Ormat (ORA) 10-Q 8 May 19 2019 Q1 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	3 Months Ended
	Mar. 31, 2019	May 06, 2019
Document Information [Line Items]
Entity Registrant Name	ORMAT TECHNOLOGIES, INC.
Entity Central Index Key	0001296445
Trading Symbol	ora
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Current Reporting Status	Yes
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Common Stock, Shares Outstanding (in shares)		50,752,101
Document Type	10-Q
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Amendment Flag	false

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands		Mar. 31, 2019		Dec. 31, 2018
Current assets:
Cash and cash equivalents		$ 79,366		$ 98,802
Restricted cash and cash equivalents (primarily related to VIEs)		93,098		78,693
Receivables:
Trade		139,870		137,581
Other		18,319		19,393
Inventories		42,982		45,024
Costs and estimated earnings in excess of billings on uncompleted contracts	[1]	29,762		42,130
Prepaid expenses and other		18,224		51,441
Total current assets		421,621		473,064
Investment in an unconsolidated company		71,885		71,983
Deposits and other		18,154		18,209
Deferred income taxes		109,821		113,760
Property, plant and equipment, net		1,962,580		1,959,578
Construction-in-process		266,083		261,690
Operating leases right of use		60,656
Finance leases right of use		14,433
Deferred financing and lease costs, net		1,733		3,242
Intangible assets, net		196,125		199,874
Goodwill		20,123		19,950
Total assets		3,143,214	[2]	3,121,350
Current liabilities:
Accounts payable and accrued expenses		108,309		116,362
Short term revolving credit lines with banks (full recourse)		60,900		159,000
Billings in excess of costs and estimated earnings on uncompleted contracts		15,508		18,402
Current portion of long-term debt:
Senior secured notes		33,639		33,493
Other loans		29,687		29,687
Full recourse		9,368		5,000
Operating lease liabilities		7,532
Finance lease liabilities		3,147
Total current liabilities		268,090		361,944
Long-term debt, net of current portion:
Senior secured notes (less deferred financing costs of $7,149 and $7,434, respectively)		367,142		375,337
Other loans (less deferred financing costs of $9,262 and $9,354, respectively)		312,779		320,242
Senior unsecured bonds (less deferred financing costs of $706 and $758, respectively)		353,626		303,575
Other loans (less deferred financing costs of $1,483 and $921, respectively)		78,149		41,579
Operating lease liabilities		17,667
Finance lease liabilities		11,954
Liability associated with sale of tax benefits		68,852		69,893
Deferred lease income		47,658		48,433
Deferred income taxes		68,005		61,323
Liability for unrecognized tax benefits		12,482		11,769
Liabilities for severance pay		18,400		17,994
Asset retirement obligation		41,246		39,475
Other long-term liabilities		5,464		16,087
Total liabilities		1,671,514		1,667,651
Commitments and contingencies (Note 10)
Redeemable noncontrolling interest		8,705		8,603
Equity:
Common stock, par value $0.001 per share; 200,000,000 shares authorized; 50,752,101 and 50,699,781 shares issued and outstanding as of March 31, 2019 and December 31, 2018, respectively		51		51
Additional paid-in capital		903,723		901,363
Retained earnings		442,531		422,222
Accumulated other comprehensive income (loss)		(5,956)		(3,799)
Total stockholders' equity attributable to Company's stockholders		1,340,349		1,319,837
Noncontrolling interest		122,646		125,259
Total equity		1,462,995		1,445,096
Total liabilities, redeemable noncontrolling interest and equity		$ 3,143,214		$ 3,121,350
[1]	Contract assets and contract liabilities are presented as "Costs and estimated earnings in excess of billings on uncompleted contracts" and "Billings in excess of costs and estimated earnings on uncompleted contracts", respectively, on the consolidated balance sheet.
[2]	Electricity segment assets include goodwill in the amount of $20.1 million and $7.8 million as of March 31, 2019 and 2018, respectively. Other segment assets include goodwill in the amount of $13.5 million as of March 31, 2018. No goodwill is included in the Other segments assets as of March 31, 2019.

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Property, plant and equipment, net	$ 1,962,580	$ 1,959,578
Construction-in-process	266,083	261,690
Finance leases right of use	$ 14,433
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	200,000,000	200,000,000
Common stock, shares issued (in shares)	50,752,101	50,699,781
Common stock, shares outstanding (in shares)	50,752,101	50,699,781
Senior Secured Notes [Member]
Deferred financing costs	$ 7,149	$ 7,434
Other Loans, Limited and Non-recourse [Member]
Deferred financing costs	9,262	9,354
Senior Unsecured Bonds [Member]
Deferred financing costs	706	758
Other Loans, Full Recourse [Member]
Deferred financing costs	1,483	921
Variable Interest Entity, Primary Beneficiary [Member]
Property, plant and equipment, net	1,843,823	1,859,228
Construction-in-process	110,907	$ 104,085
Finance leases right of use	$ 8,396

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenues:
Revenues	$ 199,038	$ 184,023
Cost of revenues:
Cost of revenues	124,859	110,651
Gross profit	74,179	73,372
Operating expenses:
Research and development expenses	900	1,108
Selling and marketing expenses	3,865	3,699
General and administrative expenses	15,689	13,849
Write-off of unsuccessful exploration activities	0	123
Operating income	53,725	54,593
Other income (expense):
Interest income	293	113
Interest expense, net	(21,223)	(14,344)
Derivatives and foreign currency transaction gains (losses)	472	(1,599)
Income attributable to sale of tax benefits	7,764	7,361
Other non-operating income (expense), net	91	(20)
Income from operations before income tax and equity in earnings (losses) of investees	41,122	46,104
Income tax (provision) benefit	(14,039)	26,942
Equity in earnings (losses) of investees, net	1,047	1,210
Net income	28,130	74,256
Net income attributable to noncontrolling interest	(2,184)	(4,748)
Net income attributable to the Company's stockholders	25,946	69,508
Comprehensive income:
Net income	28,130	74,256
Other comprehensive income (loss), net of related taxes:
Change in foreign currency translation adjustments	(1,348)	1,528
Change in unrealized gains or losses in respect of the Company's share in derivatives instruments of unconsolidated investment	(1,145)	2,634
Loss in respect of derivative instruments designated for cash flow hedge	22	20
Amortization of unrealized gains in respect of derivative instruments designated for cash flow hedge	(8)	(15)
Comprehensive income	25,651	78,423
Comprehensive income attributable to noncontrolling interest	(1,862)	(5,118)
Comprehensive income attributable to the Company's stockholders	$ 23,789	$ 73,305
Basic:
Net income (in dollars per share)	$ 0.51	$ 1.37
Diluted:
Net income (in dollars per share)	$ 0.51	$ 1.36
Weighted average number of shares used in computation of earnings per share attributable to the Company's stockholders:
Basic (in shares)	50,709	50,614
Diluted (in shares)	51,012	51,051
Electricity [Member]
Revenues:
Revenue	$ 142,908	$ 132,489
Cost of revenues:
Cost of revenues	77,543	73,482
Product [Member]
Revenues:
Revenue	52,128	48,672
Cost of revenues:
Cost of revenues	42,106	33,726
Other Revenue [Member]
Revenues:
Revenue	4,002	2,862
Cost of revenues:
Cost of revenues	$ 5,210	$ 3,443

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Parent [Member]	Noncontrolling Interest [Member]	Total
Balance (in shares) at Dec. 31, 2017	50,609
Balance at Dec. 31, 2017	$ 51	$ 888,778	$ 327,255	$ (4,706)	$ 1,211,378	$ 84,322	$ 1,295,700
Cumulative effect of changes in accounting principles at Dec. 31, 2017			25,635		25,635		25,635
Adjusted balance as of the beginning of the year at Dec. 31, 2017	51	888,778	352,890	(4,706)	1,237,013	84,322	1,321,335
Stock-based compensation		1,707			1,707		1,707
Exercise of options by employees and directors (in shares)	8
Exercise of options by employees and directors
Cash paid to noncontrolling interest						(4,674)	(4,674)
Cash dividend declared			(11,640)		(11,640)		(11,640)
Net income			69,508		69,508	4,482	73,990
Currency translation adjustment				1,158	1,158	370	1,528
Loss in respect of derivative instruments designated for cash flow hedge				20	20		20
Change in unrealized gains or losses in respect of the Company's share in derivative instruments of unconsolidated investment				2,634	2,634		2,634
Amortization of unrealized gains in respect of derivative instruments designated for cash flow hedge				(15)	(15)		(15)
Balance (in shares) at Mar. 31, 2018	50,617
Balance at Mar. 31, 2018	$ 51	890,485	410,758	(909)	1,300,385	84,500	1,384,885
Balance (in shares) at Dec. 31, 2018	50,700
Balance at Dec. 31, 2018	$ 51	901,363	422,222	(3,799)	1,319,837	125,259	1,445,096
Cumulative effect of changes in accounting principles at Dec. 31, 2018			(58)		(58)		(58)
Adjusted balance as of the beginning of the year at Dec. 31, 2018	51	901,363	422,164	(3,799)	1,319,779	125,259	1,445,038
Stock-based compensation		2,360			2,360		2,360
Exercise of options by employees and directors (in shares)	52
Exercise of options by employees and directors
Cash paid to noncontrolling interest						(4,146)	(4,146)
Cash dividend declared			(5,579)		(5,579)		(5,579)
Net income			25,946		25,946	1,855	27,801
Currency translation adjustment				(1,026)	(1,026)	(322)	(1,348)
Loss in respect of derivative instruments designated for cash flow hedge				22	22		22
Change in unrealized gains or losses in respect of the Company's share in derivative instruments of unconsolidated investment				(1,145)	(1,145)		(1,145)
Amortization of unrealized gains in respect of derivative instruments designated for cash flow hedge				(8)	(8)		(8)
Balance (in shares) at Mar. 31, 2019	50,752
Balance at Mar. 31, 2019	$ 51	$ 903,723	$ 442,531	$ (5,956)	$ 1,340,349	$ 122,646	$ 1,462,995

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Equity (Unaudited) (Parentheticals) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Retained Earnings [Member]
Cash dividend declared, per share (in dollars per share)	$ 0.11	$ 0.23
Amortization of unrealized gains, tax	$ 18	$ 9
Loss in respect of derivative instruments designated for cash flow hedge, related tax	24	13
Change in unrealized gains or losses in respect of the Company's share in derivative instruments of unconsolidated investment, tax.	$ 0	$ 0

