XML 134 R113.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Note 24 - Subsequent Events (Details Textual) $ / shares in Units, $ in Thousands, ₪ in Millions |  |  |  |  |  |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
May 21, 2018 USD ($) | May 21, 2018 ILS (₪) | May 07, 2018 USD ($) $ / shares | Apr. 30, 2018 USD ($) MWh | Apr. 24, 2018 USD ($) | Mar. 22, 2018 USD ($) | Mar. 01, 2018 USD ($) $ / shares | Jan. 24, 2018 USD ($) MWh $ / shares | Dec. 31, 2017 USD ($) $ / shares | Dec. 31, 2016 USD ($) $ / shares | Dec. 31, 2015 USD ($) $ / shares | May 17, 2018 USD ($) | May 03, 2018 USD ($)
Dividends, Common Stock, Total |  |  |  |  |  |  |  |  | $ 20,511 | $ 25,682 | $ 12,716 |  |
Common Stock, Dividends, Per Share, Declared | $ / shares |  |  |  |  |  |  |  |  | $ 0.41 | $ 0.52 | $ 0.26 |  |
Property, Plant and Equipment, Net, Ending Balance |  |  |  |  |  |  |  |  | $ 1,734,691 | $ 1,556,378 |  |  |
Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends, Common Stock, Total |  |  | $ 5,100 |  |  |  | $ 11,500 |  |  |  |  |  |
Common Stock, Dividends, Per Share, Declared | $ / shares |  |  | $ 0.10 |  |  |  | $ 0.23 |  |  |  |  |  |
Dividends Payable, Date of Record |  |  | May 21, 2018 |  |  |  | Mar. 14, 2018 |  |  |  |  |  |
Dividends Payable, Date to be Paid |  |  | May 30, 2018 |  |  |  | Mar. 29, 2018 |  |  |  |  |  |
Subsequent Event [Member] | Platanares [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Non-recourse Finacing Agreement, Term |  |  |  | 14 years |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Migdal Loan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  | 4.80% |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  |  | $ 100,000 |  |  |  |  |  |  |
Debt Instrument, Periodic Payment, Total |  |  |  |  |  | 4,200 |  |  |  |  |  |  |
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid |  |  |  |  |  | $ 37,000 |  |  |  |  |  |  |
Debt Instrument Increase in Stated Interest Rate if Rating is Downgraded to ILA Negative |  |  |  |  |  | 0.50% |  |  |  |  |  |  |
Debt Instrument Increase in Stated Interest Rate Each Additional Downgrade |  |  |  |  |  | 0.25% |  |  |  |  |  |  |
Debt Instrument Decrease in Stated Interest Rate for Each Rating Upgrade |  |  |  |  |  | 0.25% |  |  |  |  |  |  |
Debt to EBITDA Ratio Threshold for Rate Increase |  |  |  |  |  | 4.5 |  |  |  |  |  |  |
Debt Instrument Increase in Stated Interest Rate if Debt to EBITDA Ratio Exceeds Threshold |  |  |  |  |  | 0.50% |  |  |  |  |  |  |
Debt to EBITDA Ratio Requirement |  |  |  |  |  | 6 |  |  |  |  |  |  |
Stockholders Equity, Debt Covenant, Minimum Threshold |  |  |  |  |  | $ 650,000 |  |  |  |  |  |  |
Stockholders Equity to Total Assets, Ratio |  |  |  |  |  | 25.00% |  |  |  |  |  |  |
Stockholders Equity, Debt Covenant, Minimum Threshold to Pay Dividends |  |  |  |  |  | $ 800,000 |  |  |  |  |  |  |
Dividends to Net Income, Ratio |  |  |  |  |  | 50.00% |  |  |  |  |  |  |
Subsequent Event [Member] | Migdal Loan [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  | 4.80% |  |  |  |  |  |  |
Subsequent Event [Member] | Migdal Loan [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Increase in Stated Interest Rate |  |  |  |  |  | 1.00% |  |  |  |  |  |  |
Subsequent Event [Member] | Platanares [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Current Power Generation | MWh |  |  |  | 35 |  |  |  |  |  |  |  |  |
Non-recourse Financing Agreement |  |  |  | $ 124,700 |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Platanares [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 6.75% |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Platanares [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 7.25% |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Tungsten Mountain [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Parternship Agreement, Initial Purchase Price |  |  |  |  |  |  |  |  |  |  |  | $ 33,400 |
Partnership Agreement, Expected Additional Installments |  |  |  |  |  |  |  |  |  |  |  | $ 13,000 |
Subsequent Event [Member] | Puna Geothermal Power Plant [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment, Net, Ending Balance |  |  |  |  |  |  |  |  |  |  |  |  | $ 109,000
Subsequent Event [Member] | Heit vs Ormat Technologies, Inc. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingency, Damages Sought, Value | $ 26,000 | ₪ 93 |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | U.S. Geothermal [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Expected Power Generating Capacity | MWh |  |  |  |  |  |  |  | 45 |  |  |  |  |
