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Note 4 - Fair Value of Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2023

Notes Tables

Fair Value, by Balance Sheet Grouping [Table Text Block]

						June 30, 2023
						Fair Value
		Carrying Value at June 30, 2023				Total				Level 1				Level 2				Level 3
		(Dollars in thousands)
Assets:
Current assets:
Cash equivalents (including restricted cash accounts)		$	41,237			$	41,237			$	41,237			$	—			$	—
Marketable securities ⁽³⁾			139				139				139				—				—
Long-term Assets:
Cross currency swap ⁽²⁾			9				9				—				9				—
Liabilities:
Current liabilities:
Derivatives:
Cross currency swap ⁽²⁾			(4,189	)			(4,189	)			—				(4,189	)			—
Currency forward contracts ⁽¹⁾			(1,391	)			(1,391	)			—				(1,391	)			—
Long term liabilities:
Cross currency swap ⁽²⁾			(9,208	)			(9,208	)			—				(9,208	)			—
		$	26,597			$	26,597			$	41,376			$	(14,779	)		$	—

						December 31, 2022
						Fair Value
		Carrying Value at December 31, 2022				Total				Level 1				Level 2				Level 3
		(Dollars in thousands)
Assets
Current assets:
Cash equivalents (including restricted cash accounts)		$	34,832			$	34,832			$	34,832			$	—			$	—
Marketable securities ⁽³⁾			136				136				136				—				—
Derivatives:
Long-term assets:
Cross currency swap ⁽²⁾			3,029				3,029				—				3,029				—
Liabilities:
Current liabilities:
Derivatives:
Currency forward contracts ⁽¹⁾			(800	)			(800	)			—				(800	)			—
Cross currency swap ⁽²⁾			(2,777	)			(2,777	)			—				(2,777	)			—
		$	34,420			$	34,420			$	34,968			$	(548	)		$	—

Derivative Instruments, Gain (Loss) [Table Text Block]

				Amount of recognized gain (loss)								Amount of recognized gain (loss)
Derivatives not designated as hedging instruments		Location of recognized gain (loss)		Three Months Ended June 30,								Six Months Ended June 30,
				2023				2022				2023				2022
				(Dollars in thousands)								(Dollars in thousands)
Currency forward contracts ⁽¹⁾		Derivative and foreign currency transaction gains (losses)		$	(1,071	)		$	(4,498	)		$	(2,727	)		$	(4,706	)

Derivatives designated as cash flow hedging instruments

Cross currency swap ⁽²⁾		Derivative and foreign currency transaction gains (losses)		$	(3,761	)		$	(28,733	)		$	(10,553	)		$	(35,415	)

Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block]

		Three Months Ended June 30,								Six Months Ended June 30,
		2023				2022				2023				2022
		(Dollars in thousands)								(Dollars in thousands)
Cross currency swap cash flow hedge:
Balance in Accumulated other comprehensive income (loss) beginning of period		$	(1,483	)		$	3,840			$	3,920			$	5,745
Gain or (loss) recognized in Other comprehensive income (loss)			6,238				(30,828	)			7,627				(39,415	)
Amount reclassified from Other comprehensive income (loss) into earnings			(3,761	)			28,733				(10,553	)			35,415
Balance in Accumulated other comprehensive income (loss) end of period		$	994			$	1,745			$	994			$	1,745

Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block]

