Ormat (ORA) 10-Q 4 May 22 2022 Q1 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	3 Months Ended
	Mar. 31, 2022	May 01, 2022
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	Q1
Document Fiscal Year Focus	2022
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2022
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		56,071,682
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		Mar. 31, 2022		Dec. 31, 2021
Current assets:
Cash and cash equivalents		$ 130,006		$ 239,278
Marketable securities at fair value		42,927		43,343
Restricted cash and cash equivalents (primarily related to VIEs)		111,127		104,166
Receivables:
Trade less allowance for credit losses of $90 and $90, respectively (primarily related to VIEs)		116,555		122,944
Other		20,756		18,144
Inventories		32,888		28,445
Costs and estimated earnings in excess of billings on uncompleted contracts	[1]	11,522		9,692
Prepaid expenses and other		42,208		35,920
Total current assets		507,989		601,932
Investment in unconsolidated companies		112,522		105,886
Deposits and other		70,398		78,915
Deferred income taxes		138,709		143,450
Property, plant and equipment, net		2,293,720		2,294,973
Construction-in-process		819,560		721,483
Operating leases right of use		19,753		19,357
Finance leases right of use		5,762		6,414
Intangible assets, net		355,185		363,314
Goodwill		90,591		89,954
Total assets		4,414,189	[2],[3]	4,425,678
Current liabilities:
Accounts payable and accrued expenses		164,752		143,186
Billings in excess of costs and estimated earnings on uncompleted contracts		10,964		9,248
Current portion of long-term debt:
Limited and non-recourse (primarily related to VIEs)		77,190		61,695
Full recourse		313,178		313,846
Financing liability		13,039		10,835
Operating lease liabilities		2,490		2,564
Finance lease liabilities		2,378		2,782
Total current liabilities		583,991		544,156
Long-term debt, net of current portion:
Financing liability		236,057		242,029
Operating lease liabilities		17,082		16,462
Finance lease liabilities		4,075		4,361
Liability associated with sale of tax benefits		129,381		134,953
Deferred income taxes		83,352		84,662
Liability for unrecognized tax benefits		6,034		5,730
Liabilities for severance pay		15,552		15,694
Asset retirement obligation		86,109		84,891
Other long-term liabilities		4,374		4,951
Total liabilities		2,389,932		2,417,888
Commitments and contingencies (Note 10)
Redeemable noncontrolling interest		9,408		9,329
Equity:
Common stock, par value $0.001 per share; 200,000,000 shares authorized; 56,071,682 and 56,056,450 issued and outstanding as of March 31, 2022 and December 31, 2021, respectively		56		56
Additional paid-in capital		1,274,838		1,271,925
Retained earnings		596,912		585,209
Accumulated other comprehensive income (loss)		(1,137)		(2,191)
Total stockholders' equity attributable to Company's stockholders		1,870,669		1,854,999
Noncontrolling interest		144,180		143,462
Total equity		2,014,849		1,998,461
Total liabilities, redeemable noncontrolling interest and equity		4,414,189		4,425,678
Senior Secured Notes [Member]
Long-term debt, net of current portion:
Limited and non-recourse (primarily related to VIEs and less deferred financing costs of $10,712 and $11,304, respectively)		507,520		539,664
Senior Unsecured Bonds [Member]
Long-term debt, net of current portion:
Full recourse (less deferred financing costs of $3,346 and $3,659, respectively)		$ 716,405		$ 740,335
[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 fully recognized as product revenues during the three months ended March 31, 2022 as a result of performance obligations having not been fully satisfied yet.
[2]	Electricity segment assets include goodwill in the amount of $86.0 million and $20.1 million as of March 31, 2022 and 2021, respectively. Energy Storage segment assets include goodwill in the amount of $4.6 million and $4.1 as of March 31, 2022 and 2021, respectively. No goodwill is included in the Product segment assets as of March 31, 2022 and 2021.
[3]	Including unconsolidated investments

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($)	Mar. 31, 2022	Dec. 31, 2021
Trade, allowance for credit losses	$ 90,000	$ 90,000
Property, plant and equipment, net	2,293,720,000	2,294,973,000
Construction-in-process	819,560,000	721,483,000
Operating leases right of use	19,753,000	19,357,000
Finance leases right of use	$ 5,762,000	$ 6,414,000
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)	56,071,682	56,056,450
Common stock, shares outstanding (in shares)	56,071,682	56,056,450
Senior Secured Notes [Member]
Deferred financing costs	$ 10,712,000	$ 11,304,000
Senior Unsecured Bonds [Member]
Deferred financing costs	3,346,000	3,659,000
Variable Interest Entity, Primary Beneficiary [Member]
Property, plant and equipment, net	2,153,106,000	2,159,696,000
Construction-in-process	413,556	366,924
Operating leases right of use	7,675,000	7,825,000
Finance leases right of use	$ 159,000	$ 192,000

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenues:
Revenue	$ 183,710	$ 166,352
Cost of revenues:
Cost of revenues	113,805	92,705
Gross profit	69,905	73,647
Operating expenses:
Research and development expenses	1,064	876
Selling and marketing expenses	4,365	4,276
General and administrative expenses	17,572	18,606
Write-off of Energy Storage projects and assets	1,826	0
Operating income	45,078	49,889
Other income (expense):
Interest income	342	263
Interest expense, net	(21,081)	(19,016)
Derivatives and foreign currency transaction gains (losses)	260	(16,866)
Income attributable to sale of tax benefits	7,705	6,355
Other non-operating income (expense), net	75	(331)
Income from operations before income tax and equity in earnings (losses) of investees	32,379	20,294
Income tax provision	(10,163)	(3,007)
Equity in earnings (losses) of investees, net	577	542
Net income	22,793	17,829
Net income attributable to noncontrolling interest	(4,363)	(2,570)
Net income attributable to the Company's stockholders	18,430	15,259
Comprehensive income:
Net income	22,793	17,829
Other comprehensive income (loss), net of related taxes:
Change in foreign currency translation adjustments	(1,156)	(1,826)
Change in unrealized gains or losses in respect of the Company's share in derivatives instruments of unconsolidated investment that qualifies as a cash flow hedge	3,902	3,755
Change in unrealized gains or losses in respect of a cross currency swap derivative instrument that qualifies as a cash flow hedge	(1,905)	(2,798)
Change in unrealized gains or losses on marketable securities available-for-sale (net of related tax)	(101)	(20)
Other changes in comprehensive income	15	16
Total other comprehensive income (loss), net of related taxes:	755	(873)
Comprehensive income	23,548	16,956
Comprehensive income attributable to noncontrolling interest	(4,064)	(1,997)
Comprehensive income attributable to the Company's stockholders	$ 19,484	$ 14,959
Earnings per share attributable to the Company's stockholders:
Basic: (in dollars per share)	$ 0.33	$ 0.27
Diluted: (in dollars per share)	$ 0.33	$ 0.27
Weighted average number of shares used in computation of earnings per share attributable to the Company's stockholders:
Basic (in shares)	56,063	55,988
Diluted (in shares)	56,366	56,735
Electricity [Member]
Revenues:
Revenue	$ 162,525	$ 144,988
Cost of revenues:
Cost of revenues	94,521	79,851
Product [Member]
Revenues:
Revenue	14,628	8,643
Cost of revenues:
Cost of revenues	13,613	8,074
Energy Storage and Management Services [Member]
Revenues:
Revenue	6,557	12,721
Cost of revenues:
Cost of revenues	$ 5,671	$ 4,780

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands		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, 2020									55,983
Balance 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
Exercise of stock-based awards by employees and directors	[1]								$ 0	0	0	0	0	0	0
Stock issuance costs reimbursement									0	285	0	0	285	0	285
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
Change in foreign currency translation adjustments									0	0	0	(1,253)	(1,253)	(573)	(1,826)
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
Change in respect of derivative instruments designated for cash flow hedge		$ 0	$ 0	$ 0	$ (2,798)	$ (2,798)	$ 0	$ (2,798)							(2,798)
Other									0	0	0	16	16	0	16
Change in unrealized gains or losses on marketable securities available-for-sale (net of related tax)									$ 0	0	0	(20)	(20)	0	(20)
Balance (in shares) at Mar. 31, 2021									55,984
Balance at Mar. 31, 2021									$ 56	1,264,828	558,644	(6,920)	1,816,608	133,271	1,949,879
Change in foreign currency translation adjustments									0	0	0	(1,253)	(1,253)	(573)	(1,826)
Change in unrealized gains or losses in respect of the Company's share in derivatives instruments of unconsolidated investment that qualifies as a cash flow hedge									$ 0	0	0	3,755	3,755	0	3,755
Balance (in shares) at Dec. 31, 2021									56,056
Balance at Dec. 31, 2021									$ 56	1,271,925	585,209	(2,191)	1,854,999	143,462	1,998,461
Stock-based compensation									$ 0	2,814	0	0	2,814	0	2,814
Exercise of stock-based awards by employees and directors (*) (in shares)									16
Exercise of stock-based awards by employees and directors									$ 0	99	0	0	99	0	99
Cash paid to noncontrolling interest									0	0	0	0	0	(3,088)	(3,088)
Cash dividend declared									0	0	(6,727)	0	(6,727)	0	(6,727)
Net income									0	0	18,430	0	18,430	4,105	22,535
Change in foreign currency translation adjustments									0	0	0	(857)	(857)	(299)	(1,156)
Change in unrealized gains or losses in respect of the Company's share in derivative instruments of unconsolidated investment									0	0	0	3,902	3,902	0	3,902
Change in respect of derivative instruments designated for cash flow hedge		$ 0	$ 0	$ 0	$ (1,905)	$ (1,905)	$ 0	$ (1,905)							(1,905)
Other									0	0	0	15	15	0	15
Change in unrealized gains or losses on marketable securities available-for-sale (net of related tax)									$ 0	0	0	(101)	(101)	0	(101)
Balance (in shares) at Mar. 31, 2022									56,072
Balance at Mar. 31, 2022									$ 56	1,274,838	596,912	(1,137)	1,870,669	144,180	2,014,849
Change in foreign currency translation adjustments									0	0	0	(857)	(857)	(299)	(1,156)
Change in unrealized gains or losses in respect of the Company's share in derivatives instruments of unconsolidated investment that qualifies as a cash flow hedge									$ 0	$ 0	$ 0	$ 3,902	$ 3,902	$ 0	$ 3,902
[1]	Resulted in an amount lower than $1 thousand.

