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FINANCIAL INSTRUMENTS WITH OFF-BALANCE-SHEET RISK - Commitments and Conditional Obligations (Detail) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Revolving, Open Ended Home Equity Loans [Member] |  |
Commitments and conditional obligations |  |
Contract or Notional Amount | $ 100,897 us-gaap_FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability / us-gaap_FinancialInstrumentAxis = orrf_RevolvingOpenEndedHomeEquityLoansMember | $ 86,253 us-gaap_FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability / us-gaap_FinancialInstrumentAxis = orrf_RevolvingOpenEndedHomeEquityLoansMember
1-4 Family Residential Construction Loans [Member] |  |
Commitments and conditional obligations |  |
Contract or Notional Amount | 2,463 us-gaap_FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability / us-gaap_FinancialInstrumentAxis = orrf_OneToFourFamilyResidentialConstructionLoansMember | 2,657 us-gaap_FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability / us-gaap_FinancialInstrumentAxis = orrf_OneToFourFamilyResidentialConstructionLoansMember
Commercial Real Estate, Construction and Land Development Loans [Member] |  |
Commitments and conditional obligations |  |
Contract or Notional Amount | 11,682 us-gaap_FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability / us-gaap_FinancialInstrumentAxis = orrf_CommercialRealEstateConstructionAndLandDevelopmentLoansMember | 2,961 us-gaap_FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability / us-gaap_FinancialInstrumentAxis = orrf_CommercialRealEstateConstructionAndLandDevelopmentLoansMember
Commercial, Industrial and Other Loans [Member] |  |
Commitments and conditional obligations |  |
Contract or Notional Amount | 71,483 us-gaap_FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability / us-gaap_FinancialInstrumentAxis = orrf_CommercialIndustrialAndOtherLoansMember | 45,629 us-gaap_FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability / us-gaap_FinancialInstrumentAxis = orrf_CommercialIndustrialAndOtherLoansMember
Standby Letters of Credit [Member] |  |
Commitments and conditional obligations |  |
Contract or Notional Amount | $ 7,309 us-gaap_FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability / us-gaap_FinancialInstrumentAxis = us-gaap_StandbyLettersOfCreditMember | $ 6,267 us-gaap_FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability / us-gaap_FinancialInstrumentAxis = us-gaap_StandbyLettersOfCreditMember

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- Definition The face amount of financial liabilities, which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition. + References No definition available. + Details
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