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Note 5 - Fair Value of Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2021

Notes Tables

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

						June 30, 2021
						Fair Value
		Carrying Value at June 30, 2021				Total				Level 1				Level 2				Level 3
		(Dollars in thousands)
Assets:
Current assets:
Cash equivalents (including restricted cash accounts)		$	30,410			$	30,410			$	30,410			$	—			$	—
Marketable securities (including cash equivalents)			63,012				63,012				63,012				—				—
Derivatives:
Currency forward contracts ⁽²⁾			458				458				—				458				—
Long-term Assets:
Cross currency swap ⁽³⁾			19,316				19,316				—				19,316				—
Liabilities:
Current liabilities:
Derivatives:
Cross currency swap ⁽³⁾			(562	)			(562	)			—				(562	)			—
Long term liabilities:
Contingent payables ⁽¹⁾			(2,550	)			(2,550	)			—				—				(2,550	)
		$	110,084			$	110,084			$	93,422			$	19,212			$	(2,550	)

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

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

				Amount of recognized gain (loss)								Amount of recognized gain (loss)
Derivatives not designated as hedging instruments		Location of recognized gain (loss)		Three Months Ended June 30,								Six Months Ended June 30,
				2021				2020				2021				2020
				(Dollars in thousands)								(Dollars in thousands)
Swap transaction on RRS prices ⁽¹⁾		Derivative and foreign currency transaction gains (losses)		$	—			$	—				(14,540	)			—
Currency forward contracts ⁽¹⁾		Derivative and foreign currency transaction gains (losses)		$	1,200			$	1,435			$	(269	)		$	2,525

Derivatives designated as cash flow hedging instruments

Cross currency swap ⁽²⁾		Derivative and foreign currency transaction gains (losses)		$	6,808			$	—			$	(4,294	)		$	—

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

		Three Months Ended June 30,								Six Months Ended June 30,
		2021				2020				2021				2020
		(Dollars in thousands)								(Dollars in thousands)
Cross currency swap cash flow hedge:
Balance in Other comprehensive income (loss) beginning of period		$	568			$	—			$	3,366			$	—
Gain or (loss) recognized in Other comprehensive income (loss)			7,006				—				(6,894	)			—
Amount reclassified from Other comprehensive income (loss) into earnings			(6,808	)			—				4,294				—
Balance in Other comprehensive income (loss) end of period		$	766			$	—			$	766			$	—

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

		Fair Value								Carrying Amount
		June 30, 2021				December 31, 2020				June 30, 2021				December 31, 2020
		(Dollars in millions)								(Dollars in millions)
Olkaria III Loan - DFC		$	179.3			$	192.5			$	165.7			$	174.7
Olkaria III plant 4 Loan - DEG 2			37.8				40.4				35.0				37.5
Olkaria III plant 1 Loan - DEG 3			33.3				35.8				30.6				32.8
Platanares Loan - DFC			104.6				112.1				92.2				96.3
Amatitlan Loan			21.7				23.5				21.0				22.8
Senior Secured Notes:
OFC 2 LLC ("OFC 2")			193.4				207.9				179.8				188.2
Don A. Campbell 1 ("DAC 1")			72.9				78.5				70.0				73.1
USG Prudential - NV			29.8				31.8				27.1				27.6
USG Prudential - ID			17.4				18.3				17.6				18.4
USG DOE			42.0				45.1				36.8				38.2
Senior Unsecured Bonds			570.4				585.1				524.8				529.1
Senior Unsecured Loan			216.5				222.2				200.0				200.0
Plumstriker			16.6				18.1				16.5				18.1
Other long-term debt			15.7				17.4				16.0				17.6

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

		Level 1				Level 2				Level 3				Total
		(Dollars in millions)
Olkaria III - DFC		$	—			$	—			$	179.3			$	179.3
Olkaria III plant 4 Loan - DEG 2			—				—				37.8				37.8
Olkaria III plant 1 Loan - DEG 3			—				—				33.3				33.3
Platanares Loan - DFC			—				—				104.6				104.6
Amatitlan Loan			—				21.7				—				21.7
Senior Secured Notes:
OFC 2 Senior Secured Notes			—				—				193.4				193.4
DAC 1 Senior Secured Notes			—				—				72.9				72.9
USG Prudential - NV			—				—				29.8				29.8
USG Prudential - ID			—				—				17.4				17.4
USG DOE			—				—				42.0				42.0
Senior Unsecured Bonds			—				—				570.4				570.4
Senior Unsecured Loan			—				—				216.5				216.5
Plumstriker			—				16.6				—				16.6
Other long-term debt			—				—				15.7				15.7
Deposits			14.2				—				—				14.2

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