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Equity (Unaudited) (Parentheticals) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Retained Earnings [Member]
Cash dividend declared, per share (in dollars per share)	$ 0.12	$ 0.12
Change in unrealized gains or losses on marketable securities available-for-sale, tax	$ 0	$ 0

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Cash Flow (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities:
Net income	$ 22,793	$ 17,829
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	48,108	42,100
Accretion of asset retirement obligation	1,230	955
Stock-based compensation	2,814	2,097
Income attributable to sale of tax benefits, net of interest expense	(4,603)	(4,245)
Equity in earnings of investees	(577)	(542)
Mark-to-market of derivative instruments	277	2,086
Disposal of property, plant and equipment	(109)	91
Write-off of Storage projects and assets	1,826	0
Loss (gain) on severance pay fund asset	161	358
Deferred income tax provision	2,805	(83)
Liability for unrecognized tax benefits	304	1,124
Other	328	0
Changes in operating assets and liabilities, net of businesses acquired:
Receivables	5,127	8,856
Costs and estimated earnings in excess of billings on uncompleted contracts	(1,830)	3,668
Inventories	(4,443)	(3,087)
Prepaid expenses and other	(7,179)	(7,259)
Change in operating lease right of use asset	692	658
Deposits and other	839	92
Accounts payable and accrued expenses	13,082	3,794
Billings in excess of costs and estimated earnings on uncompleted contracts	1,716	1,507
Liabilities for severance pay	(142)	(547)
Change in operating lease liabilities	(547)	(493)
Other long-term liabilities	(896)	(35)
Net cash provided by operating activities	81,776	68,924
Cash flows from investing activities:
Purchase of marketable securities	(19,192)	(27,755)
Maturities of marketable securities	19,290	0
Capital expenditures	(137,246)	(87,896)
Investment in unconsolidated companies	(2,157)	(2,005)
Decrease (increase) in severance pay fund asset, net of payments made to retired employees	(27)	182
Net cash used in investing activities	(139,332)	(117,474)
Cash flows from financing activities:
Proceeds from exercise of options by employees	99	0
Cash received from noncontrolling interest	5,443	5,390
Repayments of long-term debt	(39,058)	(16,573)
Stock issuance costs reimbursement	0	285
Cash paid to noncontrolling interest	(3,374)	(4,197)
Payments under finance lease obligations	(828)	(764)
Deferred debt issuance costs	(276)	(230)
Cash dividends paid	(6,727)	(6,718)
Net cash used in financing activities	(44,721)	(22,807)
Effect of exchange rate changes	(34)	(342)
Net change in cash and cash equivalents and restricted cash and cash equivalents	(102,311)	(71,699)
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	343,444	536,778
Cash and cash equivalents and restricted cash and cash equivalents at end of period	241,133	465,079
Supplemental non-cash investing and financing activities:
Increase (decrease) in accounts payable related to purchases of property, plant and equipment	8,448	(8,732)
Right of use assets obtained in exchange for new lease liabilities	$ 1,313	$ 467

Note 1 - General and Basis of P

Note 1 - General and Basis of Presentation	3 Months Ended
	Mar. 31, 2022
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 March 31, 2022, three March 31, 2022 2021 three March 31, 2022 2021. 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, 2021. December 31, 2021 December 31, 2021 not Dollar amounts, except per share data, in the notes to these financial statements are rounded to the closest $1,000. Heber 1 The Company's 40 1 February 25, 2022 1 81 1 April, 1 20 The Company holds a business interruption insurance subject to a 45 COVID- 19 In March 2020, 19" 19 second 2021, 19 not 19 19 19 In the Product segment, the Company experienced a significant decline in product backlog, which it believes resulted mainly due to the impact of COVID- 19 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. We have experienced and are experiencing supply chain difficulties, as well as an increase in the cost of raw materials and batteries, which may While the extent and duration of the economic downturn from the COVID- 19 may 19 no Write-offs of unsuccessful exploration activities There were no write-offs of unsuccessful exploration activities for the three March 31, 2022 2021. 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: March 31, December 31, March 31, 2022 2021 2021 (Dollars in thousands) Cash and cash equivalents $ 130,006 $ 239,278 $ 376,630 Restricted cash and cash equivalents 111,127 104,166 88,449 Total Cash and cash equivalents and restricted cash and cash equivalents $ 241,133 $ 343,444 $ 465,079 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 March 31, 2022 December 31, 2021, ten $250,000 March 31, 2022 December 31, 2021, At March 31, 2022 December 31, 2021, March 31, 2022 December 31, 2021, 10% The Company's revenues from its primary customers as a percentage of total revenues are as follows: Three Months Ended March 31, 2022 2021 Sierra Pacific Power Company and Nevada Power Company 19.5 % 21.4 % Southern California Public Power Authority (“SCPPA”) 21.9 24.9 Kenya Power and Lighting Co. Ltd. ("KPLC") 14.1 15.6 The Company has historically been able to collect on substantially all of its receivable balances. As of March 31, 2022, April 2022. In Honduras, as of March 31, 2022, April 2022. 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 March 31, 2022 2021 Three Months Ended March 31, 2022 2021 (Dollars in thousands) Beginning balance of the allowance for expected credit losses $ 90 $ 597 Change in the provision for expected credit losses for the period — — Ending balance of the allowance for expected credit losses $ 90 $ 597 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 March 31, 2022 December 31, 2021 March 31, December 31, 2022 2021 (Dollars in thousands) Contract assets (*) $ 11,522 $ 9,692 Contract liabilities (*) $ (10,964 ) $ (9,248 ) (*) 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 three March 31, 2022 not On March 31, 2022, not Disaggregated revenues from contracts with customers for the three March 31, 2022 2021 9 Leases in which the Company is a lessor The table below presents lease income recognized as a lessor: Three Months Ended March 31, 2022 2021 (Dollars in thousands) Lease income relating to lease payments from operating leases $ 139,681 $ 125,746 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	3 Months Ended
	Mar. 31, 2022
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 three March 31, 2022 There are no New accounting pronouncements effective in future periods Revenue Contracts Acquired in a Business Combination In October 2021, 2021 08, 805 2021 08" 2021 08 1 2 2021 08 606 2021 08 December 15, 2022 not 2021 08

Note 3 - Inventories

Note 3 - Inventories	3 Months Ended
	Mar. 31, 2022
Notes to Financial Statements
Inventory Disclosure [Text Block]	NOTE 3 INVENTORIES Inventories consist of the following: March 31, December 31, 2022 2021 (Dollars in thousands) Raw materials and purchased parts for assembly $ 12,906 $ 11,539 Self-manufactured assembly parts and finished products 19,982 16,906 Total inventories $ 32,888 $ 28,445

Note 4 - Marketable Securities

Note 4 - Marketable Securities	3 Months Ended
	Mar. 31, 2022
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: March 31, 2022 December 31, 2021 Amortized cost Gross unrealized gains Gross unrealized losses Fair value Amortized cost Gross unrealized gains Gross unrealized losses Fair value (Dollars in thousands) (Dollars in thousands) Debt security type: Corporate bonds $ 31,002 $ — $ (127 ) $ 31,043 $ 32,302 $ — $ (36 ) $ 32,529 Commercial paper 9,375 — — 9,375 8,891 — — 8,891 Money market funds 4,049 — — 4,049 3,686 — — 3,686 Foreign issuers 1,010 — (11 ) 1,005 1,920 — (4 ) 1,923 Municipal bonds 1,497 — (4 ) 1,504 — — — — Total debt securities available for sale $ 46,933 $ — $ (142 ) $ 46,976 $ 46,799 $ — $ (40 ) $ 47,029 As of March 31, 2022 December 31, 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: March 31, 2022 December 31, 2021 Less than 12 months Greater than 12 months Less than 12 months Greater than 12 months Fair value Gross unrealized loss Fair value Gross unrealized loss Fair value Gross unrealized loss Fair value Gross unrealized loss (Dollars in thousands) (Dollars in thousands) Debt security type: Corporate bonds $ 31,043 $ (127 ) $ — $ — $ 32,529 $ (36 ) $ — $ — Commercial paper 9,375 — — — 8,891 — — — Money market funds 4,049 — — — 3,686 — — — Foreign issuers 1,005 (11 ) — — 1,923 (4 ) — — Municipal bonds 1,504 (4 ) — — — — — — Total debt securities available for sale $ 46,976 $ (142 ) $ — $ — $ 47,029 $ (40 ) $ — $ — There were no sales of investments in debt securities during the three March 31, 2022 December 31, 2021.

