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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
Dec. 31, 2014
Dec. 31, 2013
Bank's ratings based on its internal risk rating system    
Total Loans $ 704,946us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome $ 671,037us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
Commercial and Industrial [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 48,995us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_CommercialAndIndustrialPortfolioSegmentMember		 33,446us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_CommercialAndIndustrialPortfolioSegmentMember
Municipal [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 61,191us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_MunicipalMember		 60,996us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_MunicipalMember
Installment and Other Loans [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 5,891us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_AllOtherSegmentsMember		 6,184us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_AllOtherSegmentsMember
Commercial Real Estate [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 322,006us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 325,397us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Commercial Real Estate [Member] | Owner-Occupied [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 100,859us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_OwnerOccupiedMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 111,290us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_OwnerOccupiedMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Commercial Real Estate [Member] | Non-owner Occupied [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 144,301us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_NonOwnerOccupiedMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 135,953us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_NonOwnerOccupiedMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Commercial Real Estate [Member] | Multi - Family [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 27,531us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_MultiFamilyMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 22,882us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_MultiFamilyMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Commercial Real Estate [Member] | Non-owner Occupied Residential [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 49,315us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_NonOwnerOccupiedResidentialMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 55,272us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_NonOwnerOccupiedResidentialMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Acquisition and Development [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 30,161us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_AcquisitionAndDevelopmentPortfolioSegmentMember		 22,778us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_AcquisitionAndDevelopmentPortfolioSegmentMember
Acquisition and Development [Member] | 1-4 Family Residential Construction [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 5,924us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_OneToFourFamilyResidentialConstructionMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_AcquisitionAndDevelopmentPortfolioSegmentMember		 3,338us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_OneToFourFamilyResidentialConstructionMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_AcquisitionAndDevelopmentPortfolioSegmentMember
Acquisition and Development [Member] | Commercial and Land Development [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 24,237us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_CommercialAndLandDevelopmentMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_AcquisitionAndDevelopmentPortfolioSegmentMember		 19,440us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_CommercialAndLandDevelopmentMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_AcquisitionAndDevelopmentPortfolioSegmentMember
Residential Mortgage [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 236,702us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember		 222,236us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
Residential Mortgage [Member] | First Lien [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 126,491us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_FirstLienMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember		 124,728us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_FirstLienMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
Residential Mortgage [Member] | Home Equity - Term [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 20,845us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_HomeEquityTermMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember		 20,131us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_HomeEquityTermMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
Residential Mortgage [Member] | Home Equity - Lines of Credit [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 89,366us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember		 77,377us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
Pass [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 647,601us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember		 593,361us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
Pass [Member] | Commercial and Industrial [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 43,794us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_CommercialAndIndustrialPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember		 28,933us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_CommercialAndIndustrialPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
Pass [Member] | Municipal [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 61,191us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_MunicipalMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember		 60,996us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_MunicipalMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
Pass [Member] | Installment and Other Loans [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 5,865us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_AllOtherSegmentsMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember		 6,184us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_AllOtherSegmentsMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
Pass [Member] | Commercial Real Estate [Member] | Owner-Occupied [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 89,815us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_OwnerOccupiedMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 92,063us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_OwnerOccupiedMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Pass [Member] | Commercial Real Estate [Member] | Non-owner Occupied [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 120,829us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_NonOwnerOccupiedMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 107,113us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_NonOwnerOccupiedMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Pass [Member] | Commercial Real Estate [Member] | Multi - Family [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 24,803us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_MultiFamilyMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 20,091us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_MultiFamilyMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Pass [Member] | Commercial Real Estate [Member] | Non-owner Occupied Residential [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 43,020us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_NonOwnerOccupiedResidentialMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 42,007us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_NonOwnerOccupiedResidentialMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Pass [Member] | Acquisition and Development [Member] | 1-4 Family Residential Construction [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 5,924us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_OneToFourFamilyResidentialConstructionMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_AcquisitionAndDevelopmentPortfolioSegmentMember		 3,292us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_OneToFourFamilyResidentialConstructionMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_AcquisitionAndDevelopmentPortfolioSegmentMember
