Ormat (ORA) 10-Q 5 Aug 21 2021 Q2 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	6 Months Ended
	Jun. 30, 2021	Jul. 30, 2021
Document Information [Line Items]
Entity Central Index Key	0001296445
Entity Registrant Name	ORMAT TECHNOLOGIES, INC.
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2021
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2021
Document Transition Report	false
Entity File Number	001-32347
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	88-0326081
Entity Address, Address Line One	6140 Plumas Street
Entity Address, City or Town	Reno
Entity Address, State or Province	NV
Entity Address, Postal Zip Code	89519-6075
City Area Code	775
Local Phone Number	356-9029
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		55,997,406
Title of 12(b) Security	Common Stock
Trading Symbol	ORA
Security Exchange Name	NYSE

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands		Jun. 30, 2021		Dec. 31, 2020
Current assets:
Cash and cash equivalents		$ 250,009		$ 448,252
Marketable securities at fair value		45,960		0
Restricted cash and cash equivalents (primarily related to VIEs)		79,868		88,526
Receivables:
Trade less allowance for credit losses of $419 and $597, respectively (primarily related to VIEs)		137,688		149,170
Other		11,881		17,987
Inventories		28,526		35,321
Costs and estimated earnings in excess of billings on uncompleted contracts	[1]	13,837		24,544
Prepaid expenses and other		20,220		15,354
Total current assets		587,989		779,154
Investment in unconsolidated companies		103,890		98,217
Deposits and other		57,347		66,989
Deferred income taxes		124,284		119,299
Property, plant and equipment, net		2,175,637		2,099,046
Construction-in-process		531,634		479,315
Operating leases right of use		19,765		16,347
Finance leases right of use		7,633		11,633
Intangible assets, net		185,508		194,421
Goodwill		24,863		24,566
Total assets		3,818,550	[2],[3]	3,888,987
Current liabilities:
Accounts payable and accrued expenses		108,408		152,763
Billings in excess of costs and estimated earnings on uncompleted contracts		13,452		11,179
Current portion of long-term debt:
Senior secured notes		25,144		24,949
Other loans		36,265		35,897
Full recourse		56,843		17,768
Operating lease liabilities		2,978		2,922
Finance lease liabilities		3,139		3,169
Total current liabilities		246,229		248,647
Long-term debt, net of current portion:
Senior secured notes (less deferred financing costs of $4,852 and $5,318, respectively)		301,330		315,195
Senior unsecured bonds (less deferred financing costs of $1,906 and $2,086, respectively)		674,643		717,534
Operating lease liabilities		16,531		12,897
Finance lease liabilities		5,190		9,104
Liability associated with sale of tax benefits		101,883		111,476
Deferred income taxes		88,156		87,972
Liability for unrecognized tax benefits		3,464		1,970
Liabilities for severance pay		17,691		18,749
Asset retirement obligation		65,342		63,457
Other long-term liabilities		6,094		6,235
Total liabilities		1,848,824		1,937,720
Commitments and contingencies (Note 10)
Redeemable noncontrolling interest		9,871		9,830
Equity:
Common stock, par value $0.001 per share; 200,000,000 shares authorized; 55,997,406 and 55,983,259 issued and outstanding as of June 30, 2021 and December 31, 2020, respectively		56		56
Additional paid-in capital		1,267,451		1,262,446
Retained earnings		565,222		550,103
Accumulated other comprehensive income (loss)		(7,646)		(6,620)
Total stockholders' equity attributable to Company's stockholders		1,825,083		1,805,985
Noncontrolling interest		134,772		135,452
Total equity		1,959,855		1,941,437
Total liabilities, redeemable noncontrolling interest and equity		3,818,550		3,888,987
Other Loans, Limited and Non-recourse [Member]
Long-term debt, net of current portion:
Other loans (less deferred financing costs)		267,310		284,928
Other Loans, Full Recourse [Member]
Long-term debt, net of current portion:
Other loans (less deferred financing costs)		$ 54,961		$ 59,556
[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 condensed consolidated balance sheets. The contract liabilities balance at the beginning of the year was not yet recognized as product revenues during the six months ended June 30, 2021 as a result of performance obligations having not been satisfied yet.
[2]	Electricity segment assets include goodwill in the amount of $20.2 million and $20.1 million as of June 30, 2021 and 2020, respectively. Energy Storage segment assets include goodwill in the amount of $4.6 million and none as of June 30, 2021 and 2020, respectively. No goodwill is included in the Product segment assets as of June 30, 2021 and 2020.
[3]	Including unconsolidated investments

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Trade, allowance for credit losses	$ 419	$ 597
Property, plant and equipment, net	2,175,637	2,099,046
Construction-in-process	531,634	479,315
Operating leases right of use	19,765	16,347
Finance leases right of use	$ 7,633	$ 11,633
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)	55,997,406	55,983,259
Common stock, shares outstanding (in shares)	55,997,406	55,983,259
Senior Secured Notes [Member]
Deferred financing costs	$ 4,852	$ 5,318
Other Loans, Limited and Non-recourse [Member]
Deferred financing costs	7,716	8,557
Senior Unsecured Bonds [Member]
Deferred financing costs	1,906	2,086
Other Loans, Full Recourse [Member]
Deferred financing costs	1,251	1,340
Variable Interest Entity, Primary Beneficiary [Member]
Property, plant and equipment, net	2,037,735	1,978,220
Construction-in-process	241,954	198,812
Operating leases right of use	7,130	4,712
Finance leases right of use	$ 256	$ 7,001

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenues:
Revenue	$ 146,901	$ 174,900	$ 313,253	$ 367,013
Cost of revenues:
Cost of revenues	94,926	109,514	187,631	219,809
Gross profit	51,975	65,386	125,622	147,204
Operating expenses:
Research and development expenses	1,128	1,172	2,004	2,791
Selling and marketing expenses	3,988	4,854	8,264	9,648
General and administrative expenses	18,240	11,870	36,846	28,615
Business interruption insurance income	0	(585)	0	(2,982)
Operating income	28,619	48,075	78,508	109,132
Other income (expense):
Interest income	808	441	1,071	843
Interest expense, net	(18,626)	(19,785)	(37,642)	(37,058)
Derivatives and foreign currency transaction gains (losses)	658	671	(16,208)	1,064
Income attributable to sale of tax benefits	7,420	5,672	13,775	9,804
Other non-operating income (expense), net	(21)	304	(352)	382
Income from operations before income tax and equity in earnings (losses) of investees	18,858	35,378	39,152	84,167
Income tax provision	(4,268)	(11,766)	(7,275)	(29,914)
Equity in earnings (losses) of investees, net	605	1,658	1,147	923
Net income	15,195	25,270	33,024	55,176
Net income attributable to noncontrolling interest	(2,169)	(2,224)	(4,739)	(6,097)
Net income attributable to the Company's stockholders	13,026	23,046	28,285	49,079
Comprehensive income:
Net income	15,195	25,270	33,024	55,176
Other comprehensive income (loss), net of related taxes:
Change in foreign currency translation adjustments	416	921	(1,410)	276
Change in unrealized gains or losses in respect of the Company's share in derivatives instruments of unconsolidated investment	(1,234)	(653)	2,521	(5,408)
Change in unrealized gains or losses in respect of a cross currency swap derivative instrument that qualifies as a cash flow hedge	198	0	(2,600)	0
Change in unrealized gains or losses on marketable securities available-for-sale (net of related tax of $0)	9	0	(11)	0
Other changes in comprehensive income	17	12	33	17
Comprehensive income	14,601	25,550	31,557	50,061
Comprehensive income attributable to noncontrolling interest	(2,301)	(2,763)	(4,298)	(6,249)
Comprehensive income attributable to the Company's stockholders	$ 12,300	$ 22,787	$ 27,259	$ 43,812
Earnings per share attributable to the Company's stockholders:
Basic: (in dollars per share)	$ 0.23	$ 0.45	$ 0.51	$ 0.96
Diluted: (in dollars per share)	$ 0.23	$ 0.45	$ 0.50	$ 0.95
Weighted average number of shares used in computation of earnings per share attributable to the Company's stockholders:
Basic (in shares)	55,992	51,043	55,990	51,040
Diluted (in shares)	56,316	51,362	56,502	51,448
Electricity [Member]
Revenues:
Revenue	$ 133,864	$ 128,685	$ 278,852	$ 271,541
Cost of revenues:
Cost of revenues	83,736	71,950	163,587	143,318
Product [Member]
Revenues:
Revenue	7,410	43,701	16,053	91,112
Cost of revenues:
Cost of revenues	5,924	34,709	13,998	71,687
Energy Storage and Management Services [Member]
Revenues:
Revenue	5,627	2,514	18,348	4,360
Cost of revenues:
Cost of revenues	$ 5,266	$ 2,855	$ 10,046	$ 4,804

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited) (Parentheticals) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2021	Mar. 31, 2021
Change in unrealized gains or losses on marketable securities available-for-sale, tax	$ 0	$ 0