Note 5 - Fair Value of Financia

Note 5 - Fair Value of Financial Instruments	3 Months Ended
	Mar. 31, 2022
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 March 31, 2022 December 31, 2021 March 31, 2022 Fair Value Carrying Value at March 31, 2022 Total Level 1 Level 2 Level 3 (Dollars in thousands) Assets: Current assets: Cash equivalents (including restricted cash accounts) $ 31,453 $ 31,453 $ 31,453 $ — $ — Marketable securities (including cash equivalents) 46,976 46,976 46,976 — — Derivatives: Cross currency swap (3) 569 569 — 569 — Currency forward contracts (2) 536 536 — 536 — Long-term Assets: Cross currency swap (3) 30,188 30,188 — 30,188 — Liabilities: Long term liabilities: Contingent payables (1) (2,385 ) (2,385 ) — — (2,385 ) $ 107,337 $ 107,337 $ 78,429 $ 31,293 $ (2,385 ) December 31, 2021 Fair Value Carrying Value at December 31, 2021 Total Level 1 Level 2 Level 3 (Dollars in thousands) Assets Current assets: Cash equivalents (including restricted cash accounts) $ 31,675 $ 31,675 $ 31,675 $ — $ — Marketable securities 47,029 47,029 47,029 — — Derivatives: Cross currency swap (3) 1,461 1,461 — 1,461 — Currency forward contracts (2) 813 813 — 813 — Long-term assets: Cross currency swap (3) 37,883 37,883 — 37,883 — Liabilities: Long-term liabilities: Contingent payables (1) (2,425 ) (2,425 ) — — (2,425 ) $ 116,436 $ 116,436 $ 78,704 $ 40,157 $ (2,425 ) 1. These amounts relate to contingent payables and warrants pertaining to the Guadeloupe power plant purchase transaction, valued primarily based on unobservable inputs and are included within “Other long-term liabilities” in the condensed consolidated balance sheets as of March 31, 2022 December 31, 2021, 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” in the condensed consolidated balance sheets as of March 31, 2022 December 31, 2021, 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 March 31, 2022 December 31, 2021, March 31, 2022 December 31, 2021. March 31, 2022 December 31, 2021. 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) Derivatives not designated as hedging instruments Location of recognized gain (loss) Three Months Ended March 31, 2022 2021 (Dollars in thousands) Swap transaction on Responsive Reserve System ("RRS") prices (1) Derivative and foreign currency transaction gains (losses) — (14,540 ) Currency forward contracts (1) Derivative and foreign currency transaction gains (losses) $ (208 ) $ (1,469 ) Derivatives designated as cash flow hedging instruments Cross currency swap (2) Derivative and foreign currency transaction gains (losses) $ (6,682 ) $ (11,102 ) ( 1 not third January 1, 2021 April 1, 2021. ( 2 1 There were no 1, 2 3 three March 31, 2022. 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 March 31, 2022: Three Months Ended March 31, 2022 2021 (Dollars in thousands) Cross currency swap cash flow hedge: Balance in Accumulated other comprehensive income (loss) beginning of period $ 5,745 $ 3,366 Gain or (loss) recognized in Other comprehensive income (loss) (8,587 ) (13,900 ) Amount reclassified from Other comprehensive income (loss) into earnings 6,682 11,102 Balance in Accumulated other comprehensive income (loss) end of period $ 3,840 $ 568 The estimated net amount of existing gain (loss) that is reported in "Accumulated other comprehensive income (loss)" as of March 31, 2022 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 March 31, 2022 December 31, 2021 March 31, 2022 December 31, 2021 (Dollars in millions) (Dollars in millions) HSBC Loan $ 46.8 $ 50.4 $ 46.4 $ 50.0 Hapoalim Loan 117.8 117.8 116.1 116.1 Discount Loan 94.0 100.2 93.8 100.0 Finance liability - Dixie Valley 245.2 248.4 249.1 252.9 Olkaria III Loan - DFC 161.2 166.5 152.2 156.7 Olkaria III plant 4 Loan - DEG 2 34.4 34.1 32.5 32.5 Olkaria III plant 1 Loan - DEG 3 30.3 30.1 28.4 28.4 Platanares Loan - DFC 95.6 98.2 86.0 88.1 Amatitlan Loan 18.6 19.8 18.4 19.3 Senior Secured Notes: OFC 2 LLC ("OFC 2") 178.1 183.3 168.8 173.3 Don A. Campbell 1 ("DAC 1") 68.0 69.8 66.3 67.9 USG Prudential - NV 28.6 28.9 26.1 26.3 USG Prudential - ID 16.2 17.3 16.5 17.3 USG DOE 38.3 39.9 34.1 35.5 Senior Unsecured Bonds 569.5 578.9 532.9 539.6 Senior Unsecured Loan 193.5 204.3 183.2 191.6 Plumstriker 14.5 14.8 14.4 14.7 Other long-term debt 12.1 13.3 12.6 13.6 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. As disclosed above under Note 1 19 may The carrying value of cash and cash equivalents, receivables, deposits and accounts payable (included in the condensed consolidated balance sheets) approximates its fair value. The following table presents the fair value of financial instruments as of March 31, 2022: Level 1 Level 2 Level 3 Total (Dollars in millions) HSBC Loan $ — $ — $ 46.8 $ 46.8 Hapoalim Loan — — 117.8 117.8 Discount Loan — — 94.0 94.0 Finance liability - Dixie Valley — — 245.2 245.2 Olkaria III Loan - DFC — — 161.2 161.2 Olkaria III plant 4 Loan - DEG 2 — — 34.4 34.4 Olkaria III plant 1 Loan - DEG 3 — — 30.3 30.3 Platanares Loan - DFC — — 95.6 95.6 Amatitlan Loan — 18.6 — 18.6 Senior Secured Notes: OFC 2 Senior Secured Notes — — 178.1 178.1 DAC 1 Senior Secured Notes — — 68.0 68.0 USG Prudential - NV — — 28.6 28.6 USG Prudential - ID — — 16.2 16.2 USG DOE — — 38.3 38.3 Senior Unsecured Bonds — — 569.5 569.5 Senior Unsecured Loan — — 193.5 193.5 Plumstriker — 14.5 — 14.5 Other long-term debt — — 12.1 12.1 Deposits 16.2 — — 16.2 The following table presents the fair value of financial instruments as of December 31, 2021: Level 1 Level 2 Level 3 Total (Dollars in millions) Olkaria III Loan - DFC $ — $ — $ 166.5 $ 166.5 Olkaria IV - DEG 2 — — 34.1 34.1 Olkaria IV - DEG 3 — — 30.1 30.1 Platanares Loan - DFC — — 98.2 98.2 Amatitlan Loan — 19.8 — 19.8 Senior Secured Notes: OFC 2 Senior Secured Notes — — 183.3 183.3 DAC 1 Senior Secured Notes — — 69.8 69.8 USG Prudential - NV — — 28.9 28.9 USG Prudential - ID — — 17.3 17.3 USG DOE — — 39.9 39.9 Senior Unsecured Bonds — — 578.9 578.9 Senior Unsecured Loan — — 204.3 204.3 Plumstriker — 14.8 — 14.8 Other long-term debt — — 13.3 13.3 Deposits 17.1 — — 17.1

Note 6 - Stock-based Compensati

Note 6 - Stock-based Compensation	3 Months Ended
	Mar. 31, 2022
Notes to Financial Statements
Share-Based Payment Arrangement [Text Block]	NOTE 6 STOCK-BASED COMPENSATION In March 2022, 2018 six 1 4 The fair value of each SAR, RSU and PSU on the grant date was $22.31, $69.9 and $75.3, respectively. The Company calculated the fair value of each SAR and RSU on the grant date using the complex lattice, tree-based option-pricing model based on the following assumptions: Risk-free interest rates 1.3% - 1.6% Expected life (in years) 2 - 5.75 Dividend yield 0.67% Expected volatility (weighted average) 32.8% - 46.1%

Note 7 - Interest Expense, Net

Note 7 - Interest Expense, Net	3 Months Ended
	Mar. 31, 2022
Notes to Financial Statements
Interest Expense Disclosure [Text Block]	NOTE 7 INTEREST EXPENSE, NET The components of interest expense are as follows: Three Months Ended March 31, 2022 2021 (Dollars in thousands) Interest related to sale of tax benefits $ 3,431 $ 2,394 Interest expense 22,486 19,674 Less — amount capitalized (4,836 ) (3,052 ) Total interest expense, net $ 21,081 $ 19,016

Note 8 - Earnings Per Share

Note 8 - Earnings Per Share	3 Months Ended
	Mar. 31, 2022
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 March 31, 2022 2021 Weighted average number of shares used in computation of basic earnings per share: 56,063 55,988 Additional shares from the assumed exercise of employee stock awards 303 747 Weighted average number of shares used in computation of diluted earnings per share 56,366 56,735 The number of stock-based awards that could potentially dilute future earnings per share and that were not three March 31, 2022 2021,

Note 9 - Business Segments

Note 9 - Business Segments	3 Months Ended
	Mar. 31, 2022
Notes to Financial Statements
Segment Reporting Disclosure [Text Block]	NOTE 9 BUSINESS SEGMENTS The Company has three reporting segments: the Electricity segment, the Product segment and the Energy Storage segment. These segments are managed and reported separately as each offers different products and serves different markets. • 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 foreign countries, and sells the electricity generated by those power plants. • Under the Product segment, the Company designs, manufactures and sells equipment for geothermal and recovered energy-based electricity generation and remote power units and provides 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. 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 March 31, 2022: Revenues from external customers: United States (1) $ 116,109 $ 535 $ 6,557 $ 123,201 Foreign (2) 46,416 14,093 — 60,509 Net revenue from external customers 162,525 14,628 6,557 183,710 Intersegment revenues (4) — 20,903 — — Operating income (loss) 47,575 (1,575 ) (922 ) 45,078 Segment assets at period end (3) (*) 4,093,759 140,957 179,473 4,414,189 * Including unconsolidated investments 112,522 — — 112,522 Three Months Ended March 31, 2021: Revenues from external customers: United States (1) $ 98,976 $ 1,853 $ 12,721 $ 113,550 Foreign (2) 46,012 6,790 — 52,802 Net revenue from external customers 144,988 8,643 12,721 166,352 Intersegment revenues (4) — 25,334 — — Operating income (loss) 47,749 (1,211 ) 3,351 49,889 Segment assets at period end (3) (*) 3,577,745 140,039 141,429 3,859,213 * Including unconsolidated investments 104,519 — — 104,519 ( 1 Electricity segment revenues in the United States are all accounted under lease accounting except for $22.8 million and $19.2 million for the three March 31, 2022 2021, 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 $86.0 million and $20.1 million as of March 31, 2022 2021, March 31, 2022 2021, March 31, 2022 2021. ( 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 March 31, 2022 2021 (Dollars in thousands) Revenues: Total segment revenues $ 183,710 $ 166,352 Intersegment revenues 20,903 25,334 Elimination of intersegment revenues (20,903 ) (25,334 ) Total consolidated revenues $ 183,710 $ 166,352 Operating income: Operating income $ 45,078 $ 49,889 Interest income 342 263 Interest expense, net (21,081 ) (19,016 ) Derivatives and foreign currency transaction gains (losses) 260 (16,866 ) Income attributable to sale of tax benefits 7,705 6,355 Other non-operating income (expense), net 75 (331 ) Total consolidated income before income taxes and equity in income of investees $ 32,379 $ 20,294