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities:
Net income	$ 28,130	$ 74,256
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	36,901	30,553
Accretion of asset retirement obligation	651	529
Stock-based compensation	2,360	1,707
Amortization of deferred lease income	(775)	(775)
Income attributable to sale of tax benefits, net of interest expense	(4,314)	(6,295)
Equity in losses (earnings) of investees	(1,047)	(1,210)
Mark-to-market of derivative instruments	(1,209)	962
Loss on disposal of property, plant and equipment	377
Write-off of unsuccessful exploration activities	0	123
Loss (gain) on severance pay fund asset	(330)	129
Deferred income tax provision	10,469	(29,467)
Liability for unrecognized tax benefits	713	184
Changes in operating assets and liabilities, net of businesses acquired:
Receivables	(1,119)	9,777
Costs and estimated earnings in excess of billings on uncompleted contracts	12,368	(189)
Inventories	2,018	(503)
Prepaid expenses and other	(2,105)	(2,005)
Operating lease right of use asset	1,698
Deposits and other	26	62
Accounts payable and accrued expenses	(4,271)	(49,027)
Billings in excess of costs and estimated earnings on uncompleted contracts	(2,894)	(9,783)
Liabilities for severance pay	406	(267)
Other long-term liabilities	(616)	1,008
Net cash provided by operating activities	77,437	19,769
Cash flows from investing activities:
Capital expenditures	(51,303)	(66,962)
Investment in unconsolidated companies		(1,275)
Decrease (increase) in severance pay fund asset, net of payments made to retired employees	359	203
Net cash used in investing activities	(50,944)	(68,034)
Cash flows from financing activities:
Proceeds from long-term loans, net of transaction costs	91,500	100,000
Proceeds from revolving credit lines with banks	914,700	860,800
Repayment of revolving credit lines with banks	(1,012,800)	(873,800)
Cash received from noncontrolling interest	3,346	4,134
Repayments of long-term debt	(15,757)	(16,687)
Cash paid to noncontrolling interest	(4,459)	(4,674)
Payments of finance leases	(767)	(436)
Deferred debt issuance costs	(1,223)	(1,020)
Cash dividends paid	(5,579)	(11,640)
Net cash provided by (used in) financing activities	(31,039)	56,677
Effect of exchange rate changes	(485)
Net change in cash and cash equivalents and restricted cash and cash equivalents	(5,031)	8,412
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	177,495	96,643
Cash and cash equivalents and restricted cash and cash equivalents at end of period	172,464	105,055
Supplemental non-cash investing and financing activities:
Increase (decrease) in accounts payable related to purchases of property, plant and equipment	153	(1,673)
Accrued liabilities related to financing activities	$ 2,154

Note 1 - General and Basis of P

Note 1 - General and Basis of Presentation	3 Months Ended
	Mar. 31, 2019
Notes to Financial Statements
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	NOTE 1 These unaudited condensed consolidated interim financial statements of Ormat Technologies, Inc. and its subsidiaries (collectively, the “Company”) have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) and pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”) for interim financial statements. Accordingly, they do not March 31, 2019, three March 31, 2019 2018. The financial data and other information disclosed in the notes to the condensed consolidated financial statements related to these periods are unaudited. The results for the periods presented are not These condensed unaudited consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10 December 31, 2018. December 31, 2018 December 31, 2018 not Dollar amounts, except per share data, in the notes to these financial statements are rounded to the closest $1,000. Puna May 3, 2018, 38 three first 2019, $1.5 May 2018 first 2019, $1.3 three March 31, 2019. May 2018. April 2019 $4.1 The Company is still assessing the damages in the Puna facilities and continue to coordinate with Hawaii Electric Light Company (“HELCO”) and local authorities to bring the power plant back to operation. The Company continues to assess the accounting implications of this event on the assets and liabilities on its balance sheet and whether an impairment will be required. Any significant damage to the geothermal resource or continued shut-down following the lava event at the Puna facilities could have an adverse impact on the power plant's electricity generation and availability, which in turn could have a material adverse impact on our business and results of operations. DEG 3 On January 4, 2019, 4” $41.5 3 February 28, 2019, 4 6.04% 3 3 19 June 21, 2019, June 21, 2028. 3 4 1 3 1 3 3 Migdal Senior Unsecured Loan On March 25, 2019, first March 22, 2018. $50.0 15 $2.1 September 15, 2021, $18.5 March 15, 2029. 4.6% The Additional Migdal Loan was entered into under substantially the same terms and conditions of the Migdal Loan Agreement as disclosed in the Company’s Form 10 December 31, 2018. Write-offs of unsuccessful exploration activities There were no three March 31, 2019. three March 31, 2018 $0.1 Reconciliation of Cash and cash equivalents and Restricted cash and cash equivalents The following table provides a reconciliation of Cash and cash equivalents and Restricted cash and cash equivalents reported on the balance sheet that sum to the total of the same amounts shown on the statement of cash flows: March 31, December 31, March 31, 2019 2018 2018 (Dollars in thousands) Cash and cash equivalents $ 79,366 $ 98,802 $ 54,723 Restricted cash and cash equivalents 93,098 78,693 $ 50,332 Total Cash and cash equivalents and restricted cash and cash equivalents $ 172,464 $ 177,495 $ 105,055 Concentration of credit risk Financial instruments that potentially subject the Company to a concentration of credit risk consist principally of temporary cash investments and accounts receivable. The Company places its temporary cash investments with high credit quality financial institutions located in the United States (“U.S.”) and in foreign countries. At March 31, 2019 December 31, 2018, $28.6 $31.3 ten $250,000 March 31, 2019 December 31, 2018, $75.9 $93.9 At March 31, 2019 December 31, 2018, $106.8 $102.0 March 31, 2019 December 31, 2018, 55% 56% Sierra Pacific Power Company and Nevada Power Company (subsidiaries of NV Energy, Inc.) accounted for 18.2% 17.4% three March 31, 2019 2018, Southern California Public Power Authority (“SCPPA”) accounted for 19.4% 16.3% three March 31, 2019 2018, Kenya Power and Lighting Co. Ltd. accounted for 15.3% 15.1% three March 31, 2019 2018, We have historically been able to collect on substantially all of our receivable balances. Recently, we have been receiving late payments from KPLC in Kenya related to our Olkaria Complex and from ENNE in Honduras related to our Platanares power plant. As of March 31, 2019, $29.4 $18.0 $ 20.4 $3.0 April 2019. no Additionally, Pacific Gas and Electric Corporation (“PG&E Corporation”) and its subsidiary Pacific Gas and Electric Company (“PG&E”), which accounts for 1.2% three March 31, 2019, 2017 2018. January 29, 2019, 11 January 2019 not 11 February March Revenues from Contracts with Customers Contract assets related to our Product segment reflect revenue recognized and performance obligations satisfied in advance of customer billing. Contract liabilities related to our Product segment reflect payments received in advance of the satisfaction of performance under the contract. We receive payments from customers based on the terms established in our contracts. Total contract assets and contract liabilities as of March 31, 2019 December 31, 2018 March 31, December 31, 2019 2018 (Dollars in thousands) Contract assets (*) $ 29,762 $ 42,130 Contract liabilities (*) (15,508 ) (18,402 ) Contract assets, net $ 14,254 $ 23,728 (*) Contract assets and contract liabilities are presented as "Costs and estimated earnings in excess of billings on uncompleted contracts" and "Billings in excess of costs and estimated earnings on uncompleted contracts", respectively, on the consolidated balance sheets. On March 31, 2019, $226.1 not 100% 24

Note 2 - New Accounting Pronoun

Note 2 - New Accounting Pronouncements	3 Months Ended
	Mar. 31, 2019
Notes to Financial Statements
New Accounting Pronouncements and Changes in Accounting Principles [Text Block]	NOTE 2 New accounting pronouncements effective in the three March 31, 2019 Leases In February 2016, 2016 02, 842 two 606. January 1, 2019 no In accordance with the new standard, for agreements in which the Company is the lessee, the Company applies a unified accounting model by which it recognizes a right-of-use asset ("ROU") and a lease liability at the commencement date of the lease contract for all the leases in which the Company has a right to control identified assets for a specified period of time. The classification of the lease as a finance lease or an operating lease determines the subsequent accounting for the lease arrangement. Upon the adoption of the new standard the Company, both as a lessee and as a lessor, chose to apply the following permitted practical expedients: 1. Not 2. Not 840 840 3. Exclude initial direct costs from measurement of the ROU asset at the date of initial application; 4. Applying the practical expedient (for a lessor) to not 606 606. 5. Applying the practical expedient (for a lessee) regarding the recognition and measurement of short-term leases, for leases for a period of up to 12 Since the Company elected to apply the practical expedients above, it applied the new standard to all contracts entered into before January 1, 2019 840. The new significant accounting policies regarding leases that were applied as from January 1, 2019 1. Determining whether an arrangement contains a lease On the inception date of the lease, the Company determines whether the arrangement is a lease or contains a lease, while examining if it conveys the right to control the use of an identified asset for a period of time in exchange for consideration. 2. The Company as a lessee a. Lease classification: At the commencement date, a lease is a finance lease if it meets any one ● The lease transfers ownership of the underlying asset to the lessee by the end of the lease term. ● The lease grants the lessee an option to purchase the underlying asset that the lessee is reasonably certain to exercise. ● The lease term is for the major part of the remaining economic life of the underlying asset. ● The present value of the sum of the lease payments and any residual value guaranteed by the lessee that is not ● The underlying asset is of such a specialized nature that it is expected to have no b. Leased assets and lease liabilities - initial recognition Upon initial recognition, the Company recognizes a liability at the present value of the lease payments to be made over the lease term, and concurrently recognizes a ROU asset at the same amount of the liability, adjusted for any prepaid or accrued lease payments, plus initial direct costs incurred in respect of the lease. Since the interest rate implicit in the lease is not c. The lease term The lease term is the non-cancellable period of the lease plus periods covered by an extension or termination option if it is reasonably certain that the Company will exercise the option. d. Subsequent measurement of operating leases After lease commencement, the Company measures the lease liability at the present value of the remaining lease payments using the discount rate determined at lease commencement (as long as the discount rate hasn’t been updated as a result of a reassessment event). The Company subsequently measures the ROU asset at the present value of the remaining lease payments, adjusted for the remaining balance of any lease incentives received, any cumulative prepaid or accrued rent if the lease payments are uneven throughout the lease term and any unamortized initial direct costs. Further, the Company will recognize lease expense on a straight-line basis over the lease term. e. Subsequent measurement of finance leases After lease commencement, the Company measures the lease liability by increasing the carrying amount to reflect interest on the lease liability and reducing the carrying amount to reflect the lease payments made during the period. The Company shall determine the interest on the lease liability in each period during the lease term as the amount that produces a constant periodic discount rate on the remaining balance of the liability, taking into consideration the reassessment requirements. After lease commencement, the Company measures the ROU assets at cost less any accumulated amortization and any accumulated impairment losses, taking into consideration the reassessment requirements. The Company amortizes the ROU asset on a straight-line basis, unless another systematic basis better represents the pattern in which the Company expects to consume the ROU asset’s future economic benefits. The ROU asset is amortized over the shorter of the lease term or the useful life of the ROU asset as follows: (in years) Land 1 - 35 Automobiles 5 Building 15 The total periodic expense (the sum of interest and amortization expense) of a finance lease is typically higher in the early periods and lower in the later periods. f. Variable lease payments: Variable lease payments that depend on an index or a rate On the commencement date, the lease payments shall include variable lease payments that depend on an index or a rate (such as the Consumer Price Index or a market interest rate), initially measured using the index or rate at the commencement date. The Company does not Other variable lease payments: Variable payments that depends on performance or use of the underlying asset are not 3. The Company as a lessor At lease commencement, the Company as a lessor classifies leases as either finance or operating leases. Finance leases are further classified as a sales-type lease or as a direct financing lease. Under an operating lease, the Company recognizes the lease payment as income over the lease term, generally on a straight-line basis. 4. Impact of the new standard a) Effects of the initial application of the new standard on the Company's consolidated balance sheet as of January 1, 2019: According to the previous accounting policy The change As presented according to Topic 842 (Dollars in thousands) As of January 1, 2019: Prepaid expenses and other $ 51,441 $ (35,385 ) $ 16,056 Deferred financing and lease costs, net 3,242 (1,659 ) 1,583 Property, plant and equipment, net 1,959,578 (12,855 ) 1,946,723 Operating leases right of use - 62,244 62,244 Finance leases right of use - 13,476 13,476 Accounts payable and accrued expenses 116,362 (2,860 ) 113,502 Current maturity of operating lease liabilities - 7,532 7,532 Current maturity of finance lease liabilities - 2,841 2,841 Other long-term liabilities 16,087 (9,970 ) 6,117 Long term portion of operating lease liabilities - 17,668 17,668 Long term portion of finance lease liabilities - 10,668 10,668 Retained earnings 422,222 (58 ) 422,164 The Operating leases right of use is higher than the related lease liabilities as a result of prepayments of leases, including the Puna lease and deferred financing lease costs. b) A weighted-average nominal incremental interest rate of 5% 7% Derivatives and Hedging In August 2017, 2017 12, December 15, 2018, not Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income In February 2018, 2018 02, 220 2017 December 15, 2018, not New accounting pronouncements effective in future periods Financial Instruments—Credit Losses In June 2016, 2016 13 January 1, 2020,

Note 3 - Inventories

Note 3 - Inventories	3 Months Ended
	Mar. 31, 2019
Notes to Financial Statements
Inventory Disclosure [Text Block]	NOTE 3 Inventories consist of the following: March 31, December 31, 2019 2018 (Dollars in thousands) Raw materials and purchased parts for assembly $ 28,749 $ 26,914 Self-manufactured assembly parts and finished products 14,233 18,110 Total $ 42,982 $ 45,024

Note 4 - Leases

Note 4 - Leases	3 Months Ended
	Mar. 31, 2019
Notes to Financial Statements
Leases of Lessee and Lessor Disclosure [Text Block]	NOTE 4 LEASES A. Leases in which the Company is a lessee The table below presents the effects on the amounts relating to the Company’s total lease cost: Three months ended March 31, 2019 (Dollars in thousands) Lease cost Finance lease cost: Amortization of right-of-use assets $ 787 Interest on lease liabilities 306 Operating lease cost 2,134 Variable lease cost 278 Total lease cost $ 3,505 Other information Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from finance leases $ - Operating cash flows from operating leases 1,012 Financing cash flows from finance leases 767 Right-of-use assets obtained in exchange for new finance lease liabilities 2,154 Right-of-use assets obtained in exchange for new operating lease liabilities - Weighted-average remaining lease term — finance leases 4.0 Weighted-average remaining lease term — operating leases 5.7 Future minimum lease payments under non-cancellable leases as of March 31, 2019 Operating Leases Finance Leases (Dollars in thousands) Year ending December 31, 2019 (excluding the three months ended March 31, 2019) $ 7,513 $ 3,400 2020 4,109 3,715 2021 3,400 2,720 2022 2,419 2,421 2023 1,590 1,834 Thereafter 12,061 2,692 Total future minimum lease payments 31,092 16,782 Less imputed interest 5,893 1,681 Total $ 25,199 $ 15,101 Future minimum lease payments under non-cancellable leases as of December 31, 2018, 840, (Dollars in thousands) Year ending December 31, 2019 $ 10,889 2020 7,515 2021 5,758 2022 4,415 2023 2,910 Thereafter 9,292 Total $ 40,779 B. Leases in which the Company is a lessor The table below presents the revenues accounted under ASC 842, Three months ended March 31, 2019 (Dollars in thousands) Revenues accounted under ASC 842, Leases 125,908 Lease income relating to variable lease payments not included in the measurement of the lease - Total 125,908

Note 5 - Fair Value of Financia

Note 5 - Fair Value of Financial Instruments	3 Months Ended
	Mar. 31, 2019
Notes to Financial Statements
Fair Value Disclosures [Text Block]	NOTE 5— The fair value measurement guidance clarifies that fair value is an exit price, representing the amount that would be received upon selling an asset or paid upon transferring a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or liability. The guidance establishes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 3 three Level 1 Level 2 not Level 3 no The following table sets forth certain fair value information at March 31, 2019 December 31, 2018 March 31, 2019 Fair Value Carrying Value at March 31, 2019 Total Level 1 Level 2 Level 3 (Dollars in thousands) Assets: Current assets: Cash equivalents (including restricted cash accounts) $ 21,552 $ 21,552 $ 21,552 $ — $ — Derivatives: Contingent receivable (1) 101 101 — — 101 Currency forward contracts (2) 169 169 — 169 — Liabilities: Current liabilities: Derivatives: Contingent payable (1) (3,351 ) (3,351 ) — — (3,351 ) $ 18,471 $ 18,471 $ 21,552 $ 169 $ (3,250 ) December 31, 2018 Fair Value Carrying Value at December 31, 2018 Total Level 1 Level 2 Level 3 (Dollars in thousands) Assets Current assets: Cash equivalents (including restricted cash accounts) $ 18,787 $ 18,787 $ 18,787 $ — $ — Derivatives: Contingent receivable (1) 104 104 — — 104 Liabilities: Current liabilities: Derivatives: Contingent payable (1) (3,424 ) (3,424 ) — — (3,424 ) Currency forward contracts (2) (1,040 ) (1,040 ) — (1,040 ) — $ 14,427 $ 14,427 $ 18,787 $ (1,040 ) $ (3,320 ) ( 1 These amounts relate to contingent receivables and payables relating to acquisition of the Guadeloupe power plant, valued primarily based on unobservable inputs and are included within “Prepaid expenses and other”, “Accounts payable and accrued expenses” and “Other long-term liabilities” on March 31, 2019 December 31, 2018 ( 2 These amounts relate to currency forward contracts valued primarily based on observable inputs, including forward and spot prices for currencies, net of contracted rates and then multiplied by notional amounts, and are included within “Prepaid expenses and other” and “Accounts payable and accrued expenses”, as applicable, on March 31, 2019 December 31, 2018, The amounts set forth in the tables above include investments in debt instruments and money market funds (which are included in cash equivalents). Those securities and deposits are classified within Level 1 The following table presents the amounts of gain (loss) recognized in the consolidated statements of operations and comprehensive income on derivative instruments not Amount of recognized gain (loss) Derivatives not designated as hedging instruments Location of recognized gain (loss) Three Months Ended March 31, 2019 2018 Currency forward contracts Derivative and foreign currency and transaction gains (losses) $ 1,083 $ (546 ) $ 1,083 $ (546 ) The foregoing forward transactions were not There were no 1, 2 3 three March 31, 2019. The fair value of the Company’s long-term debt approximates its carrying amount, except for the following: Fair Value Carrying Amount March 31, 2019 December 31, 2018 March 31, 2019 December 31, 2018 (Dollars in millions) (Dollars in millions) Olkaria III Loan - OPIC 210.0 211.8 206.1 210.6 Olkaria IV Loan - DEG 2 48.6 47.2 47.5 47.5 Olkaria IV Loan - DEG 3 42.5 — 41.5 — Platanares Loan - OPIC 118.5 119.1 110.6 112.7 Amatitlan Loan 29.0 29.9 28.9 29.8 Senior Secured Notes: OrCal Geothermal Inc. ("OrCal") 19.2 19.0 18.7 18.7 OFC 2 LLC ("OFC 2") 213.4 214.5 213.2 217.8 Don A. Campbell 1 ("DAC 1") 78.6 78.8 81.7 83.3 USG Prudential - NV 29.9 29.4 27.8 27.8 USG Prudential - ID 18.0 18.6 18.4 18.9 USG DOE 47.3 48.3 49.8 51.4 Senior Unsecured Bonds 199.3 199.4 204.3 204.3 Senior Unsecured Loan 153.6 102.2 150.0 100.0 Other long-term debt 5.3 5.4 6.2 6.2 The fair value of the long-term debt is determined by a valuation model, which is based on a conventional discounted cash flow methodology and utilizes assumptions of current borrowing rates. The fair value of revolving lines of credit is determined using a comparison of market-based price sources that are reflective of similar credit ratings to those of the Company. The carrying value of financial instruments such as revolving lines of credit and deposits approximates fair value. The following table presents the fair value of financial instruments as of March 31, 2019: Level 1 Level 2 Level 3 Total (Dollars in millions) Olkaria III - OPIC — — 210.0 210.0 Olkaria IV - DEG 2 — — 48.6 48.6 Olkaria IV Loan - DEG 3 — — 42.5 42.5 Platanares Loan - OPIC — — 118.5 118.5 Amatitlan Loan — 29.0 — 29.0 Senior Secured Notes: OrCal Senior Secured Notes — — 19.2 19.2 OFC 2 Senior Secured Notes — — 213.4 213.4 DAC 1 Senior Secured Notes — — 78.6 78.6 USG Prudential - NV — — 29.9 29.9 USG Prudential - ID — — 18.0 18.0 USG DOE — — 47.3 47.3 Senior Unsecured Bonds — — 199.3 199.3 Senior Unsecured Loan — — 153.6 153.6 Other long-term debt — — 5.3 5.3 Revolving lines of credit — 60.9 — 60.9 Deposits 11.9 — — 11.9 The following table presents the fair value of financial instruments as of December 31, 2018: Level 1 Level 2 Level 3 Total (Dollars in millions) Olkaria III Loan - OPIC — — 211.8 211.8 Olkaria IV - DEG 2 — — 47.2 47.2 Platanares Loan - OPIC — — 119.1 119.1 Amatitlan Loan — 29.9 — 29.9 Senior Secured Notes: OrCal Senior Secured Notes — — 19.0 19.0 OFC 2 Senior Secured Notes — — 214.5 214.5 DAC 1 Senior Secured Notes — — 78.8 78.8 USG Prudential - NV — — 29.4 29.4 USG Prudential - ID — — 18.6 18.6 USG DOE — — 48.3 48.3 Senior Unsecured Bonds — — 199.4 199.4 Senior Unsecured Loan — — 102.2 102.2 Other long-term debt — — 5.4 5.4 Revolving lines of credit — 159.0 — 159.0 Deposits 12.0 — — 12.0

Note 6 - Stock-based Compensati

Note 6 - Stock-based Compensation	3 Months Ended
	Mar. 31, 2019
Notes to Financial Statements
Share-based Payment Arrangement [Text Block]	NOTE 6 No 2018 first 2019.