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands		Cumulative Effect, Period of Adoption, Adjustment [Member]Common Stock [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]Additional Paid-in Capital [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]Retained Earnings [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]AOCI Attributable to Parent [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]Parent [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]Noncontrolling Interest [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member]Common Stock [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member]Additional Paid-in Capital [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member]Retained Earnings [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member]AOCI Attributable to Parent [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member]Parent [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member]Noncontrolling Interest [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member]	Cross Currency Interest Rate Contract [Member]Common Stock [Member]	Cross Currency Interest Rate Contract [Member]Additional Paid-in Capital [Member]	Cross Currency Interest Rate Contract [Member]Retained Earnings [Member]	Cross Currency Interest Rate Contract [Member]AOCI Attributable to Parent [Member]	Cross Currency Interest Rate Contract [Member]Parent [Member]	Cross Currency Interest Rate Contract [Member]Noncontrolling Interest [Member]	Cross Currency Interest Rate Contract [Member]	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, 2019									51,032														51,032
Balance in Other comprehensive income (loss) beginning of period at Dec. 31, 2019		$ 0	$ 0	$ (755)	$ 0	$ (755)	$ 0	$ (755)	$ 51	$ 913,150	$ 487,118	$ (8,654)	$ 1,391,665	$ 122,990	$ 1,514,655								$ 51	$ 913,150	$ 487,873	$ (8,654)	$ 1,392,420	$ 122,990	$ 1,515,410
Stock-based compensation																							$ 0	1,989	0	0	1,989	0	1,989
Exercise of stock-based awards by employees and directors (*) (in shares)	[1]																						4
Exercise of stock-based awards by employees and directors (*)	[1]																						$ 0	0	0	0	0	0	0
Cash paid to noncontrolling interest																							0	0	0	0	0	(3,007)	(3,007)
Cash dividend declared																							0	0	(5,614)	0	(5,614)	0	(5,614)
Increase in noncontrolling interest																							0	0	0	0	0	1,447	1,447
Net income																							0	0	26,033	0	26,033	3,543	29,576
Foreign currency translation adjustments																							0	0	0	(258)	(258)	(387)	(645)
Change in respect of derivative instruments designated for cash flow hedge																$ 0	$ 0	$ 0	$ 13	$ 13	$ 0	$ 13
Change in unrealized gains or losses in respect of the Company's share in derivative instruments of unconsolidated investment																							0	0	0	(4,755)	(4,755)	0	(4,755)
Amortization of unrealized gains in respect of derivative instruments designated for cash flow hedge																							0	0	0	(8)	(8)	0	(8)
Change in unrealized gains or losses in respect of the Company's share in derivatives instruments of unconsolidated investment																							$ 0	0	0	(4,755)	(4,755)	0	(4,755)
Balance (in shares) at Mar. 31, 2020																							51,036
Balance in Other comprehensive income (loss) end of period at Mar. 31, 2020																							$ 51	915,139	507,537	(13,662)	1,409,065	124,586	1,533,651
Balance (in shares) at Dec. 31, 2019									51,032														51,032
Balance in Other comprehensive income (loss) beginning of period at Dec. 31, 2019		$ 0	$ 0	$ (755)	$ 0	$ (755)	$ 0	$ (755)	$ 51	$ 913,150	$ 487,118	$ (8,654)	$ 1,391,665	$ 122,990	$ 1,514,655								$ 51	913,150	487,873	(8,654)	1,392,420	122,990	1,515,410
Foreign currency translation adjustments																													276
Change in unrealized gains or losses in respect of the Company's share in derivative instruments of unconsolidated investment																													(5,408)
Change in unrealized gains or losses in respect of the Company's share in derivatives instruments of unconsolidated investment																													(5,408)
Change in unrealized gains or losses on marketable securities available-for-sale (net of related tax of $0)																													0
Other comprehensive income (loss)																													17
Balance (in shares) at Jun. 30, 2020																							51,067
Balance in Other comprehensive income (loss) end of period at Jun. 30, 2020																							$ 51	917,403	524,864	(13,921)	1,428,397	128,414	1,556,811
Balance (in shares) at Mar. 31, 2020																							51,036
Balance in Other comprehensive income (loss) beginning of period at Mar. 31, 2020																							$ 51	915,139	507,537	(13,662)	1,409,065	124,586	1,533,651
Stock-based compensation																							$ 0	2,264	0	0	2,264	0	2,264
Exercise of stock-based awards by employees and directors (*) (in shares)																							31
Exercise of stock-based awards by employees and directors (*)	[1]																						$ 0	0	0	0	0	0	0
Cash dividend declared																							0	0	(5,719)	0	(5,719)	0	(5,719)
Increase in noncontrolling interest																							0	0	0	0	0	1,307	1,307
Net income																							0	0	23,046	0	23,046	1,982	25,028
Foreign currency translation adjustments																							0	0	0	382	382	539	921
Change in respect of derivative instruments designated for cash flow hedge																0	0	0	17	17	0	17
Change in unrealized gains or losses in respect of the Company's share in derivative instruments of unconsolidated investment																							0	0	0	(653)	(653)	0	(653)
Amortization of unrealized gains in respect of derivative instruments designated for cash flow hedge																							0	0	0	(5)	(5)	0	(5)
Change in unrealized gains or losses in respect of the Company's share in derivatives instruments of unconsolidated investment																							$ 0	0	0	(653)	(653)	0	(653)
Change in unrealized gains or losses on marketable securities available-for-sale (net of related tax of $0)																													0
Other comprehensive income (loss)																													12
Balance (in shares) at Jun. 30, 2020																							51,067
Balance in Other comprehensive income (loss) end of period at Jun. 30, 2020																							$ 51	917,403	524,864	(13,921)	1,428,397	128,414	1,556,811
Balance (in shares) at Dec. 31, 2020																							55,983
Balance in Other comprehensive income (loss) beginning of period at Dec. 31, 2020																							$ 56	1,262,446	550,103	(6,620)	1,805,985	135,452	1,941,437
Stock-based compensation																							$ 0	2,097	0	0	2,097	0	2,097
Exercise of stock-based awards by employees and directors (*) (in shares)	[1]																						1
Exercise of stock-based awards by employees and directors (*)	[1]																						$ 0	0	0	0	0	0	0
Cash paid to noncontrolling interest																							0	0	0	0	0	(3,898)	(3,898)
Cash dividend declared																							0	0	(6,718)	0	(6,718)	0	(6,718)
Net income																							0	0	15,259	0	15,259	2,290	17,549
Foreign currency translation adjustments																							0	0	0	(1,253)	(1,253)	(573)	(1,826)
Change in respect of derivative instruments designated for cash flow hedge																$ 0	$ 0	$ 0	$ (2,798)	$ (2,798)	$ 0	$ (2,798)
Change in unrealized gains or losses in respect of the Company's share in derivative instruments of unconsolidated investment																							0	0	0	3,755	3,755	0	3,755
Stock issuance costs reimbursement																							0	285	0	0	285	0	285
Change in unrealized gains or losses in respect of the Company's share in derivatives instruments of unconsolidated investment																							0	0	0	3,755	3,755	0	3,755
Change in unrealized gains or losses on marketable securities available-for-sale (net of related tax of $0)																							0	0	0	(20)	(20)	0	(20)
Other comprehensive income (loss)																							$ 0	0	0	16	16	0	16
Balance (in shares) at Mar. 31, 2021																							55,984
Balance in Other comprehensive income (loss) end of period at Mar. 31, 2021																							$ 56	1,264,828	558,644	(6,920)	1,816,608	133,271	1,949,879
Balance (in shares) at Dec. 31, 2020																							55,983
Balance in Other comprehensive income (loss) beginning of period at Dec. 31, 2020																							$ 56	1,262,446	550,103	(6,620)	1,805,985	135,452	1,941,437
Foreign currency translation adjustments																													(1,410)
Change in unrealized gains or losses in respect of the Company's share in derivative instruments of unconsolidated investment																													2,521
Change in unrealized gains or losses in respect of the Company's share in derivatives instruments of unconsolidated investment																													2,521
Change in unrealized gains or losses on marketable securities available-for-sale (net of related tax of $0)																													(11)
Other comprehensive income (loss)																													33
Balance (in shares) at Jun. 30, 2021																							55,997
Balance in Other comprehensive income (loss) end of period at Jun. 30, 2021																							$ 56	1,267,451	565,222	(7,646)	1,825,083	134,772	1,959,855
Balance (in shares) at Mar. 31, 2021																							55,984
Balance in Other comprehensive income (loss) beginning of period at Mar. 31, 2021																							$ 56	1,264,828	558,644	(6,920)	1,816,608	133,271	1,949,879
Stock-based compensation																							$ 0	2,623	0	0	2,623	0	2,623
Exercise of stock-based awards by employees and directors (*) (in shares)	[1]																						13
Exercise of stock-based awards by employees and directors (*)	[1]																						$ 0	0	0	0	0	0	0
Cash paid to noncontrolling interest																							0	0	0	0	0	(426)	(426)
Cash dividend declared																							0	0	(6,448)	0	(6,448)	0	(6,448)
Net income																							0	0	13,026	0	13,026	1,795	14,821
Foreign currency translation adjustments																							0	0	0	284	284	132	416
Change in respect of derivative instruments designated for cash flow hedge																							0	0	0	198	198	0	198
Change in unrealized gains or losses in respect of the Company's share in derivative instruments of unconsolidated investment																							0	0	0	(1,234)	(1,234)	0	(1,234)
Amortization of unrealized gains in respect of derivative instruments designated for cash flow hedge																							0	0	0	17	17	0	17
Change in unrealized gains or losses in respect of the Company's share in derivatives instruments of unconsolidated investment																							0	0	0	(1,234)	(1,234)	0	(1,234)
Change in unrealized gains or losses on marketable securities available-for-sale (net of related tax of $0)																							$ 0	0	0	9	9	0	9
Other comprehensive income (loss)																													17
Balance (in shares) at Jun. 30, 2021																							55,997
Balance in Other comprehensive income (loss) end of period at Jun. 30, 2021																							$ 56	$ 1,267,451	$ 565,222	$ (7,646)	$ 1,825,083	$ 134,772	$ 1,959,855
[1]	Resulted in an amount lower than $1 thousand.

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Equity (Unaudited) (Parentheticals) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Mar. 31, 2020
Retained Earnings [Member]
Cash dividend declared, per share (in dollars per share)		$ 0.11	$ 0.11
Cash dividend declared, per share (in dollars per share)	$ 0.12
Change in unrealized gains or losses in respect of the Company's share in derivative instruments of unconsolidated investment, tax	$ 0	$ 0
Amortization of unrealized gains in respect of derivative instruments designated for cash flow hedge, tax		$ 6
Change in unrealized gains or losses on marketable securities available-for-sale, tax	0
Amortization of unrealized gains in respect of derivative instruments designated for cash flow hedge, tax	$ 6

Condensed Consolidated Statem_5

Condensed Consolidated Statements of Cash Flow (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash flows from operating activities:
Net income	$ 33,024	$ 55,176
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	85,539	74,859
Accretion of asset retirement obligation	1,911	1,545
Stock-based compensation	4,720	4,253
Income attributable to sale of tax benefits, net of interest expense	(9,408)	(5,538)
Equity in earnings of investees	(1,147)	(923)
Mark-to-market of derivative instruments	1,096	(2,043)
Loss on disposal of property, plant and equipment	81	801
Loss (gain) on severance pay fund asset	105	38
Deferred income tax provision	(4,528)	19,731
Liability for unrecognized tax benefits	1,494	666
Changes in operating assets and liabilities, net of businesses acquired:
Receivables	9,926	(24,831)
Costs and estimated earnings in excess of billings on uncompleted contracts	10,707	18,888
Inventories	6,795	(3,983)
Prepaid expenses and other	(4,866)	1,719
Change in operating lease right of use asset	1,422	1,865
Deposits and other	(319)	1,048
Accounts payable and accrued expenses	(37,714)	10,009
Billings in excess of costs and estimated earnings on uncompleted contracts	2,273	2,844
Liabilities for severance pay	(1,058)	84
Change in operating lease liabilities	(1,153)	(1,634)
Other long-term liabilities	(56)	(220)
Net cash provided by operating activities	98,844	154,354
Cash flows from investing activities:
Purchase of marketable securities	(47,621)	0
Maturities of marketable securities	1,650	0
Capital expenditures	(207,888)	(151,254)
Investment in unconsolidated companies	(2,005)	(7,759)
Decrease (increase) in severance pay fund asset, net of payments made to retired employees	1,352	(14)
Net cash used in investing activities	(254,512)	(159,027)
Cash flows from financing activities:
Proceeds from long-term loans, net of transaction costs	0	129,407
Repayments of commercial paper and prepayment of loans	0	(46,225)
Proceeds from revolving credit lines with banks	0	1,250,639
Repayment of revolving credit lines with banks	0	(1,191,132)
Cash received from noncontrolling interest	5,390	7,577
Repayments of long-term debt	(36,481)	(31,784)
Stock issuance costs reimbursement	285	0
Cash paid to noncontrolling interest	(5,214)	(3,661)
Payments under finance lease obligations	(1,558)	(1,389)
Deferred debt issuance costs	(232)	(677)
Cash dividends paid	(13,166)	(11,333)
Net cash provided by (used in) financing activities	(50,976)	101,422
Effect of exchange rate changes	(257)	(25)
Net change in cash and cash equivalents and restricted cash and cash equivalents	(206,901)	96,724
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	536,778	153,110
Cash and cash equivalents and restricted cash and cash equivalents at end of period	329,877	249,834
Supplemental non-cash investing and financing activities:
Increase (decrease) in accounts payable related to purchases of property, plant and equipment	(4,499)	(2,226)
Right of use assets obtained in exchange for new lease liabilities	$ 4,673	$ 2,135

Note 1 - General and Basis of P

Note 1 - General and Basis of Presentation	6 Months Ended
	Jun. 30, 2021
Notes to Financial Statements
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	NOTE 1 GENERAL AND BASIS OF PRESENTATION 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 June 30, 2021, three six June 30, 2021 2020 six June 30, 2021 2020. 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, 2020. December 31, 2020 December 31, 2020 not Dollar amounts, except per share data, in the notes to these financial statements are rounded to the closest $1,000. COVID- 19 In March 2020, 19" first 2021, one 19 not 19 19 2020 July 2021, two 12 19 2020 first 2021. 19 second 2021, In the Energy Storage segment, revenues are generated primarily from participating in the energy and ancillary services markets and therefore are directly impacted by the prevailing energy prices in those markets. While the extent and duration of the economic downturn from the COVID- 19 may 19 no Puna Power Plant On May 3, 2018, 38 three not first second 2021, not The Puna power plant resumed operations in November 2020 second 2021 25 28MW. 30 2021. In December 2019, 2052 46 no March 31, 2021, The Company continues to assess the accounting implications of these events on its assets and liabilities and whether any related assets may June 30, 2021, no February In February 2021, one February 15, 2021, 3 3" February 16, 2021 February 19, 2021, February 19, 2021, In addition, the Company recorded a provision for approximately $3.0 million for receivables related to imbalance charges from the grid operator in respect of its demand response operation as it estimated it is probable it may first 2021. The Company has filed billing disputes with ERCOT related to some of the imbalance charges and revenue allocated to its Demand Response services and customers, the outcome of which may Write-offs of unsuccessful exploration activities There were no write-offs of unsuccessful exploration activities for the three six June 30, 2021 2020. 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 as reported on the balance sheet to the total of the same amounts shown on the statement of cash flows: June 30, December 31, June 30, 2021 2020 2020 (Dollars in thousands) Cash and cash equivalents $ 250,009 $ 448,252 $ 173,718 Restricted cash and cash equivalents 79,868 88,526 76,116 Total Cash and cash equivalents and restricted cash and cash equivalents $ 329,877 $ 536,778 $ 249,834 Concentration of credit risk Financial instruments that potentially subject the Company to a concentration of credit risk consist principally of temporary cash investments, marketable securities 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 June 30, 2021 December 31, 2020, ten $250,000 June 30, 2021 December 31, 2020, At June 30, 2021 December 31, 2020, June 30, 2021 December 31, 2020, 10% The Company's revenues from its primary customers as a percentage of total revenues are as follows: Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 Sierra Pacific Power Company and Nevada Power Company 19.5 % 17.2 % 20.3 % 18.3 % Southern California Public Power Authority (“SCPPA”) 25.5 20.3 25.2 19.5 Kenya Power and Lighting Co. Ltd. ("KPLC") 17.3 16.0 16.4 15.7 The Company has historically been able to collect on substantially all of its receivable balances. As of June 30, 2021, July 2021. first second 2021 In Honduras, as of June 30, 2021, none July 2021. 19 may The Company may 19 See Note 4 Allowance for credit losses The Company performs an analysis of potential credit losses related to its financial instruments that are within the scope of ASU 2018 19, 325, may 19 19 not The following table describes the changes in the allowance for expected credit losses for the three six June 30, 2021 2020 Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 (Dollars in thousands) (Dollars in thousands) Beginning balance of the allowance for expected credit losses $ 597 $ 779 $ 597 $ 755 Change in the provision for expected credit losses for the period (178 ) — (178 ) 24 Ending balance of the allowance for expected credit losses $ 419 $ 779 $ 419 $ 779 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 the Company's Product segment reflect payments received in advance of the satisfaction of performance under the contract. The Company receives payments from customers based on the terms established in the contracts. Total contract assets and contract liabilities as of June 30, 2021 December 31, 2020 June 30, December 31, 2021 2020 (Dollars in thousands) Contract assets (*) $ 13,837 $ 24,544 Contract liabilities (*) $ (13,452 ) $ (11,179 ) (*) 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 condensed consolidated balance sheets. The contract liabilities balance at the beginning of the year was not six June 30, 2021 not On June 30, 2021, not Disaggregated revenues from contracts with customers for the three six June 30, 2021 2020 9 Leases in which the Company is a lessor The table below presents lease income recognized as a lessor: Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 (Dollars in thousands) (Dollars in thousands) Lease income relating to lease payments from operating leases $ 113,113 $ 113,083 $ 238,860 $ 239,159 Marketable securities The Company’s investments in marketable securities consist of debt securities with maturity of up to one three Derivative instruments Derivative instruments (including certain derivative instruments embedded in other contracts) are measured at their fair value and recorded as either assets or liabilities unless exempted from derivative treatment as a normal purchase and sale. Changes in the fair value of derivatives not The Company maintains a risk management strategy that may