Note 10 - Commitments and Conti

Note 10 - Commitments and Contingencies	3 Months Ended
	Mar. 31, 2022
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	NOTE 10 COMMITMENTS AND CONTINGENCIES • On March 29, 2016, 27th 10 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. April 13, 2022, • On September 14, 2021, may • On December 15, 2021, No January 4, 2022. January 14, 2022, 90 February 2022. April 4, 2022, 1973 no may March 31, 2022, 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	3 Months Ended
	Mar. 31, 2022
Notes to Financial Statements
Income Tax Disclosure [Text Block]	NOTE 11 INCOME TAXES The Company’s effective tax rate provision for the three March 31, 2022 2021 In response to the COVID- 19 March 27, 2020 three March 31, 2022, no 19

Note 12 - Subsequent Events

Note 12 - Subsequent Events	3 Months Ended
	Mar. 31, 2022
Notes to Financial Statements
Subsequent Events [Text Block]	NOTE 12 SUBSEQUENT EVENTS Cash Dividend On May 2, 2022, May 16, 2022 May 31, 2022 Mizrahi Bank Loan On April 12, 2022, October 12, 2022 8 not not not

Significant Accounting Policies

Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2022
Accounting Policies [Abstract]
Basis of Accounting, Policy [Policy Text Block]	These unaudited condensed consolidated interim financial statements of Ormat Technologies, Inc. and its subsidiaries (collectively, the “Company”) have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) and pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”) for interim financial statements. Accordingly, they do not March 31, 2022, three March 31, 2022 2021 three March 31, 2022 2021. 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, 2021. December 31, 2021 December 31, 2021 not Dollar amounts, except per share data, in the notes to these financial statements are rounded to the closest $1,000.
Property, Plant and Equipment, Impairment [Policy Text Block]	Heber 1 The Company's 40 1 February 25, 2022 1 81 1 April, 1 20 The Company holds a business interruption insurance subject to a 45
Effect of COVID-19 Pandemic, Policy [Policy Text Block]	COVID- 19 In March 2020, 19" 19 second 2021, 19 not 19 19 19 In the Product segment, the Company experienced a significant decline in product backlog, which it believes resulted mainly due to the impact of COVID- 19 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. We have experienced and are experiencing supply chain difficulties, as well as an increase in the cost of raw materials and batteries, which may While the extent and duration of the economic downturn from the COVID- 19 may 19 no
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 March 31, 2022 2021.
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: March 31, December 31, March 31, 2022 2021 2021 (Dollars in thousands) Cash and cash equivalents $ 130,006 $ 239,278 $ 376,630 Restricted cash and cash equivalents 111,127 104,166 88,449 Total Cash and cash equivalents and restricted cash and cash equivalents $ 241,133 $ 343,444 $ 465,079
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 March 31, 2022 December 31, 2021, ten $250,000 March 31, 2022 December 31, 2021, At March 31, 2022 December 31, 2021, March 31, 2022 December 31, 2021, 10% The Company's revenues from its primary customers as a percentage of total revenues are as follows: Three Months Ended March 31, 2022 2021 Sierra Pacific Power Company and Nevada Power Company 19.5 % 21.4 % Southern California Public Power Authority (“SCPPA”) 21.9 24.9 Kenya Power and Lighting Co. Ltd. ("KPLC") 14.1 15.6 The Company has historically been able to collect on substantially all of its receivable balances. As of March 31, 2022, April 2022. In Honduras, as of March 31, 2022, April 2022. 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 March 31, 2022 2021 Three Months Ended March 31, 2022 2021 (Dollars in thousands) Beginning balance of the allowance for expected credit losses $ 90 $ 597 Change in the provision for expected credit losses for the period — — Ending balance of the allowance for expected credit losses $ 90 $ 597
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 March 31, 2022 December 31, 2021 March 31, December 31, 2022 2021 (Dollars in thousands) Contract assets (*) $ 11,522 $ 9,692 Contract liabilities (*) $ (10,964 ) $ (9,248 ) (*) 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 three March 31, 2022 not On March 31, 2022, not Disaggregated revenues from contracts with customers for the three March 31, 2022 2021 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 March 31, 2022 2021 (Dollars in thousands) Lease income relating to lease payments from operating leases $ 139,681 $ 125,746
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)	3 Months Ended
	Mar. 31, 2022
Notes Tables
Schedule of Cash and Cash Equivalents [Table Text Block]	March 31, December 31, March 31, 2022 2021 2021 (Dollars in thousands) Cash and cash equivalents $ 130,006 $ 239,278 $ 376,630 Restricted cash and cash equivalents 111,127 104,166 88,449 Total Cash and cash equivalents and restricted cash and cash equivalents $ 241,133 $ 343,444 $ 465,079
Schedules of Concentration of Risk, by Risk Factor [Table Text Block]	Three Months Ended March 31, 2022 2021 Sierra Pacific Power Company and Nevada Power Company 19.5 % 21.4 % Southern California Public Power Authority (“SCPPA”) 21.9 24.9 Kenya Power and Lighting Co. Ltd. ("KPLC") 14.1 15.6
Accounts Receivable, Allowance for Credit Loss [Table Text Block]	Three Months Ended March 31, 2022 2021 (Dollars in thousands) Beginning balance of the allowance for expected credit losses $ 90 $ 597 Change in the provision for expected credit losses for the period — — Ending balance of the allowance for expected credit losses $ 90 $ 597
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]	March 31, December 31, 2022 2021 (Dollars in thousands) Contract assets (*) $ 11,522 $ 9,692 Contract liabilities (*) $ (10,964 ) $ (9,248 )
Operating Lease, Lease Income [Table Text Block]	Three Months Ended March 31, 2022 2021 (Dollars in thousands) Lease income relating to lease payments from operating leases $ 139,681 $ 125,746

Note 3 - Inventories (Tables)

Note 3 - Inventories (Tables)	3 Months Ended
	Mar. 31, 2022
Notes Tables
Schedule of Inventory, Current [Table Text Block]	March 31, December 31, 2022 2021 (Dollars in thousands) Raw materials and purchased parts for assembly $ 12,906 $ 11,539 Self-manufactured assembly parts and finished products 19,982 16,906 Total inventories $ 32,888 $ 28,445

Note 4 - Marketable Securities

Note 4 - Marketable Securities (Tables)	3 Months Ended
	Mar. 31, 2022
Notes Tables
Debt Securities, Available-for-Sale [Table Text Block]	March 31, 2022 December 31, 2021 Amortized cost Gross unrealized gains Gross unrealized losses Fair value Amortized cost Gross unrealized gains Gross unrealized losses Fair value (Dollars in thousands) (Dollars in thousands) Debt security type: Corporate bonds $ 31,002 $ — $ (127 ) $ 31,043 $ 32,302 $ — $ (36 ) $ 32,529 Commercial paper 9,375 — — 9,375 8,891 — — 8,891 Money market funds 4,049 — — 4,049 3,686 — — 3,686 Foreign issuers 1,010 — (11 ) 1,005 1,920 — (4 ) 1,923 Municipal bonds 1,497 — (4 ) 1,504 — — — — Total debt securities available for sale $ 46,933 $ — $ (142 ) $ 46,976 $ 46,799 $ — $ (40 ) $ 47,029
Investments Classified by Contractual Maturity Date [Table Text Block]	March 31, 2022 December 31, 2021 Less than 12 months Greater than 12 months Less than 12 months Greater than 12 months Fair value Gross unrealized loss Fair value Gross unrealized loss Fair value Gross unrealized loss Fair value Gross unrealized loss (Dollars in thousands) (Dollars in thousands) Debt security type: Corporate bonds $ 31,043 $ (127 ) $ — $ — $ 32,529 $ (36 ) $ — $ — Commercial paper 9,375 — — — 8,891 — — — Money market funds 4,049 — — — 3,686 — — — Foreign issuers 1,005 (11 ) — — 1,923 (4 ) — — Municipal bonds 1,504 (4 ) — — — — — — Total debt securities available for sale $ 46,976 $ (142 ) $ — $ — $ 47,029 $ (40 ) $ — $ —