Note 7 - Interest Expense, Net

Note 7 - Interest Expense, Net	3 Months Ended
	Mar. 31, 2019
Notes to Financial Statements
Interest Expense Disclosure [Text Block]	NOTE 7 — INTEREST EXPENSE, NET The components of interest expense are as follows: Three Months Ended March 31, 2019 2018 (Dollars in thousands) Interest related to sale of tax benefits $ 3,661 $ 1,409 Interest expense 17,562 13,306 Less — amount capitalized — (371 ) $ 21,223 $ 14,344

Note 8 - Earnings Per Share

Note 8 - Earnings Per Share	3 Months Ended
	Mar. 31, 2019
Notes to Financial Statements
Earnings Per Share [Text Block]	NOTE 8 Basic earnings per share attributable to the Company’s stockholders is computed by dividing net income or loss attributable to the Company’s stockholders by the weighted average number of shares of common stock outstanding for the period. The Company does not The table below shows the reconciliation of the number of shares used in the computation of basic and diluted earnings per share (in thousands): Three Months Ended March 31, 2019 2018 Weighted average number of shares used in computation of basic earnings per share 50,709 50,614 Add: Additional shares from the assumed exercise of employee stock options 303 437 Weighted average number of shares used in computation of diluted earnings per share 51,012 51,051 The number of stock-based awards that could potentially dilute future earnings per share and that were not 249,908 62,409 three March 31, 2019 2018,

Note 9 - Business Segments

Note 9 - Business Segments	3 Months Ended
	Mar. 31, 2019
Notes to Financial Statements
Segment Reporting Disclosure [Text Block]	NOTE 9 The Company has three Transfer prices between the operating segments are determined based on current market values or cost-plus markup of the seller’s business segment. Summarized financial information concerning the Company’s reportable segments is shown in the following tables: Electricity Product Other Consolidated (Dollars in thousands) Three Months Ended March 31, 2019: Revenues from external customers: United States (1) $ 91,528 $ 11,243 $ 4,002 $ 106,773 Foreign (2) 51,380 40,885 — 92,265 Net revenues from external customers 142,908 52,128 4,002 199,038 Intersegment revenues — 18,261 — 18,261 Operating income (loss) 51,551 4,252 (2,078 ) 53,725 Segment assets at period end (3) (*) 2,950,444 125,248 67,522 3,143,214 * Including unconsolidated investments 71,885 — — 71,885 Three Months Ended March 31, 2018: Revenues from external customers: United States (1) $ 83,683 $ 194 $ 2,862 $ 86,739 Foreign (2) 48,806 48,478 — 97,284 Net revenues from external customers 132,489 48,672 2,862 184,023 Intersegment revenues — 24,827 — 24,827 Operating income 46,412 9,553 (1,372 ) 54,593 Segment assets at period end (3) (*) 2,542,154 114,815 53,848 2,710,817 * Including unconsolidated investments 63,109 — — 63,109 ( 1 Electricity segment revenues in the United States are all accounted under ASC 842, $17.0 three March 31, 2019 606. three March 31, 2018, 840, $6.7 606. ( 2 ) For the three March 31, 2019, 842, 606. three March 31, 2018, 840, 606. ( 3 ) Electricity segment assets include goodwill in the amount of $20.1 $7.8 March 31, 2019 2018, $13.5 March 31, 2018. No March 31, 2019. Reconciling information between reportable segments and the Company’s consolidated totals is shown in the following table: Three Months Ended March 31, 2019 2018 (Dollars in thousands) Revenue: Total segment revenue $ 199,038 $ 184,023 Intersegment revenue 18,261 24,827 Elimination of intersegment revenue (18,261 ) (24,827 ) Total consolidated revenue $ 199,038 $ 184,023 Operating income: Operating income $ 53,725 $ 54,593 Interest income 293 113 Interest expense, net (21,223 ) (14,344 ) Derivatives and foreign currency transaction gains (losses) 472 (1,599 ) Income attributable to sale of tax benefits 7,764 7,361 Other non-operating income (expense), net 91 (20 ) Total consolidated income from operations before income taxes and equity in earnings of investees $ 41,122 $ 46,104

Note 10 - Commitments and Conti

Note 10 - Commitments and Contingencies	3 Months Ended
	Mar. 31, 2019
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	NOTE 10 ● On May 21, 2018, 11 August 3, 2017 May 13, 2018". 31 1 38C 1 2017 2 May 16, 2018, May 11, 2018 2017 ● On June 11, 2018, August 8, 2017 May 15, 2018 10 10b 5 20 10 December 31, 2016 2017, 10 nine September 30, 2017 1995 March 12, 2019 May 13, 2019, July 12, 2019, August 26, 2019, September 25, 2019. ● On September 11, 2018, October 22, 2018, four 14 2018 January 24, 2019, thirty ● Following the announcement of the Company’s acquisition of U.S. Geothermal Inc. (“USG”), a number of putative shareholder class action complaints were initially filed on behalf of USG shareholders between March 8, 2018 March 30, 2018 No. 2018 0177 Mar. 12, 2018). May 24, 2018 ● On August 5, 2016, April 4, 2019, ● On March 29, 2016, 27th $4.6 3.75% 10 11th In addition, from time to time, the Company is named as a party to various other lawsuits, claims and other legal and regulatory proceedings that arise in the ordinary course of our business. These actions typically seek, among other things, compensation for alleged personal injury, breach of contract, property damage, punitive damages, civil penalties or other losses, or injunctive or declaratory relief. With respect to such lawsuits, claims and proceedings, the Company accrues reserves when a loss is probable, and the amount of such loss can be reasonably estimated. It is the opinion of the Company’s management that the outcome of these proceedings, individually and collectively, will not

Note 11 - Income Taxes

Note 11 - Income Taxes	3 Months Ended
	Mar. 31, 2019
Notes to Financial Statements
Income Tax Disclosure [Text Block]	NOTE 11 The Company’s effective tax rate expense (benefit) for the three March 31, 2019 2018 34.1% 58.4 21% three March 31, 2019 163 The Company is required by the Tax Act to include in U.S. taxable income amounts on related to GILTI. The Company elected as an accounting policy in 2018 As a result of the Tax Act, the Company is also subject to certain statutory restrictions on its interest deductions under IRC section 163 30% not $8.8

Note 12 - Subsequent Events

Note 12 - Subsequent Events	3 Months Ended
	Mar. 31, 2019
Notes to Financial Statements
Subsequent Events [Text Block]	NOTE 12 Cash dividend On May 6, 2019 $5.6 $0.11 May 20, 2019 May 28, 2019

Significant Accounting Policies

Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2019
Accounting Policies [Abstract]
Debt, Policy [Policy Text Block]	Puna May 3, 2018, 38 three first 2019, $1.5 May 2018 first 2019, $1.3 three March 31, 2019. May 2018. April 2019 $4.1 The Company is still assessing the damages in the Puna facilities and continue to coordinate with Hawaii Electric Light Company (“HELCO”) and local authorities to bring the power plant back to operation. The Company continues to assess the accounting implications of this event on the assets and liabilities on its balance sheet and whether an impairment will be required. Any significant damage to the geothermal resource or continued shut-down following the lava event at the Puna facilities could have an adverse impact on the power plant's electricity generation and availability, which in turn could have a material adverse impact on our business and results of operations. DEG 3 On January 4, 2019, 4” $41.5 3 February 28, 2019, 4 6.04% 3 3 19 June 21, 2019, June 21, 2028. 3 4 1 3 1 3 3 Migdal Senior Unsecured Loan On March 25, 2019, first March 22, 2018. $50.0 15 $2.1 September 15, 2021, $18.5 March 15, 2029. 4.6% The Additional Migdal Loan was entered into under substantially the same terms and conditions of the Migdal Loan Agreement as disclosed in the Company’s Form 10 December 31, 2018.
Exploratory Drilling Costs Capitalization and Impairment, Policy [Policy Text Block]	Write-offs of unsuccessful exploration activities There were no three March 31, 2019. three March 31, 2018 $0.1
Cash and Cash Equivalents, Policy [Policy Text Block]	Reconciliation of Cash and cash equivalents and Restricted cash and cash equivalents The following table provides a reconciliation of Cash and cash equivalents and Restricted cash and cash equivalents reported on the balance sheet that sum to the total of the same amounts shown on the statement of cash flows: March 31, December 31, March 31, 2019 2018 2018 (Dollars in thousands) Cash and cash equivalents $ 79,366 $ 98,802 $ 54,723 Restricted cash and cash equivalents 93,098 78,693 $ 50,332 Total Cash and cash equivalents and restricted cash and cash equivalents $ 172,464 $ 177,495 $ 105,055
Concentration Risk, Credit Risk, Policy [Policy Text Block]	Concentration of credit risk Financial instruments that potentially subject the Company to a concentration of credit risk consist principally of temporary cash investments and accounts receivable. The Company places its temporary cash investments with high credit quality financial institutions located in the United States (“U.S.”) and in foreign countries. At March 31, 2019 December 31, 2018, $28.6 $31.3 ten $250,000 March 31, 2019 December 31, 2018, $75.9 $93.9 At March 31, 2019 December 31, 2018, $106.8 $102.0 March 31, 2019 December 31, 2018, 55% 56% Sierra Pacific Power Company and Nevada Power Company (subsidiaries of NV Energy, Inc.) accounted for 18.2% 17.4% three March 31, 2019 2018, Southern California Public Power Authority (“SCPPA”) accounted for 19.4% 16.3% three March 31, 2019 2018, Kenya Power and Lighting Co. Ltd. accounted for 15.3% 15.1% three March 31, 2019 2018, We have historically been able to collect on substantially all of our receivable balances. Recently, we have been receiving late payments from KPLC in Kenya related to our Olkaria Complex and from ENNE in Honduras related to our Platanares power plant. As of March 31, 2019, $29.4 $18.0 $ 20.4 $3.0 April 2019. no Additionally, Pacific Gas and Electric Corporation (“PG&E Corporation”) and its subsidiary Pacific Gas and Electric Company (“PG&E”), which accounts for 1.2% three March 31, 2019, 2017 2018. January 29, 2019, 11 January 2019 not 11 February March
Revenue [Policy Text Block]	Revenues from Contracts with Customers Contract assets related to our Product segment reflect revenue recognized and performance obligations satisfied in advance of customer billing. Contract liabilities related to our Product segment reflect payments received in advance of the satisfaction of performance under the contract. We receive payments from customers based on the terms established in our contracts. Total contract assets and contract liabilities as of March 31, 2019 December 31, 2018 March 31, December 31, 2019 2018 (Dollars in thousands) Contract assets (*) $ 29,762 $ 42,130 Contract liabilities (*) (15,508 ) (18,402 ) Contract assets, net $ 14,254 $ 23,728 (*) Contract assets and contract liabilities are presented as "Costs and estimated earnings in excess of billings on uncompleted contracts" and "Billings in excess of costs and estimated earnings on uncompleted contracts", respectively, on the consolidated balance sheets. On March 31, 2019, $226.1 not 100% 24