Pass [Member] | Acquisition and Development [Member] | Commercial and Land Development [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 22,261us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_CommercialAndLandDevelopmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_AcquisitionAndDevelopmentPortfolioSegmentMember		 14,118us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_CommercialAndLandDevelopmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_AcquisitionAndDevelopmentPortfolioSegmentMember
Pass [Member] | Residential Mortgage [Member] | First Lien [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 121,160us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_FirstLienMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember		 121,353us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_FirstLienMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
Pass [Member] | Residential Mortgage [Member] | Home Equity - Term [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 20,775us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_HomeEquityTermMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember		 20,024us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_HomeEquityTermMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
Pass [Member] | Residential Mortgage [Member] | Home Equity - Lines of Credit [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 88,164us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember		 77,187us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
Special Mention [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 29,123us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember		 20,885us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
Special Mention [Member] | Commercial and Industrial [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 850us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_CommercialAndIndustrialPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember		 2,129us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_CommercialAndIndustrialPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
Special Mention [Member] | Municipal [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_MunicipalMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember		 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_MunicipalMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
Special Mention [Member] | Installment and Other Loans [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_AllOtherSegmentsMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember		 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_AllOtherSegmentsMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
Special Mention [Member] | Commercial Real Estate [Member] | Owner-Occupied [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 2,686us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_OwnerOccupiedMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 3,305us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_OwnerOccupiedMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Special Mention [Member] | Commercial Real Estate [Member] | Non-owner Occupied [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 20,661us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_NonOwnerOccupiedMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 6,904us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_NonOwnerOccupiedMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Special Mention [Member] | Commercial Real Estate [Member] | Multi - Family [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 1,086us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_MultiFamilyMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 2,132us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_MultiFamilyMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Special Mention [Member] | Commercial Real Estate [Member] | Non-owner Occupied Residential [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 2,968us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_NonOwnerOccupiedResidentialMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 4,982us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_NonOwnerOccupiedResidentialMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Special Mention [Member] | Acquisition and Development [Member] | 1-4 Family Residential Construction [Member]    
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 [Member] | Acquisition and Development [Member] | Commercial and Land Development [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 233us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_CommercialAndLandDevelopmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_AcquisitionAndDevelopmentPortfolioSegmentMember		 1,433us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_CommercialAndLandDevelopmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_AcquisitionAndDevelopmentPortfolioSegmentMember
Special Mention [Member] | Residential Mortgage [Member] | First Lien [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 9us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_FirstLienMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember		 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_FirstLienMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
Special Mention [Member] | Residential Mortgage [Member] | Home Equity - Term [Member]    
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 [Member] | Residential Mortgage [Member] | Home Equity - Lines of Credit [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 630us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember		 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
Non-Impaired Substandard [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 12,690us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= orrf_NonImpairedSubstandardMember		 31,456us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= orrf_NonImpairedSubstandardMember
Non-Impaired Substandard [Member] | Commercial and Industrial [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 1,914us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_CommercialAndIndustrialPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_NonImpairedSubstandardMember		 383us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_CommercialAndIndustrialPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_NonImpairedSubstandardMember
Non-Impaired Substandard [Member] | Municipal [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_MunicipalMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_NonImpairedSubstandardMember		 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_MunicipalMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_NonImpairedSubstandardMember
Non-Impaired Substandard [Member] | Installment and Other Loans [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_AllOtherSegmentsMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_NonImpairedSubstandardMember		 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_AllOtherSegmentsMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_NonImpairedSubstandardMember
Non-Impaired Substandard [Member] | Commercial Real Estate [Member] | Owner-Occupied [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 5,070us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_OwnerOccupiedMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_NonImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 11,360us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_OwnerOccupiedMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_NonImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Non-Impaired Substandard [Member] | Commercial Real Estate [Member] | Non-owner Occupied [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 1,131us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_NonOwnerOccupiedMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_NonImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 14,819us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_NonOwnerOccupiedMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_NonImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Non-Impaired Substandard [Member] | Commercial Real Estate [Member] | Multi - Family [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 1,322us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_MultiFamilyMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_NonImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 337us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_MultiFamilyMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_NonImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Non-Impaired Substandard [Member] | Commercial Real Estate [Member] | Non-owner Occupied Residential [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 1,827us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_NonOwnerOccupiedResidentialMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_NonImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 3,790us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_NonOwnerOccupiedResidentialMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_NonImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Non-Impaired Substandard [Member] | Acquisition and Development [Member] | 1-4 Family Residential Construction [Member]    
