XML 39 R35.htm IDEA: XBRL DOCUMENT v2.4.1.9
Note 5 - Fair Value of Financial Instruments (Details) - Fair Value of Long-term Debt Approximates its Carrying Amount, Exceptions (USD $)
In Millions, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Senior Secured Notes:    
Loan from institutional investors $ 8.3ora_OtherLongTermDebtFairValueDisclosure $ 10.0ora_OtherLongTermDebtFairValueDisclosure
Olkaria III - DEG [Member]    
Senior Secured Notes:    
Loan from institutional investors 32.6ora_OtherLongTermDebtFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= ora_OlkariaIIIDEGMember		 32.2ora_OtherLongTermDebtFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= ora_OlkariaIIIDEGMember
Olkaria III - OPIC [Member]    
Senior Secured Notes:    
Loan from institutional investors 277.5ora_OtherLongTermDebtFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= ora_OlkariaIIIOPICMember		 279.4ora_OtherLongTermDebtFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= ora_OlkariaIIIOPICMember
Ormat Funding Corp [Member]    
Senior Secured Notes:    
Loan from institutional investors 72.7ora_OtherLongTermDebtFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= ora_OrmatFundingCorpMember		 71.4ora_OtherLongTermDebtFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= ora_OrmatFundingCorpMember
Orcal Geothermal Inc [Member]    
Senior Secured Notes:    
Loan from institutional investors 56.5ora_OtherLongTermDebtFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= ora_OrcalGeothermalIncMember		 55.5ora_OtherLongTermDebtFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= ora_OrcalGeothermalIncMember
OFC Two Senior Secured Notes [Member]    
Senior Secured Notes:    
Loan from institutional investors 239.5ora_OtherLongTermDebtFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= ora_OFCTwoSeniorSecuredNotesMember		 238.8ora_OtherLongTermDebtFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= ora_OFCTwoSeniorSecuredNotesMember
Senior Unsecured Bonds Member    
Senior Secured Notes:    
Loan from institutional investors 263.8ora_OtherLongTermDebtFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= ora_SeniorUnsecuredBondsMember		 265.4ora_OtherLongTermDebtFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= ora_SeniorUnsecuredBondsMember
Institutional Investors [Member]    
Senior Secured Notes:    
Loan from institutional investors 10.2ora_OtherLongTermDebtFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= ora_InstitutionalInvestorsMember		 12.2ora_OtherLongTermDebtFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= ora_InstitutionalInvestorsMember
Estimate of Fair Value Measurement [Member] | Olkaria III - DEG [Member]    
Note 5 - Fair Value of Financial Instruments (Details) - Fair Value of Long-term Debt Approximates its Carrying Amount, Exceptions [Line Items]    
Loan 32.6us-gaap_LoansPayableFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= ora_OlkariaIIIDEGMember
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember		 32.2us-gaap_LoansPayableFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= ora_OlkariaIIIDEGMember
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember
Estimate of Fair Value Measurement [Member] | Olkaria III - OPIC [Member]    
Note 5 - Fair Value of Financial Instruments (Details) - Fair Value of Long-term Debt Approximates its Carrying Amount, Exceptions [Line Items]    
Loan 277.5us-gaap_LoansPayableFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= ora_OlkariaIIIOPICMember
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember		 279.4us-gaap_LoansPayableFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= ora_OlkariaIIIOPICMember
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember
Estimate of Fair Value Measurement [Member] | Ormat Funding Corp [Member]    
Senior Secured Notes:    
Senior Secured Notes 72.7us-gaap_NotesPayableFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= ora_OrmatFundingCorpMember
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember		 71.4us-gaap_NotesPayableFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= ora_OrmatFundingCorpMember
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember
Estimate of Fair Value Measurement [Member] | Orcal Geothermal Inc [Member]    
Senior Secured Notes:    
Senior Secured Notes 56.5us-gaap_NotesPayableFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= ora_OrcalGeothermalIncMember
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember		 55.5us-gaap_NotesPayableFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= ora_OrcalGeothermalIncMember
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember
Estimate of Fair Value Measurement [Member] | OFC Two Senior Secured Notes [Member]    