Note 1 - General and Basis of_2

Note 1 - General and Basis of Presentation (Tables)	3 Months Ended
	Mar. 31, 2019
Notes Tables
Schedule of Cash and Cash Equivalents [Table Text Block]	March 31, December 31, March 31, 2019 2018 2018 (Dollars in thousands) Cash and cash equivalents $ 79,366 $ 98,802 $ 54,723 Restricted cash and cash equivalents 93,098 78,693 $ 50,332 Total Cash and cash equivalents and restricted cash and cash equivalents $ 172,464 $ 177,495 $ 105,055
Contract with Customer, Asset and Liability [Table Text Block]	March 31, December 31, 2019 2018 (Dollars in thousands) Contract assets (*) $ 29,762 $ 42,130 Contract liabilities (*) (15,508 ) (18,402 ) Contract assets, net $ 14,254 $ 23,728

Note 2 - New Accounting Prono_2

Note 2 - New Accounting Pronouncements (Tables)	3 Months Ended
	Mar. 31, 2019
Notes Tables
Schedule Of Estimated Useful Lives [Table Text Block]	(in years) Land 1 - 35 Automobiles 5 Building 15
Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]	According to the previous accounting policy The change As presented according to Topic 842 (Dollars in thousands) As of January 1, 2019: Prepaid expenses and other $ 51,441 $ (35,385 ) $ 16,056 Deferred financing and lease costs, net 3,242 (1,659 ) 1,583 Property, plant and equipment, net 1,959,578 (12,855 ) 1,946,723 Operating leases right of use - 62,244 62,244 Finance leases right of use - 13,476 13,476 Accounts payable and accrued expenses 116,362 (2,860 ) 113,502 Current maturity of operating lease liabilities - 7,532 7,532 Current maturity of finance lease liabilities - 2,841 2,841 Other long-term liabilities 16,087 (9,970 ) 6,117 Long term portion of operating lease liabilities - 17,668 17,668 Long term portion of finance lease liabilities - 10,668 10,668 Retained earnings 422,222 (58 ) 422,164

Note 3 - Inventories (Tables)

Note 3 - Inventories (Tables)	3 Months Ended
	Mar. 31, 2019
Notes Tables
Schedule of Inventory, Current [Table Text Block]	March 31, December 31, 2019 2018 (Dollars in thousands) Raw materials and purchased parts for assembly $ 28,749 $ 26,914 Self-manufactured assembly parts and finished products 14,233 18,110 Total $ 42,982 $ 45,024

Note 4 - Leases (Tables)

Note 4 - Leases (Tables)	3 Months Ended
	Mar. 31, 2019
Notes Tables
Lease, Cost [Table Text Block]	Three months ended March 31, 2019 (Dollars in thousands) Lease cost Finance lease cost: Amortization of right-of-use assets $ 787 Interest on lease liabilities 306 Operating lease cost 2,134 Variable lease cost 278 Total lease cost $ 3,505 Other information Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from finance leases $ - Operating cash flows from operating leases 1,012 Financing cash flows from finance leases 767 Right-of-use assets obtained in exchange for new finance lease liabilities 2,154 Right-of-use assets obtained in exchange for new operating lease liabilities - Weighted-average remaining lease term — finance leases 4.0 Weighted-average remaining lease term — operating leases 5.7
Lessee, Lease Liability, Maturity [Table Text Block]	Operating Leases Finance Leases (Dollars in thousands) Year ending December 31, 2019 (excluding the three months ended March 31, 2019) $ 7,513 $ 3,400 2020 4,109 3,715 2021 3,400 2,720 2022 2,419 2,421 2023 1,590 1,834 Thereafter 12,061 2,692 Total future minimum lease payments 31,092 16,782 Less imputed interest 5,893 1,681 Total $ 25,199 $ 15,101
Schedule of Future Minimum Rental Payments for Operating and Capital Leases [Table Text Block]	(Dollars in thousands) Year ending December 31, 2019 $ 10,889 2020 7,515 2021 5,758 2022 4,415 2023 2,910 Thereafter 9,292 Total $ 40,779
Operating Lease, Lease Income [Table Text Block]	Three months ended March 31, 2019 (Dollars in thousands) Revenues accounted under ASC 842, Leases 125,908 Lease income relating to variable lease payments not included in the measurement of the lease - Total 125,908

Note 5 - Fair Value of Financ_2

Note 5 - Fair Value of Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2019
Notes Tables
Fair Value, by Balance Sheet Grouping [Table Text Block]	March 31, 2019 Fair Value Carrying Value at March 31, 2019 Total Level 1 Level 2 Level 3 (Dollars in thousands) Assets: Current assets: Cash equivalents (including restricted cash accounts) $ 21,552 $ 21,552 $ 21,552 $ — $ — Derivatives: Contingent receivable (1) 101 101 — — 101 Currency forward contracts (2) 169 169 — 169 — Liabilities: Current liabilities: Derivatives: Contingent payable (1) (3,351 ) (3,351 ) — — (3,351 ) $ 18,471 $ 18,471 $ 21,552 $ 169 $ (3,250 ) December 31, 2018 Fair Value Carrying Value at December 31, 2018 Total Level 1 Level 2 Level 3 (Dollars in thousands) Assets Current assets: Cash equivalents (including restricted cash accounts) $ 18,787 $ 18,787 $ 18,787 $ — $ — Derivatives: Contingent receivable (1) 104 104 — — 104 Liabilities: Current liabilities: Derivatives: Contingent payable (1) (3,424 ) (3,424 ) — — (3,424 ) Currency forward contracts (2) (1,040 ) (1,040 ) — (1,040 ) — $ 14,427 $ 14,427 $ 18,787 $ (1,040 ) $ (3,320 )
Derivative Instruments, Gain (Loss) [Table Text Block]	Amount of recognized gain (loss) Derivatives not designated as hedging instruments Location of recognized gain (loss) Three Months Ended March 31, 2019 2018 Currency forward contracts Derivative and foreign currency and transaction gains (losses) $ 1,083 $ (546 ) $ 1,083 $ (546 )
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block]	Fair Value Carrying Amount March 31, 2019 December 31, 2018 March 31, 2019 December 31, 2018 (Dollars in millions) (Dollars in millions) Olkaria III Loan - OPIC 210.0 211.8 206.1 210.6 Olkaria IV Loan - DEG 2 48.6 47.2 47.5 47.5 Olkaria IV Loan - DEG 3 42.5 — 41.5 — Platanares Loan - OPIC 118.5 119.1 110.6 112.7 Amatitlan Loan 29.0 29.9 28.9 29.8 Senior Secured Notes: OrCal Geothermal Inc. ("OrCal") 19.2 19.0 18.7 18.7 OFC 2 LLC ("OFC 2") 213.4 214.5 213.2 217.8 Don A. Campbell 1 ("DAC 1") 78.6 78.8 81.7 83.3 USG Prudential - NV 29.9 29.4 27.8 27.8 USG Prudential - ID 18.0 18.6 18.4 18.9 USG DOE 47.3 48.3 49.8 51.4 Senior Unsecured Bonds 199.3 199.4 204.3 204.3 Senior Unsecured Loan 153.6 102.2 150.0 100.0 Other long-term debt 5.3 5.4 6.2 6.2
Fair Value, Liabilities Measured on Recurring and Nonrecurring Basis [Table Text Block]	Level 1 Level 2 Level 3 Total (Dollars in millions) Olkaria III - OPIC — — 210.0 210.0 Olkaria IV - DEG 2 — — 48.6 48.6 Olkaria IV Loan - DEG 3 — — 42.5 42.5 Platanares Loan - OPIC — — 118.5 118.5 Amatitlan Loan — 29.0 — 29.0 Senior Secured Notes: OrCal Senior Secured Notes — — 19.2 19.2 OFC 2 Senior Secured Notes — — 213.4 213.4 DAC 1 Senior Secured Notes — — 78.6 78.6 USG Prudential - NV — — 29.9 29.9 USG Prudential - ID — — 18.0 18.0 USG DOE — — 47.3 47.3 Senior Unsecured Bonds — — 199.3 199.3 Senior Unsecured Loan — — 153.6 153.6 Other long-term debt — — 5.3 5.3 Revolving lines of credit — 60.9 — 60.9 Deposits 11.9 — — 11.9 Level 1 Level 2 Level 3 Total (Dollars in millions) Olkaria III Loan - OPIC — — 211.8 211.8 Olkaria IV - DEG 2 — — 47.2 47.2 Platanares Loan - OPIC — — 119.1 119.1 Amatitlan Loan — 29.9 — 29.9 Senior Secured Notes: OrCal Senior Secured Notes — — 19.0 19.0 OFC 2 Senior Secured Notes — — 214.5 214.5 DAC 1 Senior Secured Notes — — 78.8 78.8 USG Prudential - NV — — 29.4 29.4 USG Prudential - ID — — 18.6 18.6 USG DOE — — 48.3 48.3 Senior Unsecured Bonds — — 199.4 199.4 Senior Unsecured Loan — — 102.2 102.2 Other long-term debt — — 5.4 5.4 Revolving lines of credit — 159.0 — 159.0 Deposits 12.0 — — 12.0

Note 7 - Interest Expense, Net

Note 7 - Interest Expense, Net (Tables)	3 Months Ended
	Mar. 31, 2019
Notes Tables
Schedule of Other Nonoperating Expense, by Component [Table Text Block]	Three Months Ended March 31, 2019 2018 (Dollars in thousands) Interest related to sale of tax benefits $ 3,661 $ 1,409 Interest expense 17,562 13,306 Less — amount capitalized — (371 ) $ 21,223 $ 14,344

Note 8 - Earnings Per Share (Ta

Note 8 - Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2019
Notes Tables
Schedule of Weighted Average Number of Shares [Table Text Block]	Three Months Ended March 31, 2019 2018 Weighted average number of shares used in computation of basic earnings per share 50,709 50,614 Add: Additional shares from the assumed exercise of employee stock options 303 437 Weighted average number of shares used in computation of diluted earnings per share 51,012 51,051

Note 9 - Business Segments (Tab

Note 9 - Business Segments (Tables)	3 Months Ended
	Mar. 31, 2019
Notes Tables
Schedule of Segment Reporting Information, by Segment [Table Text Block]	Electricity Product Other Consolidated (Dollars in thousands) Three Months Ended March 31, 2019: Revenues from external customers: United States (1) $ 91,528 $ 11,243 $ 4,002 $ 106,773 Foreign (2) 51,380 40,885 — 92,265 Net revenues from external customers 142,908 52,128 4,002 199,038 Intersegment revenues — 18,261 — 18,261 Operating income (loss) 51,551 4,252 (2,078 ) 53,725 Segment assets at period end (3) (*) 2,950,444 125,248 67,522 3,143,214 * Including unconsolidated investments 71,885 — — 71,885 Three Months Ended March 31, 2018: Revenues from external customers: United States (1) $ 83,683 $ 194 $ 2,862 $ 86,739 Foreign (2) 48,806 48,478 — 97,284 Net revenues from external customers 132,489 48,672 2,862 184,023 Intersegment revenues — 24,827 — 24,827 Operating income 46,412 9,553 (1,372 ) 54,593 Segment assets at period end (3) (*) 2,542,154 114,815 53,848 2,710,817 * Including unconsolidated investments 63,109 — — 63,109
Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block]	Three Months Ended March 31, 2019 2018 (Dollars in thousands) Revenue: Total segment revenue $ 199,038 $ 184,023 Intersegment revenue 18,261 24,827 Elimination of intersegment revenue (18,261 ) (24,827 ) Total consolidated revenue $ 199,038 $ 184,023 Operating income: Operating income $ 53,725 $ 54,593 Interest income 293 113 Interest expense, net (21,223 ) (14,344 ) Derivatives and foreign currency transaction gains (losses) 472 (1,599 ) Income attributable to sale of tax benefits 7,764 7,361 Other non-operating income (expense), net 91 (20 ) Total consolidated income from operations before income taxes and equity in earnings of investees $ 41,122 $ 46,104

Note 1 - General and Basis of_3

Note 1 - General and Basis of Presentation 1 (Details Textual) - USD ($) $ in Thousands	Mar. 25, 2019	Apr. 30, 2019	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018	Jan. 04, 2019
Exploration Abandonment and Impairment Expense			$ 0	$ 123
Accounts Receivable, after Allowance for Credit Loss, Current, Total			139,870		$ 137,581
Product [Member]
Revenue, Remaining Performance Obligation, Amount			226,100
Kenya Power and Lighting Co LTD [Member]
Accounts Receivable, Past Due			29,400
ENNE [Member]
Accounts Receivable, Past Due			$ 18,000
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Primary Customers [Member]
Concentration Risk, Percentage			55.00%		56.00%
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Sierra Pacific Power Company And Nevada Power Company [Member]
Concentration Risk, Percentage			18.20%	17.40%
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Southern California Public Power Authority [Member]
Concentration Risk, Percentage			19.40%	16.30%
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Kenya Power and Lighting Co LTD [Member]
Concentration Risk, Percentage			15.30%	15.10%
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Pacific Gas & Electric [Member]
Concentration Risk, Percentage			1.20%
UNITED STATES
Cash, Cash Equivalents, and Short-term Investments, Total			$ 28,600		$ 31,300
Foreign Countries [Member]
Cash, Cash Equivalents, and Short-term Investments, Total			75,900		93,900
Accounts Receivable, after Allowance for Credit Loss, Current, Total			106,800		$ 102,000
DEG 3 Loan Agreement [Member]
Debt Instrument, Interest Rate, Stated Percentage						6.04%
DEG 3 Loan Agreement [Member] | OrPower 4, Inc [Member]
Debt Instrument, Face Amount						$ 41,500
Additional Migdal Loan [Member]
Debt Instrument, Face Amount	$ 50,000
Debt Instrument, Interest Rate, Stated Percentage	4.60%
Debt Instrument, Periodic Payment, Total	$ 2,100
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid	$ 18,500
Subsequent Event [Member] | Kenya Power and Lighting Co LTD [Member]
Proceeds, Overdue Accounts Receivable		$ 20,400
Subsequent Event [Member] | ENNE [Member]
Proceeds, Overdue Accounts Receivable		3,000
Electricity Segment [Member] | Puna Geothermal Power Plant [Member]
Proceeds from Insurance Settlement, Operating Activities			1,500
Electricity Segment [Member] | Puna Geothermal Power Plant [Member] | Subsequent Event [Member]
Proceeds from Insurance Settlement, Operating Activities		$ 4,100
Electricity Segment [Member] | Puna Geothermal Power Plant [Member] | Cost of Sales [Member]
Proceeds from Insurance Settlement, Operating Activities			$ 1,300

Note 1 - General and Basis of_4

Note 1 - General and Basis of Presentation 2 (Details Textual) - Product [Member] - Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-03-31	Mar. 31, 2019
Revenue, Remaining Performance Obligation, Percentage	100.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	2 years

Note 1 - General and Basis of_5

Note 1 - General and Basis of Presentation - Cash and Restricted Cash and Cash Equivalents (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Cash and cash equivalents	$ 79,366	$ 98,802	$ 54,723
Restricted cash and cash equivalents	93,098	78,693	50,332
Total Cash and cash equivalents and restricted cash and cash equivalents	$ 172,464	$ 177,495	$ 105,055	$ 96,643

Note 1 - General and Basis of_6

Note 1 - General and Basis of Presentation - Contract Assets (Liabilities) (Details) - USD ($) $ in Thousands		Mar. 31, 2019	Dec. 31, 2018
Contract assets (*)	[1]	$ 29,762	$ 42,130
Contract liabilities (*)	[1]	(15,508)	(18,402)
Contract assets, net		$ 14,254	$ 23,728
[1]	Contract assets and contract liabilities are presented as "Costs and estimated earnings in excess of billings on uncompleted contracts" and "Billings in excess of costs and estimated earnings on uncompleted contracts", respectively, on the consolidated balance sheet.

Note 2 - New Accounting Prono_3

Note 2 - New Accounting Pronouncements (Details Textual)	Mar. 31, 2019
Operating Lease, Weighted Average Discount Rate, Percent	5.00%
Finance Lease, Weighted Average Discount Rate, Percent	7.00%

Note 2 - New Accounting Prono_4

Note 2 - New Accounting Pronouncements - ROU Assets Useful Life (Details)	3 Months Ended
	Mar. 31, 2019
Automobiles [Member]
Property, plant, and equipment estimated useful lives (Year)	5 years
Building [Member]
Property, plant, and equipment estimated useful lives (Year)	15 years
Minimum [Member] | Land [Member]
Property, plant, and equipment estimated useful lives (Year)	1 year
Maximum [Member] | Land [Member]
Property, plant, and equipment estimated useful lives (Year)	35 years

Note 2 - New Accounting Prono_5

Note 2 - New Accounting Pronouncements - Effect of the Initial Application of New Standard in the Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Prepaid expenses and other	$ 18,224	$ 16,056	$ 51,441
Deferred financing and lease costs, net	1,733	1,583	3,242
Property, plant and equipment, net	1,962,580	1,946,723	1,959,578
Operating leases right of use	60,656	62,244
Finance leases right of use	14,433	13,476
Accounts payable and accrued expenses	108,309	113,502	116,362
Current maturity of operating lease liabilities	7,532	7,532
Finance lease liabilities	3,147	2,841
Other long-term liabilities	5,464	6,117	16,087
Long term portion of operating lease liabilities	17,667	17,668
Long term portion of finance lease liabilities	11,954	10,668
Retained earnings	$ 442,531	422,164	$ 422,222
Accounting Standards Update 2016-02 [Member]
Prepaid expenses and other		(35,385)
Deferred financing and lease costs, net		(1,659)
Property, plant and equipment, net		(12,855)
Operating leases right of use		62,244
Finance leases right of use		13,476
Accounts payable and accrued expenses		(2,860)
Current maturity of operating lease liabilities		7,532
Finance lease liabilities		2,841
Other long-term liabilities		(9,970)
Long term portion of operating lease liabilities		17,668
Long term portion of finance lease liabilities		10,668
Retained earnings		$ (58)

Note 3 - Inventories - Inventor

Note 3 - Inventories - Inventories, Current (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Raw materials and purchased parts for assembly	$ 28,749	$ 26,914
Self-manufactured assembly parts and finished products	14,233	18,110
Total	$ 42,982	$ 45,024

Note 4 - Leases - Lessee's Tota

Note 4 - Leases - Lessee's Total Lease Cost (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019USD ($)
Lease cost
Amortization of right-of-use assets	$ 787
Interest on lease liabilities	306
Operating lease cost	2,134
Variable lease cost	278
Total lease cost	3,505
Operating cash flows from finance leases
Operating cash flows from operating leases	1,012
Financing cash flows from finance leases	767
Right-of-use assets obtained in exchange for new finance lease liabilities	2,154
Right-of-use assets obtained in exchange for new operating lease liabilities
Weighted-average remaining lease term — finance leases (Year)	4 years
Weighted-average remaining lease term — operating leases (Year)	5 years 255 days

Note 4 - Leases - Lessee Future

Note 4 - Leases - Lessee Future Minimum Lease Payments (Details) $ in Thousands	Mar. 31, 2019USD ($)
2019 (excluding the three months ended March 31, 2019), operating leases	$ 7,513
2019 (excluding the three months ended March 31, 2019), finance leases	3,400
2020, operating leases	4,109
2020, finance leases	3,715
2021, operating leases	3,400
2021, finance leases	2,720
2022, operating leases	2,419
2022, finance leases	2,421
2023, operating leases	1,590
2023, finance leases	1,834
Thereafter, operating leases	12,061
Thereafter, finance leases	2,692
Total future minimum lease payments, operating leases	31,092
Total future minimum lease payments, finance leases	16,782
Less imputed interest, operating leases	5,893
Less imputed interest, finance leases	1,681
Total, operating leases	25,199
Total, finance leases	$ 15,101

Note 4 - Leases - Future Minimu

Note 4 - Leases - Future Minimum Lease Payments Under Non-cancellable Leases (Details) $ in Thousands	Dec. 31, 2018USD ($)
2019	$ 10,889
2020	7,515
2021	5,758
2022	4,415
2023	2,910
Thereafter	9,292
Total	$ 40,779