Note 5 - Fair Value of Financ_2

Note 5 - Fair Value of Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2022
Notes Tables
Fair Value, by Balance Sheet Grouping [Table Text Block]	March 31, 2022 Fair Value Carrying Value at March 31, 2022 Total Level 1 Level 2 Level 3 (Dollars in thousands) Assets: Current assets: Cash equivalents (including restricted cash accounts) $ 31,453 $ 31,453 $ 31,453 $ — $ — Marketable securities (including cash equivalents) 46,976 46,976 46,976 — — Derivatives: Cross currency swap (3) 569 569 — 569 — Currency forward contracts (2) 536 536 — 536 — Long-term Assets: Cross currency swap (3) 30,188 30,188 — 30,188 — Liabilities: Long term liabilities: Contingent payables (1) (2,385 ) (2,385 ) — — (2,385 ) $ 107,337 $ 107,337 $ 78,429 $ 31,293 $ (2,385 ) December 31, 2021 Fair Value Carrying Value at December 31, 2021 Total Level 1 Level 2 Level 3 (Dollars in thousands) Assets Current assets: Cash equivalents (including restricted cash accounts) $ 31,675 $ 31,675 $ 31,675 $ — $ — Marketable securities 47,029 47,029 47,029 — — Derivatives: Cross currency swap (3) 1,461 1,461 — 1,461 — Currency forward contracts (2) 813 813 — 813 — Long-term assets: Cross currency swap (3) 37,883 37,883 — 37,883 — Liabilities: Long-term liabilities: Contingent payables (1) (2,425 ) (2,425 ) — — (2,425 ) $ 116,436 $ 116,436 $ 78,704 $ 40,157 $ (2,425 )
Derivative Instruments, Gain (Loss) [Table Text Block]	Amount of recognized gain (loss) Derivatives not designated as hedging instruments Location of recognized gain (loss) Three Months Ended March 31, 2022 2021 (Dollars in thousands) Swap transaction on Responsive Reserve System ("RRS") prices (1) Derivative and foreign currency transaction gains (losses) — (14,540 ) Currency forward contracts (1) Derivative and foreign currency transaction gains (losses) $ (208 ) $ (1,469 ) Derivatives designated as cash flow hedging instruments Cross currency swap (2) Derivative and foreign currency transaction gains (losses) $ (6,682 ) $ (11,102 )
Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block]	Three Months Ended March 31, 2022 2021 (Dollars in thousands) Cross currency swap cash flow hedge: Balance in Accumulated other comprehensive income (loss) beginning of period $ 5,745 $ 3,366 Gain or (loss) recognized in Other comprehensive income (loss) (8,587 ) (13,900 ) Amount reclassified from Other comprehensive income (loss) into earnings 6,682 11,102 Balance in Accumulated other comprehensive income (loss) end of period $ 3,840 $ 568
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block]	Fair Value Carrying Amount March 31, 2022 December 31, 2021 March 31, 2022 December 31, 2021 (Dollars in millions) (Dollars in millions) HSBC Loan $ 46.8 $ 50.4 $ 46.4 $ 50.0 Hapoalim Loan 117.8 117.8 116.1 116.1 Discount Loan 94.0 100.2 93.8 100.0 Finance liability - Dixie Valley 245.2 248.4 249.1 252.9 Olkaria III Loan - DFC 161.2 166.5 152.2 156.7 Olkaria III plant 4 Loan - DEG 2 34.4 34.1 32.5 32.5 Olkaria III plant 1 Loan - DEG 3 30.3 30.1 28.4 28.4 Platanares Loan - DFC 95.6 98.2 86.0 88.1 Amatitlan Loan 18.6 19.8 18.4 19.3 Senior Secured Notes: OFC 2 LLC ("OFC 2") 178.1 183.3 168.8 173.3 Don A. Campbell 1 ("DAC 1") 68.0 69.8 66.3 67.9 USG Prudential - NV 28.6 28.9 26.1 26.3 USG Prudential - ID 16.2 17.3 16.5 17.3 USG DOE 38.3 39.9 34.1 35.5 Senior Unsecured Bonds 569.5 578.9 532.9 539.6 Senior Unsecured Loan 193.5 204.3 183.2 191.6 Plumstriker 14.5 14.8 14.4 14.7 Other long-term debt 12.1 13.3 12.6 13.6
Fair Value, Liabilities Measured on Recurring and Nonrecurring Basis [Table Text Block]	Level 1 Level 2 Level 3 Total (Dollars in millions) HSBC Loan $ — $ — $ 46.8 $ 46.8 Hapoalim Loan — — 117.8 117.8 Discount Loan — — 94.0 94.0 Finance liability - Dixie Valley — — 245.2 245.2 Olkaria III Loan - DFC — — 161.2 161.2 Olkaria III plant 4 Loan - DEG 2 — — 34.4 34.4 Olkaria III plant 1 Loan - DEG 3 — — 30.3 30.3 Platanares Loan - DFC — — 95.6 95.6 Amatitlan Loan — 18.6 — 18.6 Senior Secured Notes: OFC 2 Senior Secured Notes — — 178.1 178.1 DAC 1 Senior Secured Notes — — 68.0 68.0 USG Prudential - NV — — 28.6 28.6 USG Prudential - ID — — 16.2 16.2 USG DOE — — 38.3 38.3 Senior Unsecured Bonds — — 569.5 569.5 Senior Unsecured Loan — — 193.5 193.5 Plumstriker — 14.5 — 14.5 Other long-term debt — — 12.1 12.1 Deposits 16.2 — — 16.2 Level 1 Level 2 Level 3 Total (Dollars in millions) Olkaria III Loan - DFC $ — $ — $ 166.5 $ 166.5 Olkaria IV - DEG 2 — — 34.1 34.1 Olkaria IV - DEG 3 — — 30.1 30.1 Platanares Loan - DFC — — 98.2 98.2 Amatitlan Loan — 19.8 — 19.8 Senior Secured Notes: OFC 2 Senior Secured Notes — — 183.3 183.3 DAC 1 Senior Secured Notes — — 69.8 69.8 USG Prudential - NV — — 28.9 28.9 USG Prudential - ID — — 17.3 17.3 USG DOE — — 39.9 39.9 Senior Unsecured Bonds — — 578.9 578.9 Senior Unsecured Loan — — 204.3 204.3 Plumstriker — 14.8 — 14.8 Other long-term debt — — 13.3 13.3 Deposits 17.1 — — 17.1

Note 6 - Stock-based Compensa_2

Note 6 - Stock-based Compensation (Tables)	3 Months Ended
	Mar. 31, 2022
Notes Tables
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]	Risk-free interest rates 1.3% - 1.6% Expected life (in years) 2 - 5.75 Dividend yield 0.67% Expected volatility (weighted average) 32.8% - 46.1%

Note 7 - Interest Expense, Net

Note 7 - Interest Expense, Net (Tables)	3 Months Ended
	Mar. 31, 2022
Notes Tables
Schedule of Other Nonoperating Expense, by Component [Table Text Block]	Three Months Ended March 31, 2022 2021 (Dollars in thousands) Interest related to sale of tax benefits $ 3,431 $ 2,394 Interest expense 22,486 19,674 Less — amount capitalized (4,836 ) (3,052 ) Total interest expense, net $ 21,081 $ 19,016

Note 8 - Earnings Per Share (Ta

Note 8 - Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2022
Notes Tables
Schedule of Weighted Average Number of Shares [Table Text Block]	Three Months Ended March 31, 2022 2021 Weighted average number of shares used in computation of basic earnings per share: 56,063 55,988 Additional shares from the assumed exercise of employee stock awards 303 747 Weighted average number of shares used in computation of diluted earnings per share 56,366 56,735

Note 9 - Business Segments (Tab

Note 9 - Business Segments (Tables)	3 Months Ended
	Mar. 31, 2022
Notes Tables
Schedule of Segment Reporting Information, by Segment [Table Text Block]	Electricity Product Energy Storage Consolidated (Dollars in thousands) Three Months Ended March 31, 2022: Revenues from external customers: United States (1) $ 116,109 $ 535 $ 6,557 $ 123,201 Foreign (2) 46,416 14,093 — 60,509 Net revenue from external customers 162,525 14,628 6,557 183,710 Intersegment revenues (4) — 20,903 — — Operating income (loss) 47,575 (1,575 ) (922 ) 45,078 Segment assets at period end (3) (*) 4,093,759 140,957 179,473 4,414,189 * Including unconsolidated investments 112,522 — — 112,522 Three Months Ended March 31, 2021: Revenues from external customers: United States (1) $ 98,976 $ 1,853 $ 12,721 $ 113,550 Foreign (2) 46,012 6,790 — 52,802 Net revenue from external customers 144,988 8,643 12,721 166,352 Intersegment revenues (4) — 25,334 — — Operating income (loss) 47,749 (1,211 ) 3,351 49,889 Segment assets at period end (3) (*) 3,577,745 140,039 141,429 3,859,213 * Including unconsolidated investments 104,519 — — 104,519
Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block]	Three Months Ended March 31, 2022 2021 (Dollars in thousands) Revenues: Total segment revenues $ 183,710 $ 166,352 Intersegment revenues 20,903 25,334 Elimination of intersegment revenues (20,903 ) (25,334 ) Total consolidated revenues $ 183,710 $ 166,352 Operating income: Operating income $ 45,078 $ 49,889 Interest income 342 263 Interest expense, net (21,081 ) (19,016 ) Derivatives and foreign currency transaction gains (losses) 260 (16,866 ) Income attributable to sale of tax benefits 7,705 6,355 Other non-operating income (expense), net 75 (331 ) Total consolidated income before income taxes and equity in income of investees $ 32,379 $ 20,294

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		12 Months Ended
	Apr. 30, 2022	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Exploration Abandonment and Impairment Expense		$ 0	$ 0
Cash, FDIC Insured Amount		31,800		$ 31,000
Cash, Uninsured Amount		82,800		64,300
Accounts Receivable, after Allowance for Credit Loss, Current, Total		116,555		$ 122,944
Kenya Power and Lighting Co Limited [Member]
Accounts Receivable, Past Due		19,800
Kenya Power and Lighting Co Limited [Member] | Subsequent Event [Member]
Proceeds, Overdue Accounts Receivable	$ 9,400
ENEE [Member]
Accounts Receivable, Past Due		$ 20,500
ENEE [Member] | Subsequent Event [Member]
Proceeds, Overdue Accounts Receivable	$ 4,800
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Primary Customers [Member]
Concentration Risk, Percentage		54.00%		58.00%
Non-US [Member]
Accounts Receivable, after Allowance for Credit Loss, Current, Total		$ 76,800		$ 77,500

Note 1 - General and Basis of_4

Note 1 - General and Basis of Presentation 2 (Details Textual) - Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-04-01 - Product [Member] $ in Millions	Mar. 31, 2022USD ($)
Revenue, Remaining Performance Obligation, Amount	$ 45.7
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	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Cash and cash equivalents	$ 130,006	$ 239,278	$ 376,630
Restricted cash and cash equivalents	111,127	104,166	88,449
Total Cash and cash equivalents and restricted cash and cash equivalents	$ 241,133	$ 343,444	$ 465,079	$ 536,778

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
	Mar. 31, 2022	Mar. 31, 2021
Sierra Pacific Power Company And Nevada Power Company [Member]
Percent of revenues	19.50%	21.40%
Southern California Public Power Authority [Member]
Percent of revenues	21.90%	24.90%
Kenya Power and Lighting Co LTD [Member]
Percent of revenues	14.10%	15.60%