Senior Secured Notes:    
Senior Secured Notes 239.5us-gaap_NotesPayableFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= ora_OFCTwoSeniorSecuredNotesMember
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember		 238.8us-gaap_NotesPayableFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= ora_OFCTwoSeniorSecuredNotesMember
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember
Estimate of Fair Value Measurement [Member] | Senior Unsecured Bonds Member    
Senior Secured Notes:    
Senior Unsecured Bonds 263.8us-gaap_LongTermDebtFairValue
/ us-gaap_DebtInstrumentAxis
= ora_SeniorUnsecuredBondsMember
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember		 265.4us-gaap_LongTermDebtFairValue
/ us-gaap_DebtInstrumentAxis
= ora_SeniorUnsecuredBondsMember
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember
Estimate of Fair Value Measurement [Member] | Institutional Investors [Member]    
Senior Secured Notes:    
Loan from institutional investors 10.2ora_OtherLongTermDebtFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= ora_InstitutionalInvestorsMember
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember		 12.2ora_OtherLongTermDebtFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= ora_InstitutionalInvestorsMember
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember
Reported Value Measurement [Member] | Olkaria III - DEG [Member]    
Note 5 - Fair Value of Financial Instruments (Details) - Fair Value of Long-term Debt Approximates its Carrying Amount, Exceptions [Line Items]    
Loan 31.6us-gaap_LoansPayableFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= ora_OlkariaIIIDEGMember
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember		 31.6us-gaap_LoansPayableFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= ora_OlkariaIIIDEGMember
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember
Reported Value Measurement [Member] | Olkaria III - OPIC [Member]    
Note 5 - Fair Value of Financial Instruments (Details) - Fair Value of Long-term Debt Approximates its Carrying Amount, Exceptions [Line Items]    
Loan 278.1us-gaap_LoansPayableFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= ora_OlkariaIIIOPICMember
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember		 282.6us-gaap_LoansPayableFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= ora_OlkariaIIIOPICMember
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember
Reported Value Measurement [Member] | Ormat Funding Corp [Member]    
Senior Secured Notes:    
Senior Secured Notes 67.2us-gaap_NotesPayableFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= ora_OrmatFundingCorpMember
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember		 67.2us-gaap_NotesPayableFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= ora_OrmatFundingCorpMember
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember
Reported Value Measurement [Member] | Orcal Geothermal Inc [Member]    
Senior Secured Notes:    
Senior Secured Notes 55.1us-gaap_NotesPayableFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= ora_OrcalGeothermalIncMember
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember		 55.1us-gaap_NotesPayableFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= ora_OrcalGeothermalIncMember
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember
Reported Value Measurement [Member] | OFC Two Senior Secured Notes [Member]    
Senior Secured Notes:    
Senior Secured Notes 270.1us-gaap_NotesPayableFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= ora_OFCTwoSeniorSecuredNotesMember
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember		 272.5us-gaap_NotesPayableFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= ora_OFCTwoSeniorSecuredNotesMember
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember
Reported Value Measurement [Member] | Senior Unsecured Bonds Member    
Senior Secured Notes:    
Senior Unsecured Bonds 250.2us-gaap_LongTermDebtFairValue
/ us-gaap_DebtInstrumentAxis
= ora_SeniorUnsecuredBondsMember
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember		 250.4us-gaap_LongTermDebtFairValue
/ us-gaap_DebtInstrumentAxis
= ora_SeniorUnsecuredBondsMember
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember
Reported Value Measurement [Member] | Institutional Investors [Member]    
Senior Secured Notes:    
Loan from institutional investors $ 10.0ora_OtherLongTermDebtFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= ora_InstitutionalInvestorsMember
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember		 $ 11.9ora_OtherLongTermDebtFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= ora_InstitutionalInvestorsMember
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember