitionAndDevelopmentPortfolioSegmentMember		 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
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= orrf_CommercialAndLandDevelopmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_AcquisitionAndDevelopmentPortfolioSegmentMember
Doubtful | Commercial and industrial    
Bank's ratings based on its internal risk rating system    
Total Loans 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
/ us-gaap_StatementBusinessSegmentsAxis
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/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_CommercialAndIndustrialPortfolioSegmentMember
Doubtful | Municipal    
Bank's ratings based on its internal risk rating system    
Total Loans 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
/ us-gaap_StatementBusinessSegmentsAxis
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/ us-gaap_InternalCreditAssessmentAxis
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/ us-gaap_StatementBusinessSegmentsAxis
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Doubtful | Residential mortgage | First lien    
Bank's ratings based on its internal risk rating system    
Total Loans 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_FirstLienMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
/ us-gaap_StatementBusinessSegmentsAxis
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/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_FirstLienMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
/ us-gaap_StatementBusinessSegmentsAxis
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Doubtful | Residential mortgage | Home equity - term    
Bank's ratings based on its internal risk rating system    
Total Loans 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
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/ us-gaap_InternalCreditAssessmentAxis
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/ us-gaap_StatementBusinessSegmentsAxis
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/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
/ us-gaap_StatementBusinessSegmentsAxis
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Doubtful | Residential mortgage | Home equity - lines of credit    
Bank's ratings based on its internal risk rating system    
Total Loans 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
/ us-gaap_StatementBusinessSegmentsAxis
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/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
Doubtful | Installment and other loans    
Bank's ratings based on its internal risk rating system    
Total Loans $ 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
/ us-gaap_StatementBusinessSegmentsAxis
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/ us-gaap_InternalCreditAssessmentAxis
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/ us-gaap_StatementBusinessSegmentsAxis
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