		Fair Value								Carrying Amount *^()**
		June 30, 2023				December 31, 2022				June 30, 2023				December 31, 2022
		(Dollars in millions)								(Dollars in millions)
Mizrahi Loan		$	66.1			$	71.4			$	65.6			$	70.3
Convertible Senior Notes			467.6				505.3				431.3				431.3
HSBC Loan			36.9				40.3				39.3				42.9
Hapoalim Loan			82.7				91.1				89.3				98.2
Hapoalim Loan 2023			104.8				—				100.0				—
Discount Loan			75.2				81.1				81.3				87.5
Finance liability - Dixie Valley			215.2				219.8				236.1				242.0
Olkaria III Loan - DFC			124.8				134.2				129.7				138.7
Olkaria III plant 4 Loan - DEG 2			23.9				26.5				25.0				27.5
Olkaria III plant 1 Loan - DEG 3			21.1				23.3				21.8				24.0
Platanares Loan - DFC			75.5				80.2				75.8				79.9
Amatitlan Loan			14.1				14.7				14.0				15.8
OFC 2 LLC ("OFC 2")			140.6				149.8				149.3				158.0
Don A. Campbell 1 ("DAC 1")			54.2				57.4				59.6				62.7
USG Prudential - NV			23.3				23.7				24.6				25.0
USG Prudential - ID			55.4				56.8				59.8				61.6
USG DOE			31.3				32.8				31.5				32.8
Senior Unsecured Bonds			196.8				235.1				216.2				255.8
Senior Unsecured Loan			157.6				166.4				166.4				174.8
Plumstriker			—				11.2				—				11.4
Other long-term debt			8.0				9.2				8.6				10.4

Fair Value, Liabilities Measured on Recurring and Nonrecurring Basis [Table Text Block]

		Level 1				Level 2				Level 3				Total
		(Dollars in millions)
Mizrahi Loan		$	—			$	—			$	66.1			$	66.1
Convertible Senior Notes			—				467.6				—				467.6
HSBC Loan			—				—				36.9				36.9
Hapoalim Loan			—				—				82.7				82.7
Hapoalim Loan 2023			—				—				104.8				104.8
Discount Loan			—				—				75.2				75.2
Finance liability - Dixie Valley			—				—				215.2				215.2
Olkaria III Loan - DFC			—				—				124.8				124.8
Olkaria III plant 4 Loan - DEG 2			—				—				23.9				23.9
Olkaria III plant 1 Loan - DEG 3			—				—				21.1				21.1
Platanares Loan - DFC			—				—				75.5				75.5
Amatitlan Loan			—				14.1				—				14.1
OFC 2 Senior Secured Notes			—				—				140.6				140.6
DAC 1 Senior Secured Notes			—				—				54.2				54.2
USG Prudential - NV			—				—				23.3				23.3
USG Prudential - ID			—				—				55.4				55.4
USG DOE			—				—				31.3				31.3
Senior Unsecured Bonds			—				—				196.8				196.8
Senior Unsecured Loan			—				—				157.6				157.6
Other long-term debt			—				—				8.0				8.0
Deposits		19.2					—				—				19.2

		Level 1				Level 2				Level 3				Total
		(Dollars in millions)
Mizrahi Loan		$	—			$	—			$	71.4			$	71.4
Convertible Senior Notes			—				505.3				—				505.3
HSBC Loan			—				—				40.3				40.3
Hapoalim Loan			—				—				91.1				91.1
Discount Loan			—				—				81.1				81.1
Financing Liability - Dixie Valley			—				—				219.8				219.8
Olkaria III Loan - DFC			—				—				134.2				134.2
Olkaria IV - DEG 2			—				—				26.5				26.5
Olkaria IV - DEG 3			—				—				23.3				23.3
Platanares Loan - DFC			—				—				80.2				80.2
Amatitlan Loan			—				14.7				—				14.7
OFC 2 Senior Secured Notes			—				—				149.8				149.8
DAC 1 Senior Secured Notes			—				—				57.4				57.4
USG Prudential - NV			—				—				23.7				23.7
USG Prudential - ID			—				—				56.8				56.8
USG DOE			—				—				32.8				32.8
Senior Unsecured Bonds			—				—				235.1				235.1
Senior Unsecured Loan			—				—				166.4				166.4
Plumstriker			—				11.2				—				11.2
Other long-term debt			—				—				9.2				9.2
Deposits			13.9				—				—				13.9