Current Power Generation | MWh |  |  |  |  |  |  |  | 38 |  |  |  |  |
Subsequent Event [Member] | U.S. Geothermal [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Share Price | $ / shares |  |  |  |  |  |  |  | $ 5.45 |  |  |  |  |
Business Combination, Consideration Transferred, Total |  |  |  |  |  |  |  | $ 109,900 |  |  |  |  |
Payments to Acquire Businesses, Gross |  |  |  |  | $ 110,000 |  |  |  |  |  |  |  |
Payments to Settle Outstanding In-the-money Options by Acquiree |  |  |  |  | 4,000 |  |  |  |  |  |  |  |
Subsequent Event [Member] | U.S. Geothermal [Member] | Ormat Nevada Inc. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Gross |  |  |  |  | $ 106,000 |  |  |  |  |  |  |  |

X
- Definition The amount of current power generation during the period. + References No definition available. + Details
Name: | ora_CurrentPowerGeneration
Namespace Prefix: | ora_
Data Type: | num:energyItemType
Balance Type: | na
Period Type: | duration

X
- Definition The decrease in stated interest rate for a debt instrument for each upgrade of the company's rating. + References No definition available. + Details
Name: | ora_DebtInstrumentDecreaseInStatedInterestRateForEachRatingUpgrade
Namespace Prefix: | ora_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of increase in stated interest rate due to certain circumstances. + References No definition available. + Details
Name: | ora_DebtInstrumentIncreaseInStatedInterestRate
Namespace Prefix: | ora_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The increase in the stated interest rate of the debt instrument with each additional downgrade of the company's rating. + References No definition available. + Details
Name: | ora_DebtInstrumentIncreaseInStatedInterestRateEachAdditionalDowngrade
Namespace Prefix: | ora_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The increase in the stated interest rate of a debt instrument if debt to EBITDA ratio exceeds threshold. + References No definition available. + Details
Name: | ora_DebtInstrumentIncreaseInStatedInterestRateIfDebtToEbitdaRatioExceedsThreshold
Namespace Prefix: | ora_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The increase in the stated interest rate of a debt instrument if company rating is downgraded to ILA negative. + References No definition available. + Details
Name: | ora_DebtInstrumentIncreaseInStatedInterestRateIfRatingIsDowngradedToILANegative
Namespace Prefix: | ora_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The debt to EBITDA ratio requirement applicable to certain agreements. + References No definition available. + Details
Name: | ora_DebtToEBITDARatioRequirement
Namespace Prefix: | ora_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition The debt to EBITDA ratio threshold for rate increases. + References No definition available. + Details
Name: | ora_DebtToEBITDARatioThresholdForRateIncrease
Namespace Prefix: | ora_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition The ratio for the amounts of dividends to net income. + References No definition available. + Details
Name: | ora_DividendsToNetIncomeRatio
Namespace Prefix: | ora_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Expected power generating capacity. + References No definition available. + Details
Name: | ora_ExpectedPowerGeneratingCapacity
Namespace Prefix: | ora_
Data Type: | num:energyItemType
Balance Type: | na
Period Type: | duration

X
- Definition The term of a non-recourse financing agreement. + References No definition available. + Details
Name: | ora_NonrecourseFinacingAgreementTerm
Namespace Prefix: | ora_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of a non-recourse financing agreement. + References No definition available. + Details
Name: | ora_NonrecourseFinancingAgreement
Namespace Prefix: | ora_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The initial purchase price of the power plant that sold to a private investor by the company. + References No definition available. + Details
Name: | ora_ParternshipAgreementInitialPurchasePrice
Namespace Prefix: | ora_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of additional installments that are expected to be paid by the buyer pursuant to the partnership agreement. + References No definition available. + Details
Name: | ora_PartnershipAgreementExpectedAdditionalInstallments
Namespace Prefix: | ora_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of cash paid by the acquiree to settle the outstanding in-the-money options. + References No definition available. + Details
