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Note 8 - Fair Value of Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

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

						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 (including cash equivalents)			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	)

						December 31, 2020
						Fair Value
		Carrying Value at December 31, 2020				Total				Level 1				Level 2				Level 3
		(Dollars in thousands)
Assets
Current assets:
Cash equivalents (including restricted cash accounts)		$	28,653			$	28,653			$	28,653			$	—			$	—
Derivatives:
Contingent receivable ⁽¹⁾			111				111				—				—				111
Currency forward contracts ⁽²⁾			1,554				1,554				—				1,554				—
Long-term assets:
Cross currency swap ⁽³⁾			27,829				27,829				—				27,829				—
Liabilities:
Current liabilities:
Derivatives:
Contingent payables ⁽¹⁾			(549	)			(549	)			—				—				(549	)
Cross currency swap ⁽³⁾			(2,283	)			(2,283	)			—				(2,283	)			—
Long-term liabilities:
Contingent payables ⁽¹⁾			(2,630	)			(2,630	)			—				—				(2,630	)
		$	52,685			$	52,685			$	28,653			$	27,100			$	(3,068	)

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

Derivatives not designated as hedging instruments		Location of recognized gain (loss)		Amount of recognized gain (loss)
				2021				2020				2019
				(Dollars in thousands)
Swap transaction on RRS prices ⁽¹⁾		Derivative and foreign currency transaction gains (losses)		$	(14,540	)		$	—			$	—
Currency forward contracts ⁽¹⁾		Derivative and foreign currency transaction gains (losses)			1,368				5,175				2,556
				$	(13,172	)		$	5,175			$	2,556

Derivatives designated as cash flow hedging instruments

Cross currency swap ⁽²⁾		Derivative and foreign currency transaction gains (losses)		$	10,501			$	21,187			$	—

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

		Year Ended December 31,
		2021				2020
		(Dollars in thousands)
Cross currency swap cash flow hedge:
Balance in Other comprehensive income (loss) beginning of period		$	3,366			$	—
Gain or (loss) recognized in Other comprehensive income (loss) ⁽¹⁾			12,880				24,533
Amount reclassified from Other comprehensive income (loss) into earnings			(10,501	)			(21,187	)
Balance in Other comprehensive income (loss) end of period		$	5,745			$	3,366

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

		Fair Value								Carrying Amount
		2021				2020				2021				2020
		(Dollars in millions)								(Dollars in millions)
HSBC Loan		$	50.4			$	—			$	50.0			$	—
Hapoalim Loan			117.8				—				116.1				—
Discount Loan			100.2				—				100.0				—
Financing Liability - Dixie Valley			248.4				—				252.9				—
Olkaria III Loan - DFC			166.5				192.5				156.7				174.7
Olkaria III plant 4 Loan - DEG 2			34.1				40.4				32.5				37.5
Olkaria III plant 1 Loan - DEG 3			30.1				35.8				28.4				32.8
Platanares Loan - DFC			98.2				112.1				88.1				96.3
Amatitlan Loan		19.8					23.5				19.3				22.8
OFC 2 LLC Senior Secured Notes ("OFC 2")			183.3				207.9				173.3				188.2
Don A. Campbell 1 Senior Secured Notes ("DAC 1")			69.8				78.5				67.9				73.1
USG Prudential - NV			28.9				31.8				26.3				27.6
USG Prudential - ID			17.3				18.3				17.3				18.4
USG DOE			39.9				45.1				35.5				38.2
Senior Unsecured Bonds			578.9				585.1				539.6				529.1
Senior Unsecured Loan			204.3				222.2				191.6				200.0
Plumstriker			14.8				18.1				14.7				18.1
Other long-term debt			13.3				17.4				13.6				17.6

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

		Level 1				Level 2				Level 3				Total
		(Dollars in millions)
HSBC Loan		$	—			$	—			$	50.4			$	50.4
Hapoalim Loan			—				—				117.8				117.8
Discount Loan			—				—				100.2				100.2
Financing Liability - Dixie Valley			—				—				248.4				248.4
Olkaria III - DFC			—				—				166.5				166.5
Olkaria III plant 4 - DEG 2			—				—				34.1				34.1
Olkaria III plant 1 - DEG 3			—				—				30.1				30.1
Platanares Loan - DFC			—				—				98.2				98.2
Amatitlan Loan			—				19.8				—				19.8
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

		Level 1				Level 2				Level 3				Total
		(Dollars in millions)
Olkaria III Loan - DFC		$	—			$	—			$	192.5			$	192.5
Olkaria III plant 4 - DEG 2			—				—				40.4				40.4
Olkaria III plant 1 - DEG 3			—				—				35.8				35.8
Platanares Loan - DFC			—				—				112.1				112.1
Amatitlan Loan			—				23.5				—				23.5
Senior Secured Notes:
OFC 2 Senior Secured Notes			—				—				207.9				207.9
DAC 1 Senior Secured Notes			—				—				78.5				78.5
USG Prudential - NV			—				—				31.8				31.8
USG Prudential - ID			—				—				18.3				18.3
USG DOE			—				—				45.1				45.1
Senior Unsecured Bonds			—				—				585.1				585.1
Senior Unsecured Loan			—				—				222.2				222.2
Plumstriker			—				18.1				—				18.1
Other long-term debt			—				—				17.4				17.4
Deposits			14.8				—				—				14.8