Note 2 - New Accounting Pronoun

Note 2 - New Accounting Pronouncements	6 Months Ended
	Jun. 30, 2021
Notes to Financial Statements
Accounting Standards Update and Change in Accounting Principle [Text Block]	NOTE 2 NEW ACCOUNTING PRONOUNCEMENTS New accounting pronouncements effective in the six June 30, 2021 Accounting for Income Taxes In December 2019, 2019 12, 740 2019 12 740. December 15, 2020 2019 12 January 1, 2021. not New accounting pronouncements effective in future periods There are no

Note 3 - Inventories

Note 3 - Inventories	6 Months Ended
	Jun. 30, 2021
Notes to Financial Statements
Inventory Disclosure [Text Block]	NOTE 3 INVENTORIES Inventories consist of the following: June 30, December 31, 2021 2020 (Dollars in thousands) Raw materials and purchased parts for assembly $ 11,097 $ 14,835 Self-manufactured assembly parts and finished products 17,429 20,486 Total inventories $ 28,526 $ 35,321

Note 4 - Marketable Securities

Note 4 - Marketable Securities	6 Months Ended
	Jun. 30, 2021
Notes to Financial Statements
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]	NOTE 4 MARKETABLE SECURITIES Marketable securities are presented at fair value and include investments in debt securities classified as available for sale. All marketable securities have maturities of less than a year. Investment in marketable securities is comprised of the following: June 30, 2021 Amortized cost Gross unrealized gains Gross unrealized losses Fair value (Dollars in thousands) Debt security type: Corporate bonds $ 30,472 $ — $ (10 ) $ 30,707 Commercial paper 11,465 — — 11,465 Money market funds 17,053 — — 17,053 Foreign issuers 2,841 — (1 ) 2,849 Municipal bonds 920 — — 938 Total debt securities available for sale $ 62,751 $ — $ (11 ) $ 63,012 As of June 30, 2021, The following table summarizes the fair value and gross unrealized losses of debt securities with unrealized losses aggregated by security type and length of time that the fair value had been below amortized cost, on an individual security basis: June 30, 2021 Less than 12 months Greater than 12 months Fair value Gross unrealized loss Fair value Gross unrealized loss (Dollars in thousands) Debt security type: Corporate bonds $ 30,707 $ (10 ) $ — $ — Commercial paper 11,465 — — — Money market funds 17,053 — — — Foreign issuers 2,849 (1 ) — — Municipal bonds 938 — — — Total debt securities available for sale $ 63,012 $ (11 ) $ — $ — There were no sales of investments in debt securities during the six June 30, 2021 2020.

Note 5 - Fair Value of Financia

Note 5 - Fair Value of Financial Instruments	6 Months Ended
	Jun. 30, 2021
Notes to Financial Statements
Fair Value Disclosures [Text Block]	NOTE 5 FAIR VALUE OF FINANCIAL INSTRUMENTS 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 June 30, 2021 December 31, 2020 June 30, 2021 Fair Value Carrying Value at June 30, 2021 Total Level 1 Level 2 Level 3 (Dollars in thousands) Assets: Current assets: Cash equivalents (including restricted cash accounts) $ 30,410 $ 30,410 $ 30,410 $ — $ — Marketable securities (including cash equivalents) 63,012 63,012 63,012 — — Derivatives: Currency forward contracts (2) 458 458 — 458 — Long-term Assets: Cross currency swap (3) 19,316 19,316 — 19,316 — Liabilities: Current liabilities: Derivatives: Cross currency swap (3) (562 ) (562 ) — (562 ) — Long term liabilities: Contingent payables (1) (2,550 ) (2,550 ) — — (2,550 ) $ 110,084 $ 110,084 $ 93,422 $ 19,212 $ (2,550 ) December 31, 2020 Fair Value Carrying Value at December 31, 2020 Total Level 1 Level 2 Level 3 (Dollars in thousands) Assets Current assets: Cash equivalents (including restricted cash accounts) $ 28,653 $ 28,653 $ 28,653 $ — $ — Derivatives: Contingent receivables (1) 111 111 — — 111 Currency forward contracts (2) 1,554 1,554 — 1,554 — Long-term assets: Cross currency swap (3) 27,829 27,829 — 27,829 — Liabilities: Current liabilities: Derivatives: Contingent payables (1) (549 ) (549 ) — — (549 ) Cross currency swap (3) (2,283 ) (2,283 ) — (2,283 ) — Long-term liabilities: Contingent payables (1) (2,630 ) (2,630 ) — — (2,630 ) $ 52,685 $ 52,685 $ 28,653 $ 27,100 $ (3,068 ) 1. These amounts relate to contingent receivables and payables and warrants pertaining to the Guadeloupe power plant purchase transaction, 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 June 30, 2021 December 31, 2020, 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 “Receivables, other” on June 30, 2021 December 31, 2020, 3. These amounts relate to cross currency swap contracts valued primarily based on the present value of the cross currency swap future settlement prices for U.S. Dollar ("USD") and New Israeli Shekel ("NIS") zero June 30, 2021 December 31, 2020, June 30, 2021 December 31, 2020 June 30, 2021 December 31, 2020. The following table presents the amounts of gain (loss) recognized in the consolidated statements of operations and comprehensive income on derivative instruments (in thousands): Amount of recognized gain (loss) Amount of recognized gain (loss) Derivatives not designated as hedging instruments Location of recognized gain (loss) Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 (Dollars in thousands) (Dollars in thousands) Swap transaction on RRS prices (1) Derivative and foreign currency transaction gains (losses) $ — $ — (14,540 ) — Currency forward contracts (1) Derivative and foreign currency transaction gains (losses) $ 1,200 $ 1,435 $ (269 ) $ 2,525 Derivatives designated as cash flow hedging instruments Cross currency swap (2) Derivative and foreign currency transaction gains (losses) $ 6,808 $ — $ (4,294 ) $ — ( 1 not third January 1, 2021 1 April 1, 2021. ( 2 1 There were no 1, 2 3 six June 30, 2021. The following table presents the effect of derivative instruments designated as cash flow hedges on the condensed consolidated statements of operations and comprehensive income (loss) for the three six June 30, 2021: Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 (Dollars in thousands) (Dollars in thousands) Cross currency swap cash flow hedge: Balance in Other comprehensive income (loss) beginning of period $ 568 $ — $ 3,366 $ — Gain or (loss) recognized in Other comprehensive income (loss) 7,006 — (6,894 ) — Amount reclassified from Other comprehensive income (loss) into earnings (6,808 ) — 4,294 — Balance in Other comprehensive income (loss) end of period $ 766 $ — $ 766 $ — The estimated net amount of existing gain (loss) that is reported in "Accumulated other comprehensive income (loss)" as of June 30, 2021 12 June 2031. The fair value of the Company’s long-term debt approximates its carrying amount, except for the following: Fair Value Carrying Amount June 30, 2021 December 31, 2020 June 30, 2021 December 31, 2020 (Dollars in millions) (Dollars in millions) Olkaria III Loan - DFC $ 179.3 $ 192.5 $ 165.7 $ 174.7 Olkaria III plant 4 Loan - DEG 2 37.8 40.4 35.0 37.5 Olkaria III plant 1 Loan - DEG 3 33.3 35.8 30.6 32.8 Platanares Loan - DFC 104.6 112.1 92.2 96.3 Amatitlan Loan 21.7 23.5 21.0 22.8 Senior Secured Notes: OFC 2 LLC ("OFC 2") 193.4 207.9 179.8 188.2 Don A. Campbell 1 ("DAC 1") 72.9 78.5 70.0 73.1 USG Prudential - NV 29.8 31.8 27.1 27.6 USG Prudential - ID 17.4 18.3 17.6 18.4 USG DOE 42.0 45.1 36.8 38.2 Senior Unsecured Bonds 570.4 585.1 524.8 529.1 Senior Unsecured Loan 216.5 222.2 200.0 200.0 Plumstriker 16.6 18.1 16.5 18.1 Other long-term debt 15.7 17.4 16.0 17.6 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. As disclosed above under Note 1 19 may 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 June 30, 2021: Level 1 Level 2 Level 3 Total (Dollars in millions) Olkaria III - DFC $ — $ — $ 179.3 $ 179.3 Olkaria III plant 4 Loan - DEG 2 — — 37.8 37.8 Olkaria III plant 1 Loan - DEG 3 — — 33.3 33.3 Platanares Loan - DFC — — 104.6 104.6 Amatitlan Loan — 21.7 — 21.7 Senior Secured Notes: OFC 2 Senior Secured Notes — — 193.4 193.4 DAC 1 Senior Secured Notes — — 72.9 72.9 USG Prudential - NV — — 29.8 29.8 USG Prudential - ID — — 17.4 17.4 USG DOE — — 42.0 42.0 Senior Unsecured Bonds — — 570.4 570.4 Senior Unsecured Loan — — 216.5 216.5 Plumstriker — 16.6 — 16.6 Other long-term debt — — 15.7 15.7 Deposits 14.2 — — 14.2 The following table presents the fair value of financial instruments as of December 31, 2020: Level 1 Level 2 Level 3 Total (Dollars in millions) Olkaria III Loan - DFC $ — $ — $ 192.5 $ 192.5 Olkaria IV - DEG 2 — — 40.4 40.4 Olkaria IV - DEG 3 — — 35.8 35.8 Platanares Loan - DFC — — 112.1 112.1 Amatitlan Loan — 23.5 — 23.5 Senior Secured Notes: OFC 2 Senior Secured Notes — — 207.9 207.9 DAC 1 Senior Secured Notes — — 78.5 78.5 USG Prudential - NV — — 31.8 31.8 USG Prudential - ID — — 18.3 18.3 USG DOE — — 45.1 45.1 Senior Unsecured Bonds — — 585.1 585.1 Senior Unsecured Loan — — 222.2 222.2 Plumstriker — 18.1 — 18.1 Other long-term debt — — 17.4 17.4 Deposits 14.8 — — 14.8

Note 6 - Stock-based Compensati

Note 6 - Stock-based Compensation	6 Months Ended
	Jun. 30, 2021
Notes to Financial Statements
Share-based Payment Arrangement [Text Block]	NOTE 6 STOCK-BASED COMPENSATION There were no first 2021.

Note 7 - Interest Expense, Net

Note 7 - Interest Expense, Net	6 Months Ended
	Jun. 30, 2021
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 June 30, Six Months Ended June 30, 2021 2020 2021 2020 (Dollars in thousands) (Dollars in thousands) Interest related to sale of tax benefits $ 2,545 $ 2,500 $ 4,938 $ 4,824 Interest expense 19,646 19,634 39,320 36,800 Less — amount capitalized (3,565 ) (2,349 ) (6,616 ) (4,566 ) Total interest expense, net $ 18,626 $ 19,785 $ 37,642 $ 37,058

Note 8 - Earnings Per Share

Note 8 - Earnings Per Share	6 Months Ended
	Jun. 30, 2021
Notes to Financial Statements
Earnings Per Share [Text Block]	NOTE 8 EARNINGS PER SHARE 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 June 30, Six Months Ended June 30, 2021 2020 2021 2020 Weighted average number of shares used in computation of basic earnings per share: 55,992 51,043 55,990 51,040 Additional shares from the assumed exercise of employee stock awards 324 319 512 408 Weighted average number of shares used in computation of diluted earnings per share 56,316 51,362 56,502 51,448 The number of stock-based awards that could potentially dilute future earnings per share and that were not three June 30, 2021 2020, six June 30, 2021 2020,

Note 9 - Business Segments

Note 9 - Business Segments	6 Months Ended
	Jun. 30, 2021
Notes to Financial Statements
Segment Reporting Disclosure [Text Block]	NOTE 9 BUSINESS SEGMENTS The Company has three • Under the Electricity segment, the Company builds, owns and operates geothermal, solar PV and recovered energy-based ("REG") power plants in the United States and geothermal power plants in other countries around the world and sell the electricity they generate. • Under the Product segment, the Company designs, manufactures and sells equipment for geothermal and recovered energy-based electricity generation and remote power units and provide services relating to the engineering, procurement and construction ("EPC") of geothermal and recovered energy-based power plants. • Under the Energy Storage segment, the Company provides energy storage and related services as well as services relating to the engineering, procurement, construction, operation and maintenance of energy storage units. To better reflect the significant business activities under this reporting segment, the Company renamed this reporting segment to be "Energy Storage" starting the fourth 2020. no 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, including the Company's disaggregated revenues from contracts with customers: Electricity Product Energy Storage Consolidated (Dollars in thousands) Three Months Ended June 30, 2021: Revenues from external customers: United States (1) $ 87,564 $ 647 $ 5,627 $ 93,838 Foreign (2) 46,300 6,763 — 53,063 Net revenue from external customers 133,864 7,410 5,627 146,901 Intersegment revenues (4) — 51,038 — — Operating income (loss) 30,018 (427 ) (972 ) 28,619 Segment assets at period end (3) (*) 3,530,256 122,868 165,426 3,818,550 * Including unconsolidated investments 103,890 — — 103,890 Three Months Ended June 30, 2020: Revenues from external customers: United States (1) $ 80,427 $ 2,269 $ 2,514 $ 85,210 Foreign (2) 48,258 41,432 — 89,690 Net revenue from external customers 128,685 43,701 2,514 174,900 Intersegment revenues (4) — 50,453 — — Operating income (loss) 45,875 3,803 (1,603 ) 48,075 Segment assets at period end (3) (*) 3,150,770 190,474 77,133 3,418,377 * Including unconsolidated investments 84,414 — — 84,414 Six Months Ended June 30, 2021: Revenues from external customers: United States (1) $ 186,540 $ 2,500 $ 18,348 $ 207,388 Foreign (2) 92,312 13,553 — 105,865 Net revenue from external customers 278,852 16,053 18,348 313,253 Intersegment revenues (4) — 76,372 — — Operating income (loss) 77,767 (1,638 ) 2,379 78,508 Segment assets at period end (3) (*) 3,530,256 122,868 165,426 3,818,550 * Including unconsolidated investments 103,890 — — 103,890 Six Months Ended June 30, 2020: Revenues from external customers: United States (1) $ 172,119 $ 2,667 $ 4,360 $ 179,146 Foreign (2) 99,422 88,445 — 187,867 Net revenue from external customers 271,541 91,112 4,360 367,013 Intersegment revenues (4) — 59,109 — — Operating income (loss) 104,505 7,675 (3,048 ) 109,132 Segment assets at period end (3) (*) 3,150,770 190,474 77,133 3,418,377 * Including unconsolidated investments 84,414 — — 84,414 ( 1 Electricity segment revenues in the United States are all accounted under lease accounting except for $20.8 million and $40.0 million for the three six June 30, 2021, three six June 30, 2020 , 606. 606. ( 2 Electricity segment revenues in foreign countries are all accounted under lease accounting. Product segment revenues in foreign countries are accounted under ASC 606. ( 3 Electricity segment assets include goodwill in the amount of $20.2 million and $20.1 million as of June 30, 2021 2020, none June 30, 2021 2020, June 30, 2021 2020. ( 4 Intersegment revenue are fully eliminated in consolidation. Reconciling information between reportable segments and the Company’s consolidated totals is shown in the following table: Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 (Dollars in thousands) (Dollars in thousands) Revenues: Total segment revenues $ 146,901 $ 174,900 $ 313,253 $ 367,013 Intersegment revenues 51,038 50,453 76,372 59,109 Elimination of intersegment revenues (51,038 ) (50,453 ) (76,372 ) (59,109 ) Total consolidated revenues $ 146,901 $ 174,900 $ 313,253 $ 367,013 Operating income: Operating income $ 28,619 $ 48,075 $ 78,508 $ 109,132 Interest income 808 441 1,071 843 Interest expense, net (18,626 ) (19,785 ) (37,642 ) (37,058 ) Derivatives and foreign currency transaction gains (losses) 658 671 (16,208 ) 1,064 Income attributable to sale of tax benefits 7,420 5,672 13,775 9,804 Other non-operating income (expense), net (21 ) 304 (352 ) 382 Total consolidated income before income taxes and equity in income of investees $ 18,858 $ 35,378 $ 39,152 $ 84,167

Note 10 - Commitments and Conti

Note 10 - Commitments and Contingencies	6 Months Ended
	Jun. 30, 2021
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	NOTE 10 COMMITMENTS AND CONTINGENCIES • On May 21, 2018, 11 August 3, 2017 May 13, 2018". 31 1 38C 10 10b 5 1 2017 2 May 16, 2018, May 11, 2018 2017 June 30, 2020, March 3, 2021, July 2, 2020 • On June 11, 2018, August 8, 2017 May 15, 2018 May 13, 2019. 10 10b 5 20 10 December 31, 2016 2017, 10 nine September 30, 2017 December 6, 2019 March 23, 2020, June 10, 2020, January 21, 2021, • On September 11, 2018, October 22, 2018, four 14 2018 January 24, 2019, July 10, 2020, October 12, 2020, November 24, 2020, March 22, 2021. March 29, 2021, • On March 29, 2016, 27th 11th April 16, 2020, 11th not May 2020, October 19, 2020, two may • On March 3, 2021, 23 July 1, 2021, 10 20 1934, March 1, 2021. may 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 the Company's 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 Other matters On March 2, 2021,

Note 11 - Income Taxes

Note 11 - Income Taxes	6 Months Ended
	Jun. 30, 2021
Notes to Financial Statements
Income Tax Disclosure [Text Block]	NOTE 11 INCOME TAXES The Company’s effective tax rate provision (benefit) for the three June 30, 2021 2020 six June 30, 2021 2020, In response to the COVID- 19 March 27, 2020 six June 30, 2021, no 19

Note 12 - Subsequent Events

Note 12 - Subsequent Events	6 Months Ended
	Jun. 30, 2021
Notes to Financial Statements
Subsequent Events [Text Block]	NOTE 12 SUBSEQUENT EVENTS Cash Dividend On August 4, 2021, August 18, 2021 September 1, 2021 Geothermal assets purchase transaction On July 14, 2021, two 67.5 one June 30, 2021. two 2038 December 2025, The Company will account for the transaction under ASC 805, Hapoalim loan On July 12, 2021, 14 December 12, 2021. The Hapoalim Loan Agreement includes various affirmative and negative covenants, including a requirement that the Company maintain (i) a financial debt to adjusted EBITDA ratio not 6, not not 25%. The Hapoalim Loan Agreement includes other customary affirmative and negative covenants, including payment and covenant events of default. HSBC loan On July 15, 2021, 14 January 19, 2022. The HSBC Loan Agreement includes various affirmative and negative covenants, including a requirement that the Company maintain (i) a financial debt to adjusted EBITDA ratio not 6, not not 25%. The HSBC Loan Agreement includes other customary affirmative and negative covenants, including payment and covenant events of default. The proceeds from the Hapoalim Loan and the HSBC Loan were used to pay for the purchase of the geothermal assets portfolio from TG Geothermal Portfolio, LLC as described above.

Significant Accounting Policies

Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2021
Accounting Policies [Abstract]
Effect of COVID-19 Pandemic, Policy [Policy Text Block]	COVID- 19 In March 2020, 19" first 2021, one 19 not 19 19 2020 July 2021, two 12 19 2020 first 2021. 19 second 2021, In the Energy Storage segment, revenues are generated primarily from participating in the energy and ancillary services markets and therefore are directly impacted by the prevailing energy prices in those markets. While the extent and duration of the economic downturn from the COVID- 19 may 19 no
Puna Power Plant, Policy [Policy Text Block]	Puna Power Plant On May 3, 2018, 38 three not first second 2021, not The Puna power plant resumed operations in November 2020 second 2021 25 28MW. 30 2021. In December 2019, 2052 46 no March 31, 2021, The Company continues to assess the accounting implications of these events on its assets and liabilities and whether any related assets may June 30, 2021, no
Catastrophe [Policy Text Block]	February In February 2021, one February 15, 2021, 3 3" February 16, 2021 February 19, 2021, February 19, 2021, In addition, the Company recorded a provision for approximately $3.0 million for receivables related to imbalance charges from the grid operator in respect of its demand response operation as it estimated it is probable it may first 2021. The Company has filed billing disputes with ERCOT related to some of the imbalance charges and revenue allocated to its Demand Response services and customers, the outcome of which may
Exploratory Drilling Costs Capitalization and Impairment, Policy [Policy Text Block]	Write-offs of unsuccessful exploration activities There were no write-offs of unsuccessful exploration activities for the three six June 30, 2021 2020.
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 as reported on the balance sheet to the total of the same amounts shown on the statement of cash flows: June 30, December 31, June 30, 2021 2020 2020 (Dollars in thousands) Cash and cash equivalents $ 250,009 $ 448,252 $ 173,718 Restricted cash and cash equivalents 79,868 88,526 76,116 Total Cash and cash equivalents and restricted cash and cash equivalents $ 329,877 $ 536,778 $ 249,834
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, marketable securities 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 June 30, 2021 December 31, 2020, ten $250,000 June 30, 2021 December 31, 2020, At June 30, 2021 December 31, 2020, June 30, 2021 December 31, 2020, 10% The Company's revenues from its primary customers as a percentage of total revenues are as follows: Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 Sierra Pacific Power Company and Nevada Power Company 19.5 % 17.2 % 20.3 % 18.3 % Southern California Public Power Authority (“SCPPA”) 25.5 20.3 25.2 19.5 Kenya Power and Lighting Co. Ltd. ("KPLC") 17.3 16.0 16.4 15.7 The Company has historically been able to collect on substantially all of its receivable balances. As of June 30, 2021, July 2021. first second 2021 In Honduras, as of June 30, 2021, none July 2021. 19 may The Company may 19 See Note 4
Receivables, Trade and Other Accounts Receivable, Allowance for Doubtful Accounts, Policy [Policy Text Block]	Allowance for credit losses The Company performs an analysis of potential credit losses related to its financial instruments that are within the scope of ASU 2018 19, 325, may 19 19 not The following table describes the changes in the allowance for expected credit losses for the three six June 30, 2021 2020 Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 (Dollars in thousands) (Dollars in thousands) Beginning balance of the allowance for expected credit losses $ 597 $ 779 $ 597 $ 755 Change in the provision for expected credit losses for the period (178 ) — (178 ) 24 Ending balance of the allowance for expected credit losses $ 419 $ 779 $ 419 $ 779
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 the Company's Product segment reflect payments received in advance of the satisfaction of performance under the contract. The Company receives payments from customers based on the terms established in the contracts. Total contract assets and contract liabilities as of June 30, 2021 December 31, 2020 June 30, December 31, 2021 2020 (Dollars in thousands) Contract assets (*) $ 13,837 $ 24,544 Contract liabilities (*) $ (13,452 ) $ (11,179 ) (*) 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 condensed consolidated balance sheets. The contract liabilities balance at the beginning of the year was not six June 30, 2021 not On June 30, 2021, not Disaggregated revenues from contracts with customers for the three six June 30, 2021 2020 9
Lessor, Leases [Policy Text Block]	Leases in which the Company is a lessor The table below presents lease income recognized as a lessor: Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 (Dollars in thousands) (Dollars in thousands) Lease income relating to lease payments from operating leases $ 113,113 $ 113,083 $ 238,860 $ 239,159
Marketable Securities, Policy [Policy Text Block]	Marketable securities The Company’s investments in marketable securities consist of debt securities with maturity of up to one three
Derivatives, Policy [Policy Text Block]	Derivative instruments Derivative instruments (including certain derivative instruments embedded in other contracts) are measured at their fair value and recorded as either assets or liabilities unless exempted from derivative treatment as a normal purchase and sale. Changes in the fair value of derivatives not The Company maintains a risk management strategy that may

Note 1 - General and Basis of_2

Note 1 - General and Basis of Presentation (Tables)	6 Months Ended
	Jun. 30, 2021
Notes Tables
Schedule of Cash and Cash Equivalents [Table Text Block]	June 30, December 31, June 30, 2021 2020 2020 (Dollars in thousands) Cash and cash equivalents $ 250,009 $ 448,252 $ 173,718 Restricted cash and cash equivalents 79,868 88,526 76,116 Total Cash and cash equivalents and restricted cash and cash equivalents $ 329,877 $ 536,778 $ 249,834
Schedules of Concentration of Risk, by Risk Factor [Table Text Block]	Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 Sierra Pacific Power Company and Nevada Power Company 19.5 % 17.2 % 20.3 % 18.3 % Southern California Public Power Authority (“SCPPA”) 25.5 20.3 25.2 19.5 Kenya Power and Lighting Co. Ltd. ("KPLC") 17.3 16.0 16.4 15.7
Accounts Receivable, Allowance for Credit Loss [Table Text Block]	Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 (Dollars in thousands) (Dollars in thousands) Beginning balance of the allowance for expected credit losses $ 597 $ 779 $ 597 $ 755 Change in the provision for expected credit losses for the period (178 ) — (178 ) 24 Ending balance of the allowance for expected credit losses $ 419 $ 779 $ 419 $ 779
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]	June 30, December 31, 2021 2020 (Dollars in thousands) Contract assets (*) $ 13,837 $ 24,544 Contract liabilities (*) $ (13,452 ) $ (11,179 )
Operating Lease, Lease Income [Table Text Block]	Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 (Dollars in thousands) (Dollars in thousands) Lease income relating to lease payments from operating leases $ 113,113 $ 113,083 $ 238,860 $ 239,159

Note 3 - Inventories (Tables)

Note 3 - Inventories (Tables)	6 Months Ended
	Jun. 30, 2021
Notes Tables
Schedule of Inventory, Current [Table Text Block]	June 30, December 31, 2021 2020 (Dollars in thousands) Raw materials and purchased parts for assembly $ 11,097 $ 14,835 Self-manufactured assembly parts and finished products 17,429 20,486 Total inventories $ 28,526 $ 35,321

Note 4 - Marketable Securities

Note 4 - Marketable Securities (Tables)	6 Months Ended
	Jun. 30, 2021
Notes Tables
Debt Securities, Available-for-sale [Table Text Block]	June 30, 2021 Amortized cost Gross unrealized gains Gross unrealized losses Fair value (Dollars in thousands) Debt security type: Corporate bonds $ 30,472 $ — $ (10 ) $ 30,707 Commercial paper 11,465 — — 11,465 Money market funds 17,053 — — 17,053 Foreign issuers 2,841 — (1 ) 2,849 Municipal bonds 920 — — 938 Total debt securities available for sale $ 62,751 $ — $ (11 ) $ 63,012
Investments Classified by Contractual Maturity Date [Table Text Block]	June 30, 2021 Less than 12 months Greater than 12 months Fair value Gross unrealized loss Fair value Gross unrealized loss (Dollars in thousands) Debt security type: Corporate bonds $ 30,707 $ (10 ) $ — $ — Commercial paper 11,465 — — — Money market funds 17,053 — — — Foreign issuers 2,849 (1 ) — — Municipal bonds 938 — — — Total debt securities available for sale $ 63,012 $ (11 ) $ — $ —

Note 5 - Fair Value of Financ_2

Note 5 - Fair Value of Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2021
Notes Tables
Fair Value, by Balance Sheet Grouping [Table Text Block]	June 30, 2021 Fair Value Carrying Value at June 30, 2021 Total Level 1 Level 2 Level 3 (Dollars in thousands) Assets: Current assets: Cash equivalents (including restricted cash accounts) $ 30,410 $ 30,410 $ 30,410 $ — $ — Marketable securities (including cash equivalents) 63,012 63,012 63,012 — — Derivatives: Currency forward contracts (2) 458 458 — 458 — Long-term Assets: Cross currency swap (3) 19,316 19,316 — 19,316 — Liabilities: Current liabilities: Derivatives: Cross currency swap (3) (562 ) (562 ) — (562 ) — Long term liabilities: Contingent payables (1) (2,550 ) (2,550 ) — — (2,550 ) $ 110,084 $ 110,084 $ 93,422 $ 19,212 $ (2,550 ) December 31, 2020 Fair Value Carrying Value at December 31, 2020 Total Level 1 Level 2 Level 3 (Dollars in thousands) Assets Current assets: Cash equivalents (including restricted cash accounts) $ 28,653 $ 28,653 $ 28,653 $ — $ — Derivatives: Contingent receivables (1) 111 111 — — 111 Currency forward contracts (2) 1,554 1,554 — 1,554 — Long-term assets: Cross currency swap (3) 27,829 27,829 — 27,829 — Liabilities: Current liabilities: Derivatives: Contingent payables (1) (549 ) (549 ) — — (549 ) Cross currency swap (3) (2,283 ) (2,283 ) — (2,283 ) — Long-term liabilities: Contingent payables (1) (2,630 ) (2,630 ) — — (2,630 ) $ 52,685 $ 52,685 $ 28,653 $ 27,100 $ (3,068 )
Derivative Instruments, Gain (Loss) [Table Text Block]	Amount of recognized gain (loss) Amount of recognized gain (loss) Derivatives not designated as hedging instruments Location of recognized gain (loss) Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 (Dollars in thousands) (Dollars in thousands) Swap transaction on RRS prices (1) Derivative and foreign currency transaction gains (losses) $ — $ — (14,540 ) — Currency forward contracts (1) Derivative and foreign currency transaction gains (losses) $ 1,200 $ 1,435 $ (269 ) $ 2,525 Derivatives designated as cash flow hedging instruments Cross currency swap (2) Derivative and foreign currency transaction gains (losses) $ 6,808 $ — $ (4,294 ) $ —
Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block]	Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 (Dollars in thousands) (Dollars in thousands) Cross currency swap cash flow hedge: Balance in Other comprehensive income (loss) beginning of period $ 568 $ — $ 3,366 $ — Gain or (loss) recognized in Other comprehensive income (loss) 7,006 — (6,894 ) — Amount reclassified from Other comprehensive income (loss) into earnings (6,808 ) — 4,294 — Balance in Other comprehensive income (loss) end of period $ 766 $ — $ 766 $ —
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block]	Fair Value Carrying Amount June 30, 2021 December 31, 2020 June 30, 2021 December 31, 2020 (Dollars in millions) (Dollars in millions) Olkaria III Loan - DFC $ 179.3 $ 192.5 $ 165.7 $ 174.7 Olkaria III plant 4 Loan - DEG 2 37.8 40.4 35.0 37.5 Olkaria III plant 1 Loan - DEG 3 33.3 35.8 30.6 32.8 Platanares Loan - DFC 104.6 112.1 92.2 96.3 Amatitlan Loan 21.7 23.5 21.0 22.8 Senior Secured Notes: OFC 2 LLC ("OFC 2") 193.4 207.9 179.8 188.2 Don A. Campbell 1 ("DAC 1") 72.9 78.5 70.0 73.1 USG Prudential - NV 29.8 31.8 27.1 27.6 USG Prudential - ID 17.4 18.3 17.6 18.4 USG DOE 42.0 45.1 36.8 38.2 Senior Unsecured Bonds 570.4 585.1 524.8 529.1 Senior Unsecured Loan 216.5 222.2 200.0 200.0 Plumstriker 16.6 18.1 16.5 18.1 Other long-term debt 15.7 17.4 16.0 17.6
Fair Value, Liabilities Measured on Recurring and Nonrecurring Basis [Table Text Block]	Level 1 Level 2 Level 3 Total (Dollars in millions) Olkaria III - DFC $ — $ — $ 179.3 $ 179.3 Olkaria III plant 4 Loan - DEG 2 — — 37.8 37.8 Olkaria III plant 1 Loan - DEG 3 — — 33.3 33.3 Platanares Loan - DFC — — 104.6 104.6 Amatitlan Loan — 21.7 — 21.7 Senior Secured Notes: OFC 2 Senior Secured Notes — — 193.4 193.4 DAC 1 Senior Secured Notes — — 72.9 72.9 USG Prudential - NV — — 29.8 29.8 USG Prudential - ID — — 17.4 17.4 USG DOE — — 42.0 42.0 Senior Unsecured Bonds — — 570.4 570.4 Senior Unsecured Loan — — 216.5 216.5 Plumstriker — 16.6 — 16.6 Other long-term debt — — 15.7 15.7 Deposits 14.2 — — 14.2 Level 1 Level 2 Level 3 Total (Dollars in millions) Olkaria III Loan - DFC $ — $ — $ 192.5 $ 192.5 Olkaria IV - DEG 2 — — 40.4 40.4 Olkaria IV - DEG 3 — — 35.8 35.8 Platanares Loan - DFC — — 112.1 112.1 Amatitlan Loan — 23.5 — 23.5 Senior Secured Notes: OFC 2 Senior Secured Notes — — 207.9 207.9 DAC 1 Senior Secured Notes — — 78.5 78.5 USG Prudential - NV — — 31.8 31.8 USG Prudential - ID — — 18.3 18.3 USG DOE — — 45.1 45.1 Senior Unsecured Bonds — — 585.1 585.1 Senior Unsecured Loan — — 222.2 222.2 Plumstriker — 18.1 — 18.1 Other long-term debt — — 17.4 17.4 Deposits 14.8 — — 14.8

Note 7 - Interest Expense, Net

Note 7 - Interest Expense, Net (Tables)	6 Months Ended
	Jun. 30, 2021
Notes Tables
Schedule of Other Nonoperating Expense, by Component [Table Text Block]	Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 (Dollars in thousands) (Dollars in thousands) Interest related to sale of tax benefits $ 2,545 $ 2,500 $ 4,938 $ 4,824 Interest expense 19,646 19,634 39,320 36,800 Less — amount capitalized (3,565 ) (2,349 ) (6,616 ) (4,566 ) Total interest expense, net $ 18,626 $ 19,785 $ 37,642 $ 37,058

Note 8 - Earnings Per Share (Ta

Note 8 - Earnings Per Share (Tables)	6 Months Ended
	Jun. 30, 2021
Notes Tables
Schedule of Weighted Average Number of Shares [Table Text Block]	Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 Weighted average number of shares used in computation of basic earnings per share: 55,992 51,043 55,990 51,040 Additional shares from the assumed exercise of employee stock awards 324 319 512 408 Weighted average number of shares used in computation of diluted earnings per share 56,316 51,362 56,502 51,448

Note 9 - Business Segments (Tab

Note 9 - Business Segments (Tables)	6 Months Ended
	Jun. 30, 2021
Notes Tables
Schedule of Segment Reporting Information, by Segment [Table Text Block]	Electricity Product Energy Storage Consolidated (Dollars in thousands) Three Months Ended June 30, 2021: Revenues from external customers: United States (1) $ 87,564 $ 647 $ 5,627 $ 93,838 Foreign (2) 46,300 6,763 — 53,063 Net revenue from external customers 133,864 7,410 5,627 146,901 Intersegment revenues (4) — 51,038 — — Operating income (loss) 30,018 (427 ) (972 ) 28,619 Segment assets at period end (3) (*) 3,530,256 122,868 165,426 3,818,550 * Including unconsolidated investments 103,890 — — 103,890 Three Months Ended June 30, 2020: Revenues from external customers: United States (1) $ 80,427 $ 2,269 $ 2,514 $ 85,210 Foreign (2) 48,258 41,432 — 89,690 Net revenue from external customers 128,685 43,701 2,514 174,900 Intersegment revenues (4) — 50,453 — — Operating income (loss) 45,875 3,803 (1,603 ) 48,075 Segment assets at period end (3) (*) 3,150,770 190,474 77,133 3,418,377 * Including unconsolidated investments 84,414 — — 84,414 Six Months Ended June 30, 2021: Revenues from external customers: United States (1) $ 186,540 $ 2,500 $ 18,348 $ 207,388 Foreign (2) 92,312 13,553 — 105,865 Net revenue from external customers 278,852 16,053 18,348 313,253 Intersegment revenues (4) — 76,372 — — Operating income (loss) 77,767 (1,638 ) 2,379 78,508 Segment assets at period end (3) (*) 3,530,256 122,868 165,426 3,818,550 * Including unconsolidated investments 103,890 — — 103,890 Six Months Ended June 30, 2020: Revenues from external customers: United States (1) $ 172,119 $ 2,667 $ 4,360 $ 179,146 Foreign (2) 99,422 88,445 — 187,867 Net revenue from external customers 271,541 91,112 4,360 367,013 Intersegment revenues (4) — 59,109 — — Operating income (loss) 104,505 7,675 (3,048 ) 109,132 Segment assets at period end (3) (*) 3,150,770 190,474 77,133 3,418,377 * Including unconsolidated investments 84,414 — — 84,414
Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block]	Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 (Dollars in thousands) (Dollars in thousands) Revenues: Total segment revenues $ 146,901 $ 174,900 $ 313,253 $ 367,013 Intersegment revenues 51,038 50,453 76,372 59,109 Elimination of intersegment revenues (51,038 ) (50,453 ) (76,372 ) (59,109 ) Total consolidated revenues $ 146,901 $ 174,900 $ 313,253 $ 367,013 Operating income: Operating income $ 28,619 $ 48,075 $ 78,508 $ 109,132 Interest income 808 441 1,071 843 Interest expense, net (18,626 ) (19,785 ) (37,642 ) (37,058 ) Derivatives and foreign currency transaction gains (losses) 658 671 (16,208 ) 1,064 Income attributable to sale of tax benefits 7,420 5,672 13,775 9,804 Other non-operating income (expense), net (21 ) 304 (352 ) 382 Total consolidated income before income taxes and equity in income of investees $ 18,858 $ 35,378 $ 39,152 $ 84,167

Note 1 - General and Basis of_3

Note 1 - General and Basis of Presentation 1 (Details Textual) - USD ($) $ in Thousands	1 Months Ended		3 Months Ended		6 Months Ended		12 Months Ended	18 Months Ended
	Jul. 31, 2021	Feb. 28, 2021	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020	Jun. 30, 2021
Proceeds from Issuance of Long-term Debt, Total							$ 419,300
Proceeds from Issuance of Common Stock							339,500
Loss from Catastrophes		$ 9,100
Exploration Abandonment and Impairment Expense			$ 0	$ 0	$ 0	$ 0
Cash, FDIC Insured Amount			22,800		22,800		18,900	$ 22,800
Cash, Uninsured Amount			64,300		64,300		72,400	64,300
Accounts Receivable, after Allowance for Credit Loss, Current, Total			137,688		137,688		$ 149,170	137,688
Product [Member]
Revenue, Remaining Performance Obligation, Amount			58,600		58,600			58,600
Kenya Power and Lighting Co LTD [Member]
Accounts Receivable, Past Due			$ 43,500		$ 43,500			$ 43,500
Accounts Receivable, Past Due, Average Number of Days Overdue (Day)			77 days 4 hours		77 days 4 hours			77 days 4 hours
ENNE [Member]
Accounts Receivable, Past Due			$ 7,400		$ 7,400			$ 7,400
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Primary Customers [Member]
Concentration Risk, Percentage							65.00%	60.00%
Non-US [Member]
Accounts Receivable, after Allowance for Credit Loss, Current, Total			$ 104,500		104,500		$ 111,300	$ 104,500
General and Administrative Expense [Member]
Accounts Receivable, Credit Loss Expense (Reversal)					$ 3,000
Subsequent Event [Member] | Kenya Power and Lighting Co LTD [Member]
Proceeds from (Repayments of) Accounts Receivable Securitization, Total	$ 13,200
Subsequent Event [Member] | ENNE [Member]
Proceeds from (Repayments of) Accounts Receivable Securitization, Total	0
Corporate Debt Facilities [Member] | Subsequent Event [Member]
Debt Instrument, Face Amount	$ 175,000

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]: 2021-07-01	Jun. 30, 2021
Revenue, Remaining Performance Obligation, Percentage	100.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period (Month)	24 months

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	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020	Dec. 31, 2019
Cash and cash equivalents	$ 250,009	$ 448,252	$ 173,718
Restricted cash and cash equivalents	79,868	88,526	76,116
Total Cash and cash equivalents and restricted cash and cash equivalents	$ 329,877	$ 536,778	$ 249,834	$ 153,110

Note 1 - General and Basis of_6

Note 1 - General and Basis of Presentation - Customers as a Percentage of Total Revenues (Details) - Revenue Benchmark [Member] - Customer Concentration Risk [Member]	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Sierra Pacific Power Company And Nevada Power Company [Member]
Percent of revenues	19.50%	17.20%	20.30%	18.30%
Southern California Public Power Authority [Member]
Percent of revenues	25.50%	20.30%	25.20%	19.50%
Kenya Power and Lighting Co LTD [Member]
Percent of revenues	17.30%	16.00%	16.40%	15.70%

Note 1 - General and Basis of_7

Note 1 - General and Basis of Presentation - Changes in the Allowance for Expected Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Beginning balance of the allowance for expected credit losses			$ 597
Ending balance of the allowance for expected credit losses	$ 419		419
Accounting Standards Update 2016-13 [Member]
Beginning balance of the allowance for expected credit losses	597	$ 779	597	$ 755
Change in the provision for expected credit losses for the period	(178)	0	(178)	24
Ending balance of the allowance for expected credit losses	$ 419	$ 779	$ 419	$ 779

Note 1 - General and Basis of_8

Note 1 - General and Basis of Presentation - Contract Assets (Liabilities) (Details) - USD ($) $ in Thousands		Jun. 30, 2021	Dec. 31, 2020
Contract assets (*)	[1]	$ 13,837	$ 24,544
Contract liabilities (*)	[1]	$ (13,452)	$ (11,179)
[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 condensed consolidated balance sheets. The contract liabilities balance at the beginning of the year was not yet recognized as product revenues during the six months ended June 30, 2021 as a result of performance obligations having not been satisfied yet.

Note 1 - General and Basis of_9

Note 1 - General and Basis of Presentation - Lease Income as Lessor (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Lease income relating to lease payments from operating leases	$ 113,113	$ 113,083	$ 238,860	$ 239,159

Note 3 - Inventories - Inventor

Note 3 - Inventories - Inventories, Current (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Raw materials and purchased parts for assembly	$ 11,097	$ 14,835
Self-manufactured assembly parts and finished products	17,429	20,486
Total inventories	$ 28,526	$ 35,321

Note 4 - Marketable Securitie_2

Note 4 - Marketable Securities (Details Textual) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Debt Securities, Available-for-sale, Total	$ 45,960		$ 0
Proceeds from Sale of Debt Securities, Available-for-sale	0	$ 0
Cash and Cash Equivalents [Member]
Debt Securities, Available-for-sale, Total	$ 17,100

Note 4 - Marketable Securitie_3

Note 4 - Marketable Securities - Investment in Marketable Securities (Details) $ in Thousands	Jun. 30, 2021USD ($)
Amortized cost	$ 62,751
Gross unrealized gains	0
Gross unrealized losses	(11)
Fair value	63,012
Corporate Debt Securities [Member]
Amortized cost	30,472
Gross unrealized gains	0
Gross unrealized losses	(10)
Fair value	30,707
Commercial Paper [Member]
Amortized cost	11,465
Gross unrealized gains	0
Gross unrealized losses	0
Fair value	11,465
Money Market Funds [Member]
Amortized cost	17,053
Gross unrealized gains	0
Gross unrealized losses	0
Fair value	17,053
Debt Security, Corporate, Non-US [Member]
Amortized cost	2,841
Gross unrealized gains	0
Gross unrealized losses	(1)
Fair value	2,849
Municipal Bonds [Member]
Amortized cost	920
Gross unrealized gains	0
Gross unrealized losses	0
Fair value	$ 938

Note 4 - Marketable Securitie_4

Note 4 - Marketable Securities - Fair Value and Gross Unrealized Losses (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Fair value	$ 45,960	$ 0
Gross unrealized losses	(11)
Maturity, Less Than 12 Months [Member]
Fair value	63,012
Gross unrealized losses	(11)
Maturity, Greater Than 12 Months [Member]
Fair value	0
Gross unrealized losses	0
Corporate Debt Securities [Member]
Gross unrealized losses	(10)
Corporate Debt Securities [Member] | Maturity, Less Than 12 Months [Member]
Fair value	30,707
Gross unrealized losses	(10)
Corporate Debt Securities [Member] | Maturity, Greater Than 12 Months [Member]
Fair value	0
Gross unrealized losses	0
Commercial Paper [Member]
Gross unrealized losses	0
Commercial Paper [Member] | Maturity, Less Than 12 Months [Member]
Fair value	11,465
Gross unrealized losses	0
Commercial Paper [Member] | Maturity, Greater Than 12 Months [Member]
Fair value	0
Gross unrealized losses	0
Money Market Funds [Member]
Gross unrealized losses	0
Money Market Funds [Member] | Maturity, Less Than 12 Months [Member]
Fair value	17,053
Gross unrealized losses	0
Money Market Funds [Member] | Maturity, Greater Than 12 Months [Member]
Fair value	0
Gross unrealized losses	0
Debt Security, Corporate, Non-US [Member]
Gross unrealized losses	(1)
Debt Security, Corporate, Non-US [Member] | Maturity, Less Than 12 Months [Member]
Fair value	2,849
Gross unrealized losses	(1)
Debt Security, Corporate, Non-US [Member] | Maturity, Greater Than 12 Months [Member]
Fair value	0
Gross unrealized losses	0
Municipal Bonds [Member]
Gross unrealized losses	0
Municipal Bonds [Member] | Maturity, Less Than 12 Months [Member]
Fair value	938
Gross unrealized losses	0
Municipal Bonds [Member] | Maturity, Greater Than 12 Months [Member]
Fair value	0
Gross unrealized losses	$ 0

Note 5 - Fair Value of Financ_3

Note 5 - Fair Value of Financial Instruments (Details Textual) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Cross Currency Interest Rate Contract [Member] | Deposits and Other and Accounts Payable and Accrued Expenses [Member]
Derivatives, Cash Collateral Deposits	$ 0	$ 0

Note 5 - Fair Value of Financ_4

Note 5 - Fair Value of Financial Instruments - Financial Assets and Liabilities at Fair Value (Details) - USD ($) $ in Thousands		Jun. 30, 2021		Dec. 31, 2020
Debt Securities, Available-for-sale, Total		$ 45,960		$ 0
Reported Value Measurement [Member]
Cash equivalents (including restricted cash accounts)		30,410		28,653
Debt Securities, Available-for-sale, Total		63,012
Fair Value, Net Asset (Liability), Total		110,084		52,685
Reported Value Measurement [Member] | Contingent Receivable [Member]
Derivative Asset, Current	[1]			111
Reported Value Measurement [Member] | Currency Forward Contracts [Member]
Derivatives, current	[2]	458
Derivative Asset, Current	[2]			1,554
Reported Value Measurement [Member] | Cross Currency Interest Rate Contract [Member]
Derivatives, current		(562)	[2]	(2,283)	[3]
Derivative Asset, Noncurrent	[3]	19,316		27,829
Reported Value Measurement [Member] | Contingent Payable [Member]
Derivatives, current	[1]			(549)
Derivatives, noncurrent	[1]	(2,550)		(2,630)
Estimate of Fair Value Measurement [Member]
Cash equivalents (including restricted cash accounts)		30,410		28,653
Debt Securities, Available-for-sale, Total		63,012
Fair Value, Net Asset (Liability), Total		110,084		52,685
Estimate of Fair Value Measurement [Member] | Contingent Receivable [Member]
Derivative Asset, Current	[1]			111
Estimate of Fair Value Measurement [Member] | Currency Forward Contracts [Member]
Derivatives, current	[2]	458
Derivative Asset, Current	[2]			1,554
Estimate of Fair Value Measurement [Member] | Cross Currency Interest Rate Contract [Member]
Derivatives, current		(562)	[2]	(2,283)	[3]
Derivative Asset, Noncurrent	[3]	19,316		27,829
Estimate of Fair Value Measurement [Member] | Contingent Payable [Member]
Derivatives, current	[1]			(549)
Derivatives, noncurrent	[1]	(2,550)		(2,630)
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Cash equivalents (including restricted cash accounts)		30,410		28,653
Debt Securities, Available-for-sale, Total		63,012
Fair Value, Net Asset (Liability), Total		93,422		28,653
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] | Contingent Receivable [Member]
Derivative Asset, Current	[1]			0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] | Currency Forward Contracts [Member]
Derivatives, current	[2]	0
Derivative Asset, Current	[2]			0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] | Cross Currency Interest Rate Contract [Member]
Derivatives, current		0	[2]	0	[3]
Derivative Asset, Noncurrent	[3]	0		0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] | Contingent Payable [Member]
Derivatives, current	[1]			0
Derivatives, noncurrent	[1]	0		0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Cash equivalents (including restricted cash accounts)		0		0
Debt Securities, Available-for-sale, Total		0
Fair Value, Net Asset (Liability), Total		19,212		27,100
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Contingent Receivable [Member]
Derivative Asset, Current	[1]			0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Currency Forward Contracts [Member]
Derivatives, current	[2]	458
Derivative Asset, Current	[2]			1,554
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Cross Currency Interest Rate Contract [Member]
Derivatives, current		(562)	[2]	(2,283)	[3]
Derivative Asset, Noncurrent	[3]	19,316		27,829
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Contingent Payable [Member]
Derivatives, current	[1]			0
Derivatives, noncurrent	[1]	0		0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]
Cash equivalents (including restricted cash accounts)		0		0
Debt Securities, Available-for-sale, Total		0
Fair Value, Net Asset (Liability), Total		(2,550)		(3,068)
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] | Contingent Receivable [Member]
Derivative Asset, Current	[1]			111
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] | Currency Forward Contracts [Member]
Derivatives, current	[2]	0
Derivative Asset, Current	[2]			0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] | Cross Currency Interest Rate Contract [Member]
Derivatives, current		0	[2]	0	[3]
Derivative Asset, Noncurrent	[3]	0		0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] | Contingent Payable [Member]
Derivatives, current	[1]			(549)
Derivatives, noncurrent	[1]	$ (2,550)		$ (2,630)
[1]	These amounts relate to contingent receivables and payables and warrants pertaining to the Guadeloupe power plant purchase transaction, 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 June 30, 2021 and December 31, 2020, as applicable, in the condensed consolidated balance sheets with the corresponding gain or loss being recognized within "Derivatives and foreign currency transaction gains (losses)" in the condensed consolidated statements 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 "Receivables, other" on June 30, 2021 and December 31, 2020, in the condensed consolidated balance sheets with the corresponding gain or loss being recognized within "Derivatives and foreign currency transaction gains (losses)" in the condensed consolidated statements of operations and comprehensive income.
[3]	These amounts relate to cross currency swap contracts valued primarily based on the present value of the cross currency swap future settlement prices for U.S. Dollar ("USD") and New Israeli Shekel ("NIS") zero yield curves and the applicable exchange rate as of June 30, 2021 and December 31, 2020, as applicable. These amounts are included within "Deposits and other" and "Accounts payable and accrued expenses", as applicable, on June 30, 2021 and December 31, 2020 in the condensed consolidated balance sheets. There are no cash collateral deposits on June 30, 2021 and December 31, 2020.

Note 5 - Fair Value of Financ_5

Note 5 - Fair Value of Financial Instruments - Amounts of Gain (Loss) Recognized in Condensed Consolidated Statements on Derivative Instruments Not Designated as Hedges (Details) - Foreign Currency Gain (Loss) [Member] - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Swap Transaction on RRS Prices [Member]
Amount of gain (loss) recognized	[1]	$ 0	$ 0	$ (14,540)	$ 0
Currency Forward Contracts [Member]
Amount of gain (loss) recognized	[1]	1,200	1,435	(269)	2,525
Cross Currency Interest Rate Contract [Member]
Amount of gain (loss) recognized	[2]	$ 6,808	$ 0	$ (4,294)	$ 0
[1]	The foregoing currency forward and price swap transactions were not designated as hedge transactions and were marked to market with the corresponding gains or losses recognized within "Derivatives and foreign currency transaction gains (losses)" in the condensed consolidated statements of operations and comprehensive income. The price swap transaction was related to a hedging agreement with a third party that was effective January 1, 2021 under which the Company fixed the price per MWh on a portion of RRS provided by its Rabbit Hill storage facility, as described under Note 1 to the condensed consolidated financial statements. The price swap transaction was terminated effective April 1, 2021.
[2]	The foregoing cross currency swap transactions were designated as a cash flow hedge as further described under note 1 to the condensed consolidated financial statements. The changes in the cross currency swap fair value are initially recorded in "Other comprehensive income (loss)" and a corresponding amount is reclassified out of "Accumulated other comprehensive income (loss)" to "Derivatives and foreign currency transaction gains (losses)" to offset the remeasurement of the underlying hedged transaction which also impacts the same line item in the condensed consolidated statements of operations and comprehensive income.

Note 5 - Fair Value of Financ_6

Note 5 - Fair Value of Financial Instruments - Effect of Cash Flow Hedge on Statement of Operations and Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Balance in Other comprehensive income (loss) beginning of period	$ 1,949,879	$ 1,533,651	$ 1,941,437	$ 1,515,410
Balance in Other comprehensive income (loss) end of period	1,959,855	1,556,811	1,959,855	1,556,811
Cross Currency Swap [Member] | Designated as Hedging Instrument [Member] | Accumulated Gain (Loss), Cash Flow Hedge, Including Noncontrolling Interest [Member]
Balance in Other comprehensive income (loss) beginning of period	568	0	3,366	0
Gain or (loss) recognized in Other comprehensive income (loss)	7,006	0	(6,894)	0
Amount reclassified from Other comprehensive income (loss) into earnings	(6,808)	0	4,294	0
Balance in Other comprehensive income (loss) end of period	$ 766	$ 0	$ 766	$ 0

Note 5 - Fair Value of Financ_7

Note 5 - Fair Value of Financial Instruments - Fair Value of Long-term Debt Approximates Its Carrying Amount, Exceptions (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Olkaria III OPIC [Member]
Loans	$ 179.3	$ 192.5
Olkaria III Plant 4 Loan - DEG 2 [Member]
Loans	37.8
Olkaria III plant 1 Loan - DEG 3 [Member]
Loans	33.3
Platanares Loan - OPIC [Member]
Loans	104.6	112.1
Amatitlan Loan [Member]
Loans	21.7	23.5
Don A. Campbell 1 ("DAC1") [Member]
Notes	72.9	78.5
USG Prudential - NV [Member]
Notes	29.8	31.8
USG Prudential - ID [Member]
Notes	17.4	18.3
USG DOE [Member]
Notes	42	45.1
Senior Unsecured Bonds [Member]
Senior Unsecured debt	570.4	585.1
Senior Unsecured Loan [Member]
Senior Unsecured debt	216.5	222.2
Plumstriker Loan Agreement [Member]
Loans	16.6	18.1
Estimate of Fair Value Measurement [Member]
Other long-term debt	15.7	17.4
Estimate of Fair Value Measurement [Member] | Olkaria III OPIC [Member]
Loans	179.3	192.5
Estimate of Fair Value Measurement [Member] | Olkaria III Plant 4 Loan - DEG 2 [Member]
Loans	37.8	40.4
Estimate of Fair Value Measurement [Member] | Olkaria III plant 1 Loan - DEG 3 [Member]
Loans	33.3	35.8
Estimate of Fair Value Measurement [Member] | Platanares Loan - OPIC [Member]
Loans	104.6	112.1
Estimate of Fair Value Measurement [Member] | Amatitlan Loan [Member]
Loans	21.7	23.5
Estimate of Fair Value Measurement [Member] | OFC Two Senior Secured Notes [Member]
Notes	193.4	207.9
Estimate of Fair Value Measurement [Member] | Don A. Campbell 1 ("DAC1") [Member]
Notes	72.9	78.5
Estimate of Fair Value Measurement [Member] | USG Prudential - NV [Member]
Notes	29.8	31.8
Estimate of Fair Value Measurement [Member] | USG Prudential - ID [Member]
Notes	17.4	18.3
Estimate of Fair Value Measurement [Member] | USG DOE [Member]
Notes	42	45.1
Estimate of Fair Value Measurement [Member] | Senior Unsecured Bonds [Member]
Senior Unsecured debt	570.4	585.1
Estimate of Fair Value Measurement [Member] | Senior Unsecured Loan [Member]
Senior Unsecured debt	216.5	222.2
Estimate of Fair Value Measurement [Member] | Plumstriker Loan Agreement [Member]
Loans	16.6	18.1
Reported Value Measurement [Member]
Other long-term debt	16	17.6
Reported Value Measurement [Member] | Olkaria III OPIC [Member]
Loans	165.7	174.7
Reported Value Measurement [Member] | Olkaria III Plant 4 Loan - DEG 2 [Member]
Loans	35	37.5
Reported Value Measurement [Member] | Olkaria III plant 1 Loan - DEG 3 [Member]
Loans	30.6	32.8
Reported Value Measurement [Member] | Platanares Loan - OPIC [Member]
Loans	92.2	96.3
Reported Value Measurement [Member] | Amatitlan Loan [Member]
Loans	21	22.8
Reported Value Measurement [Member] | OFC Two Senior Secured Notes [Member]
Notes	179.8	188.2
Reported Value Measurement [Member] | Don A. Campbell 1 ("DAC1") [Member]
Notes	70	73.1
Reported Value Measurement [Member] | USG Prudential - NV [Member]
Notes	27.1	27.6
Reported Value Measurement [Member] | USG Prudential - ID [Member]
Notes	17.6	18.4
Reported Value Measurement [Member] | USG DOE [Member]
Notes	36.8	38.2
Reported Value Measurement [Member] | Senior Unsecured Bonds [Member]
Senior Unsecured debt	524.8	529.1
Reported Value Measurement [Member] | Senior Unsecured Loan [Member]
Senior Unsecured debt	200	200
Reported Value Measurement [Member] | Plumstriker Loan Agreement [Member]
Loans	$ 16.5	$ 18.1

Note 5 - Fair Value of Financ_8

Note 5 - Fair Value of Financial Instruments - Fair Value of Financial Instruments (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Deposits	$ 14.2	$ 14.8
Olkaria III OPIC [Member]
Loans	179.3	192.5
Olkaria III Plant 4 Loan - DEG 2 [Member]
Loans	37.8
Olkaria IV Loan - DEG 2 [Member]
Loans		40.4
Olkaria III plant 1 Loan - DEG 3 [Member]
Loans	33.3
Olkaria IV Loan - DEG 3 [Member]
Loans		35.8
Platanares Loan - OPIC [Member]
Loans	104.6	112.1
Amatitlan Loan [Member]
Loans	21.7	23.5
OFC Senior Secured Notes [Member]
Notes	193.4	207.9
Don A. Campbell 1 ("DAC1") [Member]
Notes	72.9	78.5
USG Prudential - NV [Member]
Notes	29.8	31.8
USG Prudential - ID [Member]
Notes	17.4	18.3
USG DOE [Member]
Notes	42	45.1
Senior Unsecured Bonds [Member]
Senior Unsecured debt	570.4	585.1
Senior Unsecured Loan [Member]
Senior Unsecured debt	216.5	222.2
Plumstriker Loan Agreement [Member]
Loans	16.6	18.1
Other Long-term Debt [Member]
Senior Unsecured debt	15.7	17.4
Fair Value, Inputs, Level 1 [Member]
Deposits	14.2	14.8
Fair Value, Inputs, Level 1 [Member] | Olkaria III OPIC [Member]
Loans	0	0
Fair Value, Inputs, Level 1 [Member] | Olkaria III Plant 4 Loan - DEG 2 [Member]
Loans	0
Fair Value, Inputs, Level 1 [Member] | Olkaria IV Loan - DEG 2 [Member]
Loans		0
Fair Value, Inputs, Level 1 [Member] | Olkaria III plant 1 Loan - DEG 3 [Member]
Loans	0
Fair Value, Inputs, Level 1 [Member] | Olkaria IV Loan - DEG 3 [Member]
Loans		0
Fair Value, Inputs, Level 1 [Member] | Platanares Loan - OPIC [Member]
Loans	0	0
Fair Value, Inputs, Level 1 [Member] | Amatitlan Loan [Member]
Loans	0	0
Fair Value, Inputs, Level 1 [Member] | OFC Senior Secured Notes [Member]
Notes	0	0
Fair Value, Inputs, Level 1 [Member] | Don A. Campbell 1 ("DAC1") [Member]
Notes	0	0
Fair Value, Inputs, Level 1 [Member] | USG Prudential - NV [Member]
Notes	0	0
Fair Value, Inputs, Level 1 [Member] | USG Prudential - ID [Member]
Notes	0	0
Fair Value, Inputs, Level 1 [Member] | USG DOE [Member]
Notes	0	0
Fair Value, Inputs, Level 1 [Member] | Senior Unsecured Bonds [Member]
Senior Unsecured debt	0	0
Fair Value, Inputs, Level 1 [Member] | Senior Unsecured Loan [Member]
Senior Unsecured debt	0	0
Fair Value, Inputs, Level 1 [Member] | Plumstriker Loan Agreement [Member]
Loans	0	0
Fair Value, Inputs, Level 1 [Member] | Other Long-term Debt [Member]
Senior Unsecured debt	0	0
Fair Value, Inputs, Level 2 [Member]
Deposits	0	0
Fair Value, Inputs, Level 2 [Member] | Olkaria III OPIC [Member]
Loans	0	0
Fair Value, Inputs, Level 2 [Member] | Olkaria III Plant 4 Loan - DEG 2 [Member]
Loans	0
Fair Value, Inputs, Level 2 [Member] | Olkaria IV Loan - DEG 2 [Member]
Loans		0
Fair Value, Inputs, Level 2 [Member] | Olkaria III plant 1 Loan - DEG 3 [Member]
Loans	0
Fair Value, Inputs, Level 2 [Member] | Olkaria IV Loan - DEG 3 [Member]
Loans		0
Fair Value, Inputs, Level 2 [Member] | Platanares Loan - OPIC [Member]
Loans	0	0
Fair Value, Inputs, Level 2 [Member] | Amatitlan Loan [Member]
Loans	21.7	23.5
Fair Value, Inputs, Level 2 [Member] | OFC Senior Secured Notes [Member]
Notes	0	0
Fair Value, Inputs, Level 2 [Member] | Don A. Campbell 1 ("DAC1") [Member]
Notes	0	0
Fair Value, Inputs, Level 2 [Member] | USG Prudential - NV [Member]
Notes	0	0
Fair Value, Inputs, Level 2 [Member] | USG Prudential - ID [Member]
Notes	0	0
Fair Value, Inputs, Level 2 [Member] | USG DOE [Member]
Notes	0	0
Fair Value, Inputs, Level 2 [Member] | Senior Unsecured Bonds [Member]
Senior Unsecured debt	0	0
Fair Value, Inputs, Level 2 [Member] | Senior Unsecured Loan [Member]
Senior Unsecured debt	0	0
Fair Value, Inputs, Level 2 [Member] | Plumstriker Loan Agreement [Member]
Loans	16.6	18.1
Fair Value, Inputs, Level 2 [Member] | Other Long-term Debt [Member]
Senior Unsecured debt	0	0
Fair Value, Inputs, Level 3 [Member]
Deposits	0	0
Fair Value, Inputs, Level 3 [Member] | Olkaria III OPIC [Member]
Loans	179.3	192.5
Fair Value, Inputs, Level 3 [Member] | Olkaria III Plant 4 Loan - DEG 2 [Member]
Loans	37.8
Fair Value, Inputs, Level 3 [Member] | Olkaria IV Loan - DEG 2 [Member]
Loans		40.4
Fair Value, Inputs, Level 3 [Member] | Olkaria III plant 1 Loan - DEG 3 [Member]
Loans	33.3
Fair Value, Inputs, Level 3 [Member] | Olkaria IV Loan - DEG 3 [Member]
Loans		35.8
Fair Value, Inputs, Level 3 [Member] | Platanares Loan - OPIC [Member]
Loans	104.6	112.1
Fair Value, Inputs, Level 3 [Member] | Amatitlan Loan [Member]
Loans	0	0
Fair Value, Inputs, Level 3 [Member] | OFC Senior Secured Notes [Member]
Notes	193.4	207.9
Fair Value, Inputs, Level 3 [Member] | Don A. Campbell 1 ("DAC1") [Member]
Notes	72.9	78.5
Fair Value, Inputs, Level 3 [Member] | USG Prudential - NV [Member]
Notes	29.8	31.8
Fair Value, Inputs, Level 3 [Member] | USG Prudential - ID [Member]
Notes	17.4	18.3
Fair Value, Inputs, Level 3 [Member] | USG DOE [Member]
Notes	42	45.1
Fair Value, Inputs, Level 3 [Member] | Senior Unsecured Bonds [Member]
Senior Unsecured debt	570.4	585.1
Fair Value, Inputs, Level 3 [Member] | Senior Unsecured Loan [Member]
Senior Unsecured debt	216.5	222.2
Fair Value, Inputs, Level 3 [Member] | Plumstriker Loan Agreement [Member]
Loans	0	0
Fair Value, Inputs, Level 3 [Member] | Other Long-term Debt [Member]
Senior Unsecured debt	$ 15.7	$ 17.4