Note 4 - Leases - Lease Income

Note 4 - Leases - Lease Income Recognized (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019USD ($)
Revenues accounted under ASC 842, Leases	$ 125,908
Lease income relating to variable lease payments not included in the measurement of the lease
Total	$ 125,908

Note 5 - Fair Value of Financ_3

Note 5 - Fair Value of Financial Instruments - Financial Assets and Liabilities at Fair Value (Details) - USD ($) $ in Thousands		Mar. 31, 2019	Dec. 31, 2018
Reported Value Measurement [Member]
Cash equivalents (including restricted cash accounts)		$ 21,552
		18,471	$ 14,427
Cash equivalents (including restricted cash accounts)			18,787
Reported Value Measurement [Member] | Contingent Receivable [Member]
Derivative Asset, Current	[1]	101	104
Reported Value Measurement [Member] | Currency Forward Contracts [Member]
Derivative Asset, Current	[2]	169
Derivative Liability, Current	[2]		(1,040)
Reported Value Measurement [Member] | Contingent Payable [Member]
Derivative Liability, Current	[1]	(3,351)	(3,424)
Estimate of Fair Value Measurement [Member]
Cash equivalents (including restricted cash accounts)		21,552
		18,471	14,427
Cash equivalents (including restricted cash accounts)			18,787
Estimate of Fair Value Measurement [Member] | Contingent Receivable [Member]
Derivative Asset, Current	[1]	101	104
Estimate of Fair Value Measurement [Member] | Currency Forward Contracts [Member]
Derivative Asset, Current	[2]	169
Derivative Liability, Current	[2]		(1,040)
Estimate of Fair Value Measurement [Member] | Contingent Payable [Member]
Derivative Liability, Current	[1]	(3,351)	(3,424)
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Cash equivalents (including restricted cash accounts)		21,552
		21,552	18,787
Cash equivalents (including restricted cash accounts)			18,787
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] | Contingent Receivable [Member]
Derivative Asset, Current	[1]
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] | Currency Forward Contracts [Member]
Derivative Asset, Current	[2]
Derivative Liability, Current	[2]
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] | Contingent Payable [Member]
Derivative Liability, Current	[1]
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Cash equivalents (including restricted cash accounts)
		169	(1,040)
Cash equivalents (including restricted cash accounts)
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Contingent Receivable [Member]
Derivative Asset, Current	[1]
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Currency Forward Contracts [Member]
Derivative Asset, Current	[2]	169
Derivative Liability, Current	[2]		(1,040)
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Contingent Payable [Member]
Derivative Liability, Current	[1]
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]
Cash equivalents (including restricted cash accounts)
		(3,250)	(3,320)
Cash equivalents (including restricted cash accounts)
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] | Contingent Receivable [Member]
Derivative Asset, Current	[1]	101	104
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] | Currency Forward Contracts [Member]
Derivative Asset, Current	[2]
Derivative Liability, Current	[2]
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] | Contingent Payable [Member]
Derivative Liability, Current	[1]	$ (3,351)	$ (3,424)
[1]	These amounts relate to contingent receivables and payables relating to acquisition of the Guadeloupe power plant, valued primarily based on unobservable inputs and are included within "Prepaid expenses and other", "Accounts payable and accrued expenses" and "Other long-term liabilities" on March 31, 2019 and December 31, 2018 in the consolidated balance sheets with the corresponding gain or loss being recognized within "Derivatives and foreign currency transaction gains (losses)" in the consolidated statement of operations and comprehensive income.
[2]	These amounts relate to currency forward contracts valued primarily based on observable inputs, including forward and spot prices for currencies, net of contracted rates and then multiplied by notional amounts, and are included within "Prepaid expenses and other" and "Accounts payable and accrued expenses", as applicable, on March 31, 2019 and December 31, 2018, in the consolidated balance sheet with the corresponding gain or loss being recognized within "Derivatives and foreign currency transaction gains (losses)" in the consolidated statement of operations and comprehensive income.

Note 5 - Fair Value of Financ_4

Note 5 - Fair Value of Financial Instruments - Amounts of Gain (Loss) Recognized in Condensed Consolidated Statements on Derivative Instruments Not Designated as Hedges (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Amount of gain (loss) recognized	$ 1,083	$ (546)
Foreign Currency Gain (Loss) [Member] | Currency Forward Contracts [Member]
Amount of gain (loss) recognized	$ 1,083	$ (546)

Note 5 - Fair Value of Financ_5

Note 5 - Fair Value of Financial Instruments - Fair Value of Long-term Debt Approximates Its Carrying Amount, Exceptions (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Estimate of Fair Value Measurement [Member]
Other long-term debt	$ 5.3	$ 5.4
Reported Value Measurement [Member]
Other long-term debt	6.2	6.2
Olkaria III OPIC [Member]
Loans	210	211.8
Olkaria III OPIC [Member] | Estimate of Fair Value Measurement [Member]
Loans	210	211.8
Olkaria III OPIC [Member] | Reported Value Measurement [Member]
Loans	206.1	210.6
Olkaria IV Loan - DEG 2 [Member]
Loans	48.6
Olkaria IV Loan - DEG 2 [Member] | Estimate of Fair Value Measurement [Member]
Loans	48.6	47.2
Olkaria IV Loan - DEG 2 [Member] | Reported Value Measurement [Member]
Loans	47.5	47.5
Olkaria IV Loan - DEG 3 [Member]
Loans	42.5
Olkaria IV Loan - DEG 3 [Member] | Estimate of Fair Value Measurement [Member]
Loans	42.5
Olkaria IV Loan - DEG 3 [Member] | Reported Value Measurement [Member]
Loans	41.5
Platanares Loan - OPIC [Member]
Loans	118.5	119.1
Platanares Loan - OPIC [Member] | Estimate of Fair Value Measurement [Member]
Loans	118.5	119.1
Platanares Loan - OPIC [Member] | Reported Value Measurement [Member]
Loans	110.6	112.7
Amatitlan Loan [Member]
Loans	29	29.9
Amatitlan Loan [Member] | Estimate of Fair Value Measurement [Member]
Loans	29	29.9
Amatitlan Loan [Member] | Reported Value Measurement [Member]
Loans	28.9	29.8
OrCal Geothermal Inc [Member]
Notes	19.2	19
OrCal Geothermal Inc [Member] | Estimate of Fair Value Measurement [Member]
Notes	19.2	19
OrCal Geothermal Inc [Member] | Reported Value Measurement [Member]
Notes	18.7	18.7
OFC Two Senior Secured Notes [Member] | Estimate of Fair Value Measurement [Member]
Notes	213.4	214.5
OFC Two Senior Secured Notes [Member] | Reported Value Measurement [Member]
Notes	213.2	217.8
Don A. Campbell 1 ("DAC1") [Member]
Notes	78.6	78.8
Don A. Campbell 1 ("DAC1") [Member] | Estimate of Fair Value Measurement [Member]
Notes	78.6	78.8
Don A. Campbell 1 ("DAC1") [Member] | Reported Value Measurement [Member]
Notes	81.7	83.3
USG Prudential - NV [Member]
Notes	29.9	29.4
USG Prudential - NV [Member] | Estimate of Fair Value Measurement [Member]
Notes	29.9	29.4
USG Prudential - NV [Member] | Reported Value Measurement [Member]
Notes	27.8	27.8
USG Prudential - ID [Member]
Notes	18	18.6
USG Prudential - ID [Member] | Estimate of Fair Value Measurement [Member]
Notes	18	18.6
USG Prudential - ID [Member] | Reported Value Measurement [Member]
Notes	18.4	18.9
USG DOE [Member]
Notes	47.3	48.3
USG DOE [Member] | Estimate of Fair Value Measurement [Member]
Notes	47.3	48.3
USG DOE [Member] | Reported Value Measurement [Member]
Notes	49.8	51.4
Senior Unsecured Bonds [Member]
Senior Unsecured debt	199.3	199.4
Senior Unsecured Bonds [Member] | Estimate of Fair Value Measurement [Member]
Senior Unsecured debt	199.3	199.4
Senior Unsecured Bonds [Member] | Reported Value Measurement [Member]
Senior Unsecured debt	204.3	204.3
Senior Unsecured Loan [Member]
Senior Unsecured debt	153.6	102.2
Senior Unsecured Loan [Member] | Estimate of Fair Value Measurement [Member]
Senior Unsecured debt	153.6	102.2
Senior Unsecured Loan [Member] | Reported Value Measurement [Member]
Senior Unsecured debt	$ 150	$ 100

Note 5 - Fair Value of Financ_6

Note 5 - Fair Value of Financial Instruments - Fair Value of Financial Instruments (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Revolving lines of credit	$ 60.9	$ 159
Deposits	11.9	12
Olkaria III OPIC [Member]
Loans	210	211.8
Olkaria IV Loan - DEG 2 [Member]
Loans	48.6
Olkaria IV Loan - DEG 3 [Member]
Loans	42.5
Platanares Loan - OPIC [Member]
Loans	118.5	119.1
Amatitlan Loan [Member]
Loans	29	29.9
OrCal Geothermal Inc [Member]
Notes	19.2	19
OFC Senior Secured Notes [Member]
Notes	213.4	214.5
Don A. Campbell 1 ("DAC1") [Member]
Notes	78.6	78.8
USG Prudential - NV [Member]
Notes	29.9	29.4
USG Prudential - ID [Member]
Notes	18	18.6
USG DOE [Member]
Notes	47.3	48.3
Senior Unsecured Bonds [Member]
Senior Unsecured debt	199.3	199.4
Senior Unsecured Loan [Member]
Senior Unsecured debt	153.6	102.2
Other Long-term Debt [Member]
Senior Unsecured debt	5.3	5.4
Fair Value, Inputs, Level 1 [Member]
Revolving lines of credit
Deposits	11.9	12
Fair Value, Inputs, Level 1 [Member] | Olkaria III OPIC [Member]
Loans
Fair Value, Inputs, Level 1 [Member] | Olkaria IV Loan - DEG 2 [Member]
Loans
Fair Value, Inputs, Level 1 [Member] | Olkaria IV Loan - DEG 3 [Member]
Loans
Fair Value, Inputs, Level 1 [Member] | Platanares Loan - OPIC [Member]
Loans
Fair Value, Inputs, Level 1 [Member] | Amatitlan Loan [Member]
Loans
Fair Value, Inputs, Level 1 [Member] | OrCal Geothermal Inc [Member]
Notes
Fair Value, Inputs, Level 1 [Member] | OFC Senior Secured Notes [Member]
Notes
Fair Value, Inputs, Level 1 [Member] | Don A. Campbell 1 ("DAC1") [Member]
Notes
Fair Value, Inputs, Level 1 [Member] | USG Prudential - NV [Member]
Notes
Fair Value, Inputs, Level 1 [Member] | USG Prudential - ID [Member]
Notes
Fair Value, Inputs, Level 1 [Member] | USG DOE [Member]
Notes
Fair Value, Inputs, Level 1 [Member] | Senior Unsecured Bonds [Member]
Senior Unsecured debt
Fair Value, Inputs, Level 1 [Member] | Senior Unsecured Loan [Member]
Senior Unsecured debt
Fair Value, Inputs, Level 1 [Member] | Other Long-term Debt [Member]
Senior Unsecured debt
Fair Value, Inputs, Level 2 [Member]
Revolving lines of credit	60.9	159
Deposits
Fair Value, Inputs, Level 2 [Member] | Olkaria III OPIC [Member]
Loans
Fair Value, Inputs, Level 2 [Member] | Olkaria IV Loan - DEG 2 [Member]
Loans
Fair Value, Inputs, Level 2 [Member] | Olkaria IV Loan - DEG 3 [Member]
Loans
Fair Value, Inputs, Level 2 [Member] | Platanares Loan - OPIC [Member]
Loans
Fair Value, Inputs, Level 2 [Member] | Amatitlan Loan [Member]
Loans	29	29.9
Fair Value, Inputs, Level 2 [Member] | OrCal Geothermal Inc [Member]
Notes
Fair Value, Inputs, Level 2 [Member] | OFC Senior Secured Notes [Member]
Notes
Fair Value, Inputs, Level 2 [Member] | Don A. Campbell 1 ("DAC1") [Member]
Notes
Fair Value, Inputs, Level 2 [Member] | USG Prudential - NV [Member]
Notes
Fair Value, Inputs, Level 2 [Member] | USG Prudential - ID [Member]
Notes
Fair Value, Inputs, Level 2 [Member] | USG DOE [Member]
Notes
Fair Value, Inputs, Level 2 [Member] | Senior Unsecured Bonds [Member]
Senior Unsecured debt
Fair Value, Inputs, Level 2 [Member] | Senior Unsecured Loan [Member]
Senior Unsecured debt
Fair Value, Inputs, Level 2 [Member] | Other Long-term Debt [Member]
Senior Unsecured debt
Fair Value, Inputs, Level 3 [Member]
Revolving lines of credit
Deposits
Fair Value, Inputs, Level 3 [Member] | Olkaria III OPIC [Member]
Loans	210	211.8
Fair Value, Inputs, Level 3 [Member] | Olkaria IV Loan - DEG 2 [Member]
Loans	48.6	47.2
Fair Value, Inputs, Level 3 [Member] | Olkaria IV Loan - DEG 3 [Member]
Loans	42.5
Fair Value, Inputs, Level 3 [Member] | Platanares Loan - OPIC [Member]
Loans	118.5	119.1
Fair Value, Inputs, Level 3 [Member] | Amatitlan Loan [Member]
Loans
Fair Value, Inputs, Level 3 [Member] | OrCal Geothermal Inc [Member]
Notes	19.2	19
Fair Value, Inputs, Level 3 [Member] | OFC Senior Secured Notes [Member]
Notes	213.4	214.5
Fair Value, Inputs, Level 3 [Member] | Don A. Campbell 1 ("DAC1") [Member]
Notes	78.6	78.8
Fair Value, Inputs, Level 3 [Member] | USG Prudential - NV [Member]
Notes	29.9	29.4
Fair Value, Inputs, Level 3 [Member] | USG Prudential - ID [Member]
Notes	18	18.6
Fair Value, Inputs, Level 3 [Member] | USG DOE [Member]
Notes	47.3	48.3
Fair Value, Inputs, Level 3 [Member] | Senior Unsecured Bonds [Member]
Senior Unsecured debt	199.3	199.4
Fair Value, Inputs, Level 3 [Member] | Senior Unsecured Loan [Member]
Senior Unsecured debt	153.6	102.2
Fair Value, Inputs, Level 3 [Member] | Other Long-term Debt [Member]
Senior Unsecured debt	$ 5.3	$ 5.4

Note 6 - Stock-based Compensa_2

Note 6 - Stock-based Compensation (Details Textual) shares in Thousands	Mar. 31, 2019shares
The 2012 and 2004 Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	0

Note 7 - Interest Expense, Ne_2

Note 7 - Interest Expense, Net - Components of Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Interest related to sale of tax benefits	$ 3,661	$ 1,409
Interest expense	17,562	13,306
Less — amount capitalized		(371)
	$ 21,223	$ 14,344

Note 8 - Earnings Per Share (De

Note 8 - Earnings Per Share (Details Textual) - shares	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	249,908	62,409

Note 8 - Earnings Per Share - S

Note 8 - Earnings Per Share - Shares Used to Calculate Earnings Per Share (Details) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Weighted average number of shares used in computation of basic earnings per share (in shares)	50,709	50,614
Additional shares from the assumed exercise of employee stock options (in shares)	303	437
Weighted average number of shares used in computation of diluted earnings per share (in shares)	51,012	51,051

Note 9 - Business Segments (Det

Note 9 - Business Segments (Details Textual) $ in Thousands	3 Months Ended
	Mar. 31, 2019USD ($)	Mar. 31, 2018USD ($)	Dec. 31, 2018USD ($)
Number of Reportable Segments	3
Goodwill, Ending Balance	$ 20,123		$ 19,950
Electricity Segment [Member]
Goodwill, Ending Balance	20,100	$ 7,800
Other Segments [Member]
Goodwill, Ending Balance	0	13,500
Accounting Standards Update 2014-09 [Member] | Electricity Revenues [Member]
Revenue from Contract with Customer, Including Assessed Tax	$ 17,000	$ 6,700

Note 9 - Business Segments - Su

Note 9 - Business Segments - Summarized Financial Information Concerning Reportable Segments (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2019		Mar. 31, 2018		Dec. 31, 2018
Revenues		$ 199,038		$ 184,023
Operating income (loss)		53,725		54,593
Segment assets at period end		3,143,214	[1]	2,710,817	[1]	$ 3,121,350
Unconsolidated Investments [Member]
Segment assets at period end		71,885		63,109
Intersegment Eliminations [Member]
Revenues		18,261		24,827
Electricity Segment [Member]
Revenues		142,908		132,489
Operating income (loss)		51,551		46,412
Segment assets at period end	[1]	2,950,444		2,542,154
Electricity Segment [Member] | Unconsolidated Investments [Member]
Segment assets at period end		71,885		63,109
Electricity Segment [Member] | Intersegment Eliminations [Member]
Revenues
Product Segment [Member]
Revenues		52,128		48,672
Operating income (loss)		4,252		9,553
Segment assets at period end	[1]	125,248		114,815
Product Segment [Member] | Unconsolidated Investments [Member]
Segment assets at period end
Product Segment [Member] | Intersegment Eliminations [Member]
Revenues		18,261		24,827
Other Segments [Member]
Revenues		4,002		2,862
Operating income (loss)		(2,078)		(1,372)
Segment assets at period end	[1]	67,522		53,848
Other Segments [Member] | Unconsolidated Investments [Member]
Segment assets at period end
Other Segments [Member] | Intersegment Eliminations [Member]
Revenues
UNITED STATES
Revenues	[2]	106,773		86,739
UNITED STATES | Electricity Segment [Member]
Revenues	[2]	91,528		83,683
UNITED STATES | Product Segment [Member]
Revenues	[2]	11,243		194
UNITED STATES | Other Segments [Member]
Revenues	[2]	4,002		2,862
Foreign Countries [Member]
Revenues	[3]	92,265		97,284
Foreign Countries [Member] | Electricity Segment [Member]
Revenues	[3]	51,380		48,806
Foreign Countries [Member] | Product Segment [Member]
Revenues	[3]	40,885		48,478
Foreign Countries [Member] | Other Segments [Member]
Revenues	[3]
[1]	Electricity segment assets include goodwill in the amount of $20.1 million and $7.8 million as of March 31, 2019 and 2018, respectively. Other segment assets include goodwill in the amount of $13.5 million as of March 31, 2018. No goodwill is included in the Other segments assets as of March 31, 2019.
[2]	Electricity segment revenues in the United States are all accounted under ASC 842, Leases, except for $17.0 million in the three months ended March 31, 2019 that are accounted under ASC 606. For the three months ended March 31, 2018, Electricity segment revenues in the United States are all accounted under ASC 840, Leases, except for $6.7 million that are accounted under ASC 606.
[3]	For the three months ended March 31, 2019, Electricity segment revenues in foreign countries are all accounted under ASC 842, Leases, and Product revenues in foreign countries are accounted under ASC 606. For the three months ended March 31, 2018, Electricity segment revenues in foreign countries are all accounted under ASC 840, Leases, and Product revenues in foreign countries are accounted under ASC 606.

Note 9 - Business Segments - Re

Note 9 - Business Segments - Reconciling Information Between Reportable Segments and Consolidated Totals (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenues	$ 199,038	$ 184,023
Operating income (loss)	53,725	54,593
Interest income	293	113
Interest expense, net	(21,223)	(14,344)
Derivatives and foreign currency transaction gains (losses)	472	(1,599)
Income attributable to sale of tax benefits	7,764	7,361
Other non-operating income (expense), net	91	(20)
Total consolidated income from operations before income taxes and equity in earnings of investees	41,122	46,104
Intersegment Eliminations [Member]
Revenues	18,261	24,827
Consolidation, Eliminations [Member]
Revenues	$ (18,261)	$ (24,827)

Note 10 - Commitments and Con_2

Note 10 - Commitments and Contingencies (Details Textual) - Former Local Sales Representative vs. Ormat [Member] - Pending Litigation [Member] $ in Millions	Mar. 29, 2016USD ($)
Loss Contingency, Damages Sought, Value	$ 4.6
Loss Contingency, Additional Damages Sought for Ormat Geothermal Products Sales in Chile, Percent	3.75%
Loss Contingency, Damages Sought, Ormat Geothermal Products Sales in Chile, Period	10 years

Note 11 - Income Taxes (Details

Note 11 - Income Taxes (Details Textual) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Effective Income Tax Rate Reconciliation, Percent, Total	34.10%	(58.40%)
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%
Tax Cuts and Jobs Act, Interest Deduction Limits, Percentage of Adjusted Taxable Income Allowed	30.00%
Deferred Tax Asset, Interest Carryforward	$ 8.8

Note 12 - Subsequent Events (De

Note 12 - Subsequent Events (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	May 06, 2019	Mar. 31, 2019	Mar. 31, 2018
Dividends, Common Stock, Total		$ 5,579	$ 11,640
Subsequent Event [Member]
Dividends, Common Stock, Total	$ 5,600
Common Stock, Dividends, Per Share, Declared	$ 0.11
Dividends Payable, Date Declared	May 6, 2019
Dividends Payable, Date of Record	May 20, 2019
Dividends Payable, Date to be Paid	May 28, 2019