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
	Mar. 31, 2022	Mar. 31, 2021
Beginning balance of the allowance for expected credit losses	$ 90
Ending balance of the allowance for expected credit losses	90
Accounting Standards Update 2016-13 [Member]
Beginning balance of the allowance for expected credit losses	90	$ 597
Change in the provision for expected credit losses for the period	0	0
Ending balance of the allowance for expected credit losses	$ 90	$ 597

Note 1 - General and Basis of_8

Note 1 - General and Basis of Presentation - Contract Assets (Liabilities) (Details) - USD ($) $ in Thousands		Mar. 31, 2022	Dec. 31, 2021
Contract assets (*)	[1]	$ 11,522	$ 9,692
Contract liabilities (*)	[1]	$ (10,964)	$ (9,248)
[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 fully recognized as product revenues during the three months ended March 31, 2022 as a result of performance obligations having not been fully 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
	Mar. 31, 2022	Mar. 31, 2021
Lease income relating to lease payments from operating leases	$ 139,681	$ 125,746

Note 3 - Inventories - Inventor

Note 3 - Inventories - Inventories (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Raw materials and purchased parts for assembly	$ 12,906	$ 11,539
Self-manufactured assembly parts and finished products	19,982	16,906
Total inventories	$ 32,888	$ 28,445

Note 4 - Marketable Securitie_2

Note 4 - Marketable Securities (Details Textual) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-Sale, Total	$ 42,927	$ 43,343
Proceeds from Sale of Debt Securities, Available-for-sale	0	0
Cash and Cash Equivalents [Member]
Debt Securities, Available-for-Sale, Total	$ 4,000	$ 3,700

Note 4 - Marketable Securitie_3

Note 4 - Marketable Securities - Investment in Marketable Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Amortized cost	$ 46,933	$ 46,799
Gross unrealized gains	0	0
Gross unrealized losses	(142)	(40)
Fair value	46,976	47,029
Corporate Debt Securities [Member]
Amortized cost	31,002	32,302
Gross unrealized gains	0	0
Gross unrealized losses	(127)	(36)
Fair value	31,043	32,529
Commercial Paper [Member]
Amortized cost	9,375	8,891
Gross unrealized gains	0	0
Gross unrealized losses	0	0
Fair value	9,375	8,891
Money Market Funds [Member]
Amortized cost	4,049	3,686
Gross unrealized gains	0	0
Gross unrealized losses	0	0
Fair value	4,049	3,686
Debt Security, Corporate, Non-US [Member]
Amortized cost	1,010	1,920
Gross unrealized gains	0	0
Gross unrealized losses	(11)	(4)
Fair value	1,005	1,923
Municipal Bonds [Member]
Amortized cost	1,497	0
Gross unrealized gains	0	0
Gross unrealized losses	(4)	0
Fair value	$ 1,504	$ 0

Note 4 - Marketable Securitie_4

Note 4 - Marketable Securities - Fair Value and Gross Unrealized Losses (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Fair value	$ 42,927	$ 43,343
Gross unrealized losses	(142)	(40)
Marketable securities at fair value	42,927	43,343
Maturity, Less Than 12 Months [Member]
Fair value	46,976	47,029
Gross unrealized losses	(142)	(40)
Marketable securities at fair value	46,976	47,029
Maturity, Greater Than 12 Months [Member]
Fair value	0	0
Gross unrealized losses	0	0
Marketable securities at fair value	0	0
Corporate Debt Securities [Member]
Gross unrealized losses	(127)	(36)
Corporate Debt Securities [Member] | Maturity, Less Than 12 Months [Member]
Fair value	31,043	32,529
Gross unrealized losses	(127)	(36)
Marketable securities at fair value	31,043	32,529
Corporate Debt Securities [Member] | Maturity, Greater Than 12 Months [Member]
Fair value	0	0
Gross unrealized losses	0	0
Marketable securities at fair value	0	0
Commercial Paper [Member]
Gross unrealized losses	0	0
Commercial Paper [Member] | Maturity, Less Than 12 Months [Member]
Fair value	9,375	8,891
Gross unrealized losses	0	0
Marketable securities at fair value	9,375	8,891
Commercial Paper [Member] | Maturity, Greater Than 12 Months [Member]
Fair value	0	0
Gross unrealized losses	0	0
Marketable securities at fair value	0	0
Money Market Funds [Member]
Gross unrealized losses	0	0
Money Market Funds [Member] | Maturity, Less Than 12 Months [Member]
Fair value	4,049	3,686
Gross unrealized losses	0	0
Marketable securities at fair value	4,049	3,686
Money Market Funds [Member] | Maturity, Greater Than 12 Months [Member]
Fair value	0	0
Gross unrealized losses	0	0
Marketable securities at fair value	0	0
Debt Security, Corporate, Non-US [Member]
Gross unrealized losses	(11)	(4)
Debt Security, Corporate, Non-US [Member] | Maturity, Less Than 12 Months [Member]
Fair value	1,005	1,923
Gross unrealized losses	(11)	(4)
Marketable securities at fair value	1,005	1,923
Debt Security, Corporate, Non-US [Member] | Maturity, Greater Than 12 Months [Member]
Fair value	0	0
Gross unrealized losses	0	0
Marketable securities at fair value	0	0
Municipal Bonds [Member]
Gross unrealized losses	(4)	0
Municipal Bonds [Member] | Maturity, Less Than 12 Months [Member]
Fair value	1,504	0
Gross unrealized losses	(4)	0
Marketable securities at fair value	1,504	0
Municipal Bonds [Member] | Maturity, Greater Than 12 Months [Member]
Fair value	0	0
Gross unrealized losses	0	0
Marketable securities at fair value	$ 0	$ 0

Note 5 - Fair Value of Financ_3

Note 5 - Fair Value of Financial Instruments (Details Textual) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Cross Currency Interest Rate Contract [Member] | Prepaid Expenses and Other and Deposits and Other [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		Mar. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-Sale, Total		$ 42,927	$ 43,343
Reported Value Measurement [Member]
Cash equivalents (including restricted cash accounts)		31,453	31,675
Debt Securities, Available-for-Sale, Total		46,976	47,029
Fair Value, Net Asset (Liability), Total		107,337	116,436
Reported Value Measurement [Member] | Cross Currency Interest Rate Contract [Member]
Derivative Assets, current	[1]	569	1,461
Cross currency swap (3)	[1]	30,188	37,883
Reported Value Measurement [Member] | Currency Forward Contracts [Member]
Derivative Assets, current	[2]	536	813
Reported Value Measurement [Member] | Contingent Payable [Member]
Derivatives, noncurrent	[3]	(2,385)	(2,425)
Estimate of Fair Value Measurement [Member]
Cash equivalents (including restricted cash accounts)		31,453	31,675
Debt Securities, Available-for-Sale, Total		46,976	47,029
Fair Value, Net Asset (Liability), Total		107,337	116,436
Estimate of Fair Value Measurement [Member] | Cross Currency Interest Rate Contract [Member]
Derivative Assets, current	[1]	569	1,461
Cross currency swap (3)	[1]	30,188	37,883
Estimate of Fair Value Measurement [Member] | Currency Forward Contracts [Member]
Derivative Assets, current	[2]	536	813
Estimate of Fair Value Measurement [Member] | Contingent Payable [Member]
Derivatives, noncurrent	[3]	(2,385)	(2,425)
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Cash equivalents (including restricted cash accounts)		31,453	31,675
Debt Securities, Available-for-Sale, Total		46,976	47,029
Fair Value, Net Asset (Liability), Total		78,429	78,704
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] | Cross Currency Interest Rate Contract [Member]
Derivative Assets, current	[1]	0	0
Cross currency swap (3)	[1]	0	0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] | Currency Forward Contracts [Member]
Derivative Assets, current	[2]	0	0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] | Contingent Payable [Member]
Derivatives, noncurrent	[3]	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	0
Fair Value, Net Asset (Liability), Total		31,293	40,157
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Cross Currency Interest Rate Contract [Member]
Derivative Assets, current	[1]	569	1,461
Cross currency swap (3)	[1]	30,188	37,883
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Currency Forward Contracts [Member]
Derivative Assets, current	[2]	536	813
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Contingent Payable [Member]
Derivatives, noncurrent	[3]	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	0
Fair Value, Net Asset (Liability), Total		(2,385)	(2,425)
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] | Cross Currency Interest Rate Contract [Member]
Derivative Assets, current	[1]	0	0
Cross currency swap (3)	[1]	0	0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] | Currency Forward Contracts [Member]
Derivative Assets, current	[2]	0	0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] | Contingent Payable [Member]
Derivatives, noncurrent	[3]	$ (2,385)	$ (2,425)
[1]	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 March 31, 2022 and December 31, 2021, as applicable. These amounts are included within "Prepaid expenses and other" and “Deposits and other”, as applicable, in the condensed consolidated balance sheets as of March 31, 2022 and December 31, 2021. There are no cash collateral deposits on March 31, 2022 and December 31, 2021.
[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” in the condensed consolidated balance sheets as of March 31, 2022 and December 31, 2021, 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 contingent payables and warrants pertaining to the Guadeloupe power plant purchase transaction, valued primarily based on unobservable inputs and are included within “Other long-term liabilities” in the condensed consolidated balance sheets as of March 31, 2022 and December 31, 2021, 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.

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) - Derivatives and Foreign Currency Transaction Gains (Losses) [Member] - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Currency Forward and Price Swap Transaction on Responsive Reserve System ("RRS") Prices [Member]
Amount of gain (loss) recognized		$ 0	$ (14,540)
Currency Forward Contracts [Member]
Amount of gain (loss) recognized	[1]	(208)	(1,469)
Cross Currency Interest Rate Contract [Member] | Designated as Hedging Instrument [Member]
Cross currency swap (2)	[2]	$ (6,682)	$ (11,102)
[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 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 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 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 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
		Mar. 31, 2022	Mar. 31, 2021
Balance		$ 1,998,461	$ 1,941,437
Balance		2,014,849	1,949,879
Cross Currency Swap [Member] | Accumulated Gain (Loss), Cash Flow Hedge, Including Noncontrolling Interest [Member] | Designated as Hedging Instrument [Member]
Balance		5,745	3,366
Gain or (loss) recognized in Other comprehensive income (loss)	[1]	(8,587)	(13,900)
Amount reclassified from Other comprehensive income (loss) into earnings		6,682	11,102
Balance		$ 3,840	$ 568
[1]	The amount of gain or (loss) recognized in Other comprehensive income (loss) for the years ended December 31, 2021 and 2020 is net of tax of $0.8 million and $1.1 million, respectively.

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	Mar. 31, 2022	Dec. 31, 2021
Finance liability - Dixie Valley	$ 245.2
HSBC Loan Agreement [Member]
Loans	46.8
Hapoalim Loan Agreement [Member]
Loans	117.8
Discount Loan Agreement [Member]
Loans	94
Olkaria III Plant 4 Loan - DEG 2 [Member]
Loans	34.4
Olkaria III plant 1 Loan - DEG 3 [Member]
Loans	30.3
Platanares Loan - OPIC [Member]
Loans	95.6	$ 98.2
Amatitlan Loan [Member]
Loans	18.6	19.8
Don A. Campbell 1 ("DAC1") [Member]
Notes	68	69.8
USG Prudential - NV [Member]
Notes	28.6	28.9
USG Prudential - ID [Member]
Notes	16.2	17.3
USG DOE [Member]
Notes	38.3	39.9
Senior Unsecured Bonds [Member]
Senior Unsecured debt	569.5	578.9
Senior Unsecured Loan [Member]
Senior Unsecured debt	193.5	204.3
Plumstriker Loan Agreement [Member]
Loans	14.5	14.8
Estimate of Fair Value Measurement [Member]
Finance liability - Dixie Valley	245.2	248.4
Other long-term debt	12.1	13.3
Estimate of Fair Value Measurement [Member] | HSBC Loan Agreement [Member]
Loans	46.8	50.4
Estimate of Fair Value Measurement [Member] | Hapoalim Loan Agreement [Member]
Loans	117.8	117.8
Estimate of Fair Value Measurement [Member] | Discount Loan Agreement [Member]
Loans	94	100.2
Estimate of Fair Value Measurement [Member] | Olkaria III OPIC [Member]
Loans	161.2	166.5
Estimate of Fair Value Measurement [Member] | Olkaria III Plant 4 Loan - DEG 2 [Member]
Loans	34.4	34.1
Estimate of Fair Value Measurement [Member] | Olkaria III plant 1 Loan - DEG 3 [Member]
Loans	30.3	30.1
Estimate of Fair Value Measurement [Member] | Platanares Loan - OPIC [Member]
Loans	95.6	98.2
Estimate of Fair Value Measurement [Member] | Amatitlan Loan [Member]
Loans	18.6	19.8
Estimate of Fair Value Measurement [Member] | OFC Two Senior Secured Notes [Member]
Notes	178.1	183.3
Estimate of Fair Value Measurement [Member] | Don A. Campbell 1 ("DAC1") [Member]
Notes	68	69.8
Estimate of Fair Value Measurement [Member] | USG Prudential - NV [Member]
Notes	28.6	28.9
Estimate of Fair Value Measurement [Member] | USG Prudential - ID [Member]
Notes	16.2	17.3
Estimate of Fair Value Measurement [Member] | USG DOE [Member]
Notes	38.3	39.9
Estimate of Fair Value Measurement [Member] | Senior Unsecured Bonds [Member]
Senior Unsecured debt	569.5	578.9
Estimate of Fair Value Measurement [Member] | Senior Unsecured Loan [Member]
Senior Unsecured debt	193.5	204.3
Estimate of Fair Value Measurement [Member] | Plumstriker Loan Agreement [Member]
Loans	14.5	14.8
Reported Value Measurement [Member]
Finance liability - Dixie Valley	249.1	252.9
Other long-term debt	12.6	13.6
Reported Value Measurement [Member] | HSBC Loan Agreement [Member]
Loans	46.4	50
Reported Value Measurement [Member] | Hapoalim Loan Agreement [Member]
Loans	116.1	116.1
Reported Value Measurement [Member] | Discount Loan Agreement [Member]
Loans	93.8	100
Reported Value Measurement [Member] | Olkaria III OPIC [Member]
Loans	152.2	156.7
Reported Value Measurement [Member] | Olkaria III Plant 4 Loan - DEG 2 [Member]
Loans	32.5	32.5
Reported Value Measurement [Member] | Olkaria III plant 1 Loan - DEG 3 [Member]
Loans	28.4	28.4
Reported Value Measurement [Member] | Platanares Loan - OPIC [Member]
Loans	86	88.1
Reported Value Measurement [Member] | Amatitlan Loan [Member]
Loans	18.4	19.3
Reported Value Measurement [Member] | OFC Two Senior Secured Notes [Member]
Notes	168.8	173.3
Reported Value Measurement [Member] | Don A. Campbell 1 ("DAC1") [Member]
Notes	66.3	67.9
Reported Value Measurement [Member] | USG Prudential - NV [Member]
Notes	26.1	26.3
Reported Value Measurement [Member] | USG Prudential - ID [Member]
Notes	16.5	17.3
Reported Value Measurement [Member] | USG DOE [Member]
Notes	34.1	35.5
Reported Value Measurement [Member] | Senior Unsecured Bonds [Member]
Senior Unsecured debt	532.9	539.6
Reported Value Measurement [Member] | Senior Unsecured Loan [Member]
Senior Unsecured debt	183.2	191.6
Reported Value Measurement [Member] | Plumstriker Loan Agreement [Member]
Loans	$ 14.4	$ 14.7

Note 5 - Fair Value of Financ_8

Note 5 - Fair Value of Financial Instruments - Fair Value of Financial Instruments (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Finance liability - Dixie Valley	$ 245.2
Deposits	16.2	$ 17.1
HSBC Loan Agreement [Member]
Loans	46.8
Olkaria III Loan DFC [Member]
Loans	161.2	166.5
Hapoalim Loan Agreement [Member]
Loans	117.8
Olkaria IV Loan - DEG 2 [Member]
Loans		34.1
Discount Loan Agreement [Member]
Loans	94
Olkaria IV Loan - DEG 3 [Member]
Loans		30.1
Platanares Loan - OPIC [Member]
Loans	95.6	98.2
Amatitlan Loan [Member]
Loans	18.6	19.8
Olkaria III Plant 4 Loan - DEG 2 [Member]
Loans	34.4
OFC Senior Secured Notes [Member]
Notes	178.1	183.3
Olkaria III plant 1 Loan - DEG 3 [Member]
Loans	30.3
Don A. Campbell 1 ("DAC1") [Member]
Notes	68	69.8
USG Prudential - NV [Member]
Notes	28.6	28.9
USG Prudential - ID [Member]
Notes	16.2	17.3
USG DOE [Member]
Notes	38.3	39.9
Senior Unsecured Bonds [Member]
Senior Unsecured debt	569.5	578.9
Senior Unsecured Loan [Member]
Senior Unsecured debt	193.5	204.3
Plumstriker Loan Agreement [Member]
Loans	14.5	14.8
Other Long-term Debt [Member]
Senior Unsecured debt	12.1	13.3
Fair Value, Inputs, Level 1 [Member]
Finance liability - Dixie Valley	0
Deposits	16.2	17.1
Fair Value, Inputs, Level 1 [Member] | HSBC Loan Agreement [Member]
Loans	0
Fair Value, Inputs, Level 1 [Member] | Olkaria III Loan DFC [Member]
Loans	0	0
Fair Value, Inputs, Level 1 [Member] | Hapoalim Loan Agreement [Member]
Loans	0
Fair Value, Inputs, Level 1 [Member] | Olkaria IV Loan - DEG 2 [Member]
Loans		0
Fair Value, Inputs, Level 1 [Member] | Discount Loan Agreement [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] | Olkaria III Plant 4 Loan - DEG 2 [Member]
Loans	0
Fair Value, Inputs, Level 1 [Member] | OFC Senior Secured Notes [Member]
Notes	0	0
Fair Value, Inputs, Level 1 [Member] | Olkaria III plant 1 Loan - DEG 3 [Member]
Loans	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]
Finance liability - Dixie Valley	0
Deposits	0	0
Fair Value, Inputs, Level 2 [Member] | HSBC Loan Agreement [Member]
Loans	0
Fair Value, Inputs, Level 2 [Member] | Olkaria III Loan DFC [Member]
Loans	0	0
Fair Value, Inputs, Level 2 [Member] | Hapoalim Loan Agreement [Member]
Loans	0
Fair Value, Inputs, Level 2 [Member] | Olkaria IV Loan - DEG 2 [Member]
Loans		0
Fair Value, Inputs, Level 2 [Member] | Discount Loan Agreement [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	18.6	19.8
Fair Value, Inputs, Level 2 [Member] | Olkaria III Plant 4 Loan - DEG 2 [Member]
Loans	0
Fair Value, Inputs, Level 2 [Member] | OFC Senior Secured Notes [Member]
Notes	0	0
Fair Value, Inputs, Level 2 [Member] | Olkaria III plant 1 Loan - DEG 3 [Member]
Loans	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	14.5	14.8
Fair Value, Inputs, Level 2 [Member] | Other Long-term Debt [Member]
Senior Unsecured debt	0	0
Fair Value, Inputs, Level 3 [Member]
Finance liability - Dixie Valley	245.2
Deposits	0	0
Fair Value, Inputs, Level 3 [Member] | HSBC Loan Agreement [Member]
Loans	46.8
Fair Value, Inputs, Level 3 [Member] | Olkaria III Loan DFC [Member]
Loans	161.2	166.5
Fair Value, Inputs, Level 3 [Member] | Hapoalim Loan Agreement [Member]
Loans	117.8
Fair Value, Inputs, Level 3 [Member] | Olkaria IV Loan - DEG 2 [Member]
Loans		34.1
Fair Value, Inputs, Level 3 [Member] | Discount Loan Agreement [Member]
Loans	94
Fair Value, Inputs, Level 3 [Member] | Olkaria IV Loan - DEG 3 [Member]
Loans		30.1
Fair Value, Inputs, Level 3 [Member] | Platanares Loan - OPIC [Member]
Loans	95.6	98.2
Fair Value, Inputs, Level 3 [Member] | Amatitlan Loan [Member]
Loans	0	0
Fair Value, Inputs, Level 3 [Member] | Olkaria III Plant 4 Loan - DEG 2 [Member]
Loans	34.4
Fair Value, Inputs, Level 3 [Member] | OFC Senior Secured Notes [Member]
Notes	178.1	183.3
Fair Value, Inputs, Level 3 [Member] | Olkaria III plant 1 Loan - DEG 3 [Member]
Loans	30.3
Fair Value, Inputs, Level 3 [Member] | Don A. Campbell 1 ("DAC1") [Member]
Notes	68	69.8
Fair Value, Inputs, Level 3 [Member] | USG Prudential - NV [Member]
Notes	28.6	28.9
Fair Value, Inputs, Level 3 [Member] | USG Prudential - ID [Member]
Notes	16.2	17.3
Fair Value, Inputs, Level 3 [Member] | USG DOE [Member]
Notes	38.3	39.9
Fair Value, Inputs, Level 3 [Member] | Senior Unsecured Bonds [Member]
Senior Unsecured debt	569.5	578.9
Fair Value, Inputs, Level 3 [Member] | Senior Unsecured Loan [Member]
Senior Unsecured debt	193.5	204.3
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	$ 12.1	$ 13.3