Note 7 - Interest Expense, Ne_2

Note 7 - Interest Expense, Net - Components of Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Interest related to sale of tax benefits	$ 2,545	$ 2,500	$ 4,938	$ 4,824
Interest expense	19,646	19,634	39,320	36,800
Less — amount capitalized	(3,565)	(2,349)	(6,616)	(4,566)
Total interest expense, net	$ 18,626	$ 19,785	$ 37,642	$ 37,058

Note 8 - Earnings Per Share (De

Note 8 - Earnings Per Share (Details Textual) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	174,100	141,300	16,000	132,900

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		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Weighted average number of shares used in computation of basic earnings per share: (in shares)	55,992	51,043	55,990	51,040
Additional shares from the assumed exercise of employee stock awards (in shares)	324	319	512	408
Weighted average number of shares used in computation of diluted earnings per share (in shares)	56,316	51,362	56,502	51,448

Note 9 - Business Segments (Det

Note 9 - Business Segments (Details Textual) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021USD ($)	Jun. 30, 2020USD ($)	Jun. 30, 2021USD ($)	Jun. 30, 2020USD ($)	Dec. 31, 2020USD ($)
Number of Reportable Segments			3
Revenue from Contract with Customer, Including Assessed Tax	$ 146,901	$ 174,900	$ 313,253	$ 367,013
Goodwill, Ending Balance	24,863		24,863		$ 24,566
Electricity Segment [Member]
Revenue from Contract with Customer, Including Assessed Tax	133,864	128,685	278,852	271,541
Goodwill, Ending Balance	20,200	20,100	20,200	20,100
Electricity Segment [Member] | Accounting Standards Update 2014-09 [Member]
Revenue from Contract with Customer, Including Assessed Tax	20,800	15,600	40,000	32,400
Energy Storage and Management Services [Member]
Goodwill, Ending Balance	4,600	0	4,600	0
Product Segment [Member]
Revenue from Contract with Customer, Including Assessed Tax	7,410	43,701	16,053	91,112
Goodwill, Ending Balance	$ 0	$ 0	$ 0	$ 0

Note 9 - Business Segments - Su

Note 9 - Business Segments - Summarized Financial Information Concerning Reportable Segments (Details) - USD ($) $ in Thousands		3 Months Ended				6 Months Ended
		Jun. 30, 2021		Jun. 30, 2020		Jun. 30, 2021		Jun. 30, 2020		Dec. 31, 2020
Revenues		$ 146,901		$ 174,900		$ 313,253		$ 367,013
Operating income (loss)		28,619		48,075		78,508		109,132
Segment assets at period end		3,818,550	[1],[2]	3,418,377	[1],[2]	3,818,550	[1],[2]	3,418,377	[1],[2]	$ 3,888,987
Segment Reconciling Items [Member]
Revenues	[3]	0		0		0		0
Segment assets at period end		103,890		84,414		103,890		84,414
Electricity Segment [Member]
Revenues		133,864		128,685		278,852		271,541
Operating income (loss)		30,018		45,875		77,767		104,505
Segment assets at period end	[1],[2]	3,530,256		3,150,770		3,530,256		3,150,770
Electricity Segment [Member] | Segment Reconciling Items [Member]
Revenues	[3]	0		0		0		0
Segment assets at period end		103,890		84,414		103,890		84,414
Product Segment [Member]
Revenues		7,410		43,701		16,053		91,112
Operating income (loss)		(427)		3,803		(1,638)		7,675
Segment assets at period end	[1],[2]	122,868		190,474		122,868		190,474
Product Segment [Member] | Segment Reconciling Items [Member]
Revenues	[3]	51,038		50,453		76,372		59,109
Segment assets at period end		0		0		0		0
Other Segments [Member]
Revenues		5,627		2,514		18,348		4,360
Operating income (loss)		(972)		(1,603)		2,379		(3,048)
Segment assets at period end	[1],[2]	165,426		77,133		165,426		77,133
Other Segments [Member] | Segment Reconciling Items [Member]
Revenues	[3]	0		0		0		0
Segment assets at period end		0		0		0		0
UNITED STATES
Revenues	[4]	93,838		85,210		207,388		179,146
UNITED STATES | Electricity Segment [Member]
Revenues	[4]	87,564		80,427		186,540		172,119
UNITED STATES | Product Segment [Member]
Revenues	[4]	647		2,269		2,500		2,667
UNITED STATES | Other Segments [Member]
Revenues	[4]	5,627		2,514		18,348		4,360
Non-US [Member]
Revenues	[5]	53,063		89,690		105,865		187,867
Non-US [Member] | Electricity Segment [Member]
Revenues	[5]	46,300		48,258		92,312		99,422
Non-US [Member] | Product Segment [Member]
Revenues	[5]	6,763		41,432		13,553		88,445
Non-US [Member] | Other Segments [Member]
Revenues	[5]	$ 0		$ 0		$ 0		$ 0
[1]	Electricity segment assets include goodwill in the amount of $20.2 million and $20.1 million as of June 30, 2021 and 2020, respectively. Energy Storage segment assets include goodwill in the amount of $4.6 million and none as of June 30, 2021 and 2020, respectively. No goodwill is included in the Product segment assets as of June 30, 2021 and 2020.
[2]	Including unconsolidated investments
[3]	Intersegment revenue are fully eliminated in consolidation.
[4]	Electricity segment revenues in the United States are all accounted under lease accounting except for $20.8 million and $40.0 million for the three and six months ended June 30, 2021, respectively, and $15.6 and $32.4 million for the three and six months ended June 30, 2020 , respectively, that are accounted under ASC 606. Product and Energy Storage segment revenues in the United States are accounted under ASC 606.
[5]	Electricity segment revenues in foreign countries are all accounted under lease accounting. Product segment 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		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenue	$ 146,901	$ 174,900	$ 313,253	$ 367,013
Operating income (loss)	28,619	48,075	78,508	109,132
Interest income	808	441	1,071	843
Interest expense, net	(18,626)	(19,785)	(37,642)	(37,058)
Derivatives and foreign currency transaction gains (losses)	658	671	(16,208)	1,064
Income attributable to sale of tax benefits	7,420	5,672	13,775	9,804
Other non-operating income (expense), net	(21)	304	(352)	382
Total consolidated income before income taxes and equity in income of investees	18,858	35,378	39,152	84,167
Intersegment Eliminations [Member]
Revenue	51,038	50,453	76,372	59,109
Consolidation, Eliminations [Member]
Revenue	$ (51,038)	$ (50,453)	$ (76,372)	$ (59,109)

Note 10 - Commitments and Con_2

Note 10 - Commitments and Contingencies (Details Textual) - USD ($) $ in Millions	Mar. 03, 2021	Mar. 29, 2016
Former Local Sales Representative vs. Ormat [Member] | Pending Litigation [Member]
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 (Year)		10 years
Avishai Shmuel Mano vs. Ormat [Member]
Loss Contingency, Damages Sought, Value	$ 100

Note 11 - Income Taxes (Details

Note 11 - Income Taxes (Details Textual)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Effective Income Tax Rate Reconciliation, Percent, Total	22.60%	33.30%	18.60%	35.50%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			21.00%

Note 12 - Subsequent Events (De

Note 12 - Subsequent Events (Details Textual) $ / shares in Units, $ in Thousands	Aug. 04, 2021USD ($)$ / shares	Jul. 15, 2021USD ($)	Jul. 14, 2021USD ($)	Jul. 12, 2021USD ($)	Jun. 30, 2021USD ($)$ / shares	Mar. 31, 2021USD ($)$ / shares	Jun. 30, 2020USD ($)	Mar. 31, 2020USD ($)
Dividends, Common Stock, Total					$ 6,448	$ 6,718	$ 5,719	$ 5,614
Common Stock, Dividends, Per Share, Declared (in dollars per share) | $ / shares					$ 0.12	$ 0.12
Subsequent Event [Member]
Dividends, Common Stock, Total	$ 6,700
Common Stock, Dividends, Per Share, Declared (in dollars per share) | $ / shares	$ 0.12
Dividends Payable, Date of Record	Aug. 18, 2021
Dividends Payable, Date to be Paid	Sep. 1, 2021
Subsequent Event [Member] | Hapoalim Loan [Member]
Debt Instrument, Face Amount				$ 125,000
Debt Instrument, Periodic Payment, Total				$ 8,900
Debt Instrument, Term (Year)				7 years
Debt Instrument, Interest Rate, Stated Percentage				3.45%
Debt Instrument, Covenant, Minimum Equity Capital, Amount				$ 750,000
Debt Instrument, Covenant, Equity Capital to Total Assets, Percent				0.25
Subsequent Event [Member] | HSBC Loan [Member]
Debt Instrument, Face Amount		$ 50,000
Debt Instrument, Periodic Payment, Total		$ 3,600
Debt Instrument, Term (Year)		7 years
Debt Instrument, Interest Rate, Stated Percentage		3.45%
Debt Instrument, Covenant, Minimum Equity Capital, Amount		$ 750,000
Debt Instrument, Covenant, Equity Capital to Total Assets, Percent		0.25
Subsequent Event [Member] | TG Geothermal Portfolio, LLC [Member]
Payments to Acquire Productive Assets, Total			$ 171,000
Assumption of Productive Assets, Percent Acquired			100.00%
Debt and Lease Obligation, Total			$ 206,000