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		 46us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_OneToFourFamilyResidentialConstructionMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_NonImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_AcquisitionAndDevelopmentPortfolioSegmentMember
Non-Impaired Substandard [Member] | Acquisition and Development [Member] | Commercial and Land Development [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 1,333us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_CommercialAndLandDevelopmentMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_NonImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_AcquisitionAndDevelopmentPortfolioSegmentMember		 712us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_CommercialAndLandDevelopmentMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_NonImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_AcquisitionAndDevelopmentPortfolioSegmentMember
Non-Impaired Substandard [Member] | Residential Mortgage [Member] | First Lien [Member]    
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 [Member] | Residential Mortgage [Member] | Home Equity - Term [Member]    
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 [Member] | Residential Mortgage [Member] | Home Equity - Lines of Credit [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 93us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_NonImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember		 9us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_NonImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
Impaired - Substandard [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 15,500us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember		 24,696us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember
Impaired - Substandard [Member] | Commercial and Industrial [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 2,437us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_CommercialAndIndustrialPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember		 1,878us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_CommercialAndIndustrialPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember
Impaired - Substandard [Member] | Municipal [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_MunicipalMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember		 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_MunicipalMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember
Impaired - Substandard [Member] | Installment and Other Loans [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 26us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_AllOtherSegmentsMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember		 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_AllOtherSegmentsMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember
Impaired - Substandard [Member] | Commercial Real Estate [Member] | Owner-Occupied [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 3,288us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_OwnerOccupiedMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 4,107us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_OwnerOccupiedMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Impaired - Substandard [Member] | Commercial Real Estate [Member] | Non-owner Occupied [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 1,680us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_NonOwnerOccupiedMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 7,117us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_NonOwnerOccupiedMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Impaired - Substandard [Member] | Commercial Real Estate [Member] | Multi - Family [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 320us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_MultiFamilyMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 322us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_MultiFamilyMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Impaired - Substandard [Member] | Commercial Real Estate [Member] | Non-owner Occupied Residential [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 1,500us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_NonOwnerOccupiedResidentialMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 4,493us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_NonOwnerOccupiedResidentialMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Impaired - Substandard [Member] | Acquisition and Development [Member] | 1-4 Family Residential Construction [Member]    
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 [Member] | Acquisition and Development [Member] | Commercial and Land Development [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 410us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_CommercialAndLandDevelopmentMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_AcquisitionAndDevelopmentPortfolioSegmentMember		 3,177us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_CommercialAndLandDevelopmentMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= orrf_AcquisitionAndDevelopmentPortfolioSegmentMember
Impaired - Substandard [Member] | Residential Mortgage [Member] | First Lien [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 5,290us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_FirstLienMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember		 3,327us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_FirstLienMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
Impaired - Substandard [Member] | Residential Mortgage [Member] | Home Equity - Term [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 70us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_HomeEquityTermMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember		 94us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_HomeEquityTermMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
Impaired - Substandard [Member] | Residential Mortgage [Member] | Home Equity - Lines of Credit [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 479us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember		 181us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember
/ us-gaap_InternalCreditAssessmentAxis
= orrf_ImpairedSubstandardMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
Doubtful [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 32us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember		 639us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
Doubtful [Member] | Commercial and Industrial [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_CommercialAndIndustrialPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember		 123us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_CommercialAndIndustrialPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
Doubtful [Member] | Municipal [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_MunicipalMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember		 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= orrf_MunicipalMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
Doubtful [Member] | Installment and Other Loans [Member]    
Bank's ratings based on its internal risk rating system    
Total Loans 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_AllOtherSegmentsMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember		 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_AllOtherSegmentsMember
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Bank's ratings based on its internal risk rating system    
Total Loans 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
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Bank's ratings based on its internal risk rating system    
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Bank's ratings based on its internal risk rating system    
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Bank's ratings based on its internal risk rating system    
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Bank's ratings based on its internal risk rating system    
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Bank's ratings based on its internal risk rating system    
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Bank's ratings based on its internal risk rating system    
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Bank's ratings based on its internal risk rating system    
Total Loans 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
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Bank's ratings based on its internal risk rating system    
Total Loans $ 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
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