Note 6 - Stock-based Compensa_3

Note 6 - Stock-based Compensation (Details Textual) - The 2018 Incentive Compensation Plan [Member]	3 Months Ended
	Mar. 31, 2022$ / sharesshares
Stock Appreciation Rights (SARs) [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) | shares	513,385
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Exercise Price (in dollars per share)	$ 71.15
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)	$ 22.31
Stock Appreciation Rights (SARs) [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)	6 years
Restricted Stock Units (RSUs) [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) | shares	72,303
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)	$ 69.9
Performance Stock Units (PSU) [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) | shares	19,581
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)	$ 75.3
Stock Appreciation Rights (SARs), Restricted Stock Units (RSUs), and Performance Stock Units (PSU) [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)	1 year
Stock Appreciation Rights (SARs), Restricted Stock Units (RSUs), and Performance Stock Units (PSU) [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)	4 years

Note 6 - Stock-based Compensa_4

Note 6 - Stock-based Compensation - Fair Value of Stock-based Award on the Date of Grant (Details) - Stock Appreciation Rights (SARs), Restricted Stock Units (RSUs), and Performance Stock Units (PSU) [Member]	3 Months Ended
	Mar. 31, 2022
Dividend yield	0.67%
Minimum [Member]
Risk-free interest rates	1.30%
Expected life (in years) (Year)	2 years
Expected volatility (weighted average)	32.80%
Maximum [Member]
Risk-free interest rates	1.60%
Expected life (in years) (Year)	5 years 9 months
Expected volatility (weighted average)	46.10%

Note 7 - Interest Expense, Ne_2

Note 7 - Interest Expense, Net - Components of Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Interest related to sale of tax benefits	$ 3,431	$ 2,394
Interest expense	22,486	19,674
Less — amount capitalized	(4,836)	(3,052)
Total interest expense, net	$ 21,081	$ 19,016

Note 8 - Earnings Per Share (De

Note 8 - Earnings Per Share (Details Textual) - shares	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	207,400	298,700

Note 8 - Earnings Per Share - S

Note 8 - Earnings Per Share - Shares Used to Calculate Earnings Per Share (Details) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Weighted average number of shares used in computation of basic earnings per share: (in shares)	56,063	55,988
Additional shares from the assumed exercise of employee stock awards (in shares)	303	747
Weighted average number of shares used in computation of diluted earnings per share (in shares)	56,366	56,735

Note 9 - Business Segments (Det

Note 9 - Business Segments (Details Textual) $ in Thousands	3 Months Ended
	Mar. 31, 2022USD ($)	Mar. 31, 2021USD ($)	Dec. 31, 2021USD ($)
Number of Reportable Segments	3
Revenue from Contract with Customer, Including Assessed Tax	$ 183,710	$ 166,352
Goodwill, Ending Balance	90,591		$ 89,954
Electricity Segment [Member]
Revenue from Contract with Customer, Including Assessed Tax	162,525	144,988
Goodwill, Ending Balance	86,000		20,100
Electricity Segment [Member] | Accounting Standards Update 2014-09 [Member]
Revenue from Contract with Customer, Including Assessed Tax	22,800	19,200
Energy Storage and Management Services [Member]
Goodwill, Ending Balance	4,600		4,100
Product Segment [Member]
Revenue from Contract with Customer, Including Assessed Tax	14,628	$ 8,643
Goodwill, Ending Balance	$ 0		$ 0

Note 9 - Business Segments - Su

Note 9 - Business Segments - Summarized Financial Information Concerning Reportable Segments (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2022		Mar. 31, 2021		Dec. 31, 2021
Revenue		$ 183,710		$ 166,352
Operating income (loss)		45,078		49,889
Segment assets at period end		4,414,189	[1],[2]	3,859,213	[1],[2]	$ 4,425,678
Segment Reconciling Items [Member]
Revenue	[3]	0		0
Segment assets at period end		112,522		104,519
Electricity Segment [Member]
Revenue		162,525		144,988
Operating income (loss)		47,575		47,749
Segment assets at period end	[1],[2]	4,093,759		3,577,745
Electricity Segment [Member] | Segment Reconciling Items [Member]
Revenue	[3]	0		0
Segment assets at period end		112,522		104,519
Product Segment [Member]
Revenue		14,628		8,643
Operating income (loss)		(1,575)		(1,211)
Segment assets at period end	[1],[2]	140,957		140,039
Product Segment [Member] | Segment Reconciling Items [Member]
Revenue	[3]	20,903		25,334
Segment assets at period end		0		0
Other Segments [Member]
Revenue		6,557		12,721
Operating income (loss)		(922)		3,351
Segment assets at period end	[1],[2]	179,473		141,429
Other Segments [Member] | Segment Reconciling Items [Member]
Revenue	[3]	0		0
Segment assets at period end		0		0
UNITED STATES
Revenue	[4]	123,201		113,550
UNITED STATES | Electricity Segment [Member]
Revenue	[4]	116,109		98,976
UNITED STATES | Product Segment [Member]
Revenue	[4]	535		1,853
UNITED STATES | Other Segments [Member]
Revenue	[4]	6,557		12,721
Non-US [Member]
Revenue	[5]	60,509		52,802
Non-US [Member] | Electricity Segment [Member]
Revenue	[5]	46,416		46,012
Non-US [Member] | Product Segment [Member]
Revenue	[5]	14,093		6,790
Non-US [Member] | Other Segments [Member]
Revenue	[5]	$ 0		$ 0
[1]	Electricity segment assets include goodwill in the amount of $86.0 million and $20.1 million as of March 31, 2022 and 2021, respectively. Energy Storage segment assets include goodwill in the amount of $4.6 million and $4.1 as of March 31, 2022 and 2021, respectively. No goodwill is included in the Product segment assets as of March 31, 2022 and 2021.
[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 $22.8 million and $19.2 million for the three months ended March 31, 2022 and 2021, 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
	Mar. 31, 2022	Mar. 31, 2021
Revenue	$ 183,710	$ 166,352
Operating income (loss)	45,078	49,889
Interest income	342	263
Interest expense, net	(21,081)	(19,016)
Derivatives and foreign currency transaction gains (losses)	260	(16,866)
Income attributable to sale of tax benefits	7,705	6,355
Other non-operating income (expense), net	75	(331)
Total consolidated income before income taxes and equity in income of investees	32,379	20,294
Intersegment Eliminations [Member]
Revenue	20,903	25,334
Consolidation, Eliminations [Member]
Revenue	$ (20,903)	$ (25,334)

Note 10 - Commitments and Con_2

Note 10 - Commitments and Contingencies (Details Textual) - USD ($) $ in Thousands	Apr. 13, 2022	Sep. 14, 2021	Mar. 03, 2021	Mar. 29, 2016	Mar. 31, 2022	Dec. 31, 2021
Construction in Progress, Gross					$ 819,560	$ 721,483
Dixie Meadows PPA [Member]
Construction in Progress, Gross					$ 68,300
Former Local Sales Representative vs. Ormat [Member] | Pending Litigation [Member]
Loss Contingency, Damages Sought, Value				$ 4,600
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			$ 100,000
Avishai Shmuel Mano vs. Ormat [Member] | Subsequent Event [Member]
Loss Contingency, Damages Paid, Value	$ 10
Kipreos vs Ormat [Member]
Loss Contingency, Damages Sought, Value		$ 5,100

Note 11 - Income Taxes (Details

Note 11 - Income Taxes (Details Textual)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Effective Income Tax Rate Reconciliation, Percent, Total	31.40%	14.80%
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	May 02, 2022USD ($)$ / shares	Apr. 12, 2022USD ($)	Mar. 31, 2022USD ($)	Mar. 31, 2021USD ($)
Dividends, Common Stock, Total			$ 6,727	$ 6,718
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	May 16, 2022
Dividends Payable, Date to be Paid	May 31, 2022
Subsequent Event [Member] | Mizrahi Loan Agreement [Member]
Debt Instrument, Face Amount		$ 75,000
Debt Instrument, Number of Payments		16
Debt Instrument, Periodic Payment, Total		$ 4,700
Debt Instrument, Term (Year)		8 years
Debt Instrument, Interest Rate, Stated Percentage		4.10%
Debt Instrument, Covenant, Minimum Equity Capital		$ 750,000
Debt Instrument, Date of First Required Payment		Oct. 12, 2022
Subsequent Event [Member] | Mizrahi Loan Agreement [Member] | Maximum [Member]
Debt Instrument, Covenant, Debt to Adjusted EBITDA Ratio		6.00%
Subsequent Event [Member] | Mizrahi Loan Agreement [Member] | Minimum [Member]
Debt Instrument, Covenant, Equity Capital to Total Assets Ratio		25.00%