Name: | ora_PaymentsToSettleOutstandingInTheMoneyOptionsByAcquiree
Namespace Prefix: | ora_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The stockholders equity minimum threshold amount in relation to a debt covenant. + References No definition available. + Details
Name: | ora_StockholdersEquityDebtCovenantMinimumThreshold
Namespace Prefix: | ora_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The minimum threshold of stockholders equity related to a debt covenant to pay dividends. + References No definition available. + Details
Name: | ora_StockholdersEquityDebtCovenantMinimumThresholdToPayDividends
Namespace Prefix: | ora_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The ratio of stockholders equity, excluding noncontrolling interest, to total assets. + References No definition available. + Details
Name: | ora_StockholdersEquityToTotalAssetsRatio
Namespace Prefix: | ora_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Price of a single share of a number of saleable stocks paid or offered to be paid in a business combination. + References No definition available. + Details
Name: | us-gaap_BusinessAcquisitionSharePrice
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=109124213&loc=d3e6613-128477 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=109124213&loc=d3e6578-128477 + Details
Name: | us-gaap_BusinessCombinationConsiderationTransferred1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
Name: | us-gaap_CommonStockDividendsPerShareDeclared
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 + Details
Name: | us-gaap_DebtInstrumentFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of the required periodic payments including both interest and principal payments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823 + Details
Name: | us-gaap_DebtInstrumentPeriodicPayment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of payment greater than the preceding installment payments to be paid at final maturity date of debt. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentPeriodicPaymentTermsBalloonPaymentToBePaid
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Date the declared dividend will be paid, in CCYY-MM-DD format. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586 + Details
Name: | us-gaap_DividendPayableDateToBePaidDayMonthAndYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of paid and unpaid common stock dividends declared with the form of settlement in cash, stock and payment-in-kind (PIK). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 405 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6957935&loc=d3e64057-112817 + Details
Name: | us-gaap_DividendsCommonStock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Date the holder must own the stock to be entitled to the dividend, in CCYY-MM-DD format. + References No definition available. + Details
Name: | us-gaap_DividendsPayableDateOfRecordDayMonthAndYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition The value (monetary amount) of the award the plaintiff seeks in the legal matter. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14557-108349 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14435-108349 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349 + Details
Name: | us-gaap_LossContingencyDamagesSoughtValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585 + Details
Name: | us-gaap_PaymentsToAcquireBusinessesGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(14)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(8)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(13)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_PropertyPlantAndEquipmentNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=ora_PlatanaresMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=ora_MigdalLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CounterpartyNameAxis=ora_PlatanaresMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis=ora_TungstenMountainMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis=ora_PunaGeothermalPowerPlantMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_LitigationCaseAxis=ora_HeitVSOrmatTechnologiesIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=ora_USGeothermalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=ora_USGeothermalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=ora_OrmatNevadaIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |