LEASES (Tables)

12 Months Ended

Dec. 31, 2025

Leases [Abstract]

Schedule of Total Lease Cost

The table below presents the effects on the amounts relating to total lease cost:

	Year Ended December 31,
	2025		2024		2023
	(Dollars in thousands)
Lease cost:
Finance lease cost:
Amortization of right-of-use assets	$	1,821	$	1,388	$	1,922
Interest on lease liabilities	206		143		168
Operating lease cost	6,665		5,657		4,771
Short-term and variable lease cost	10,220		6,738		6,741
Total lease cost	$	18,912	$	13,926	$	13,602
Other information:
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows for finance leases	$	206	$	143	$	168
Operating cash flows for operating leases	7,909		10,526		4,448
Financing cash flows for finance leases	1,840		1,383		1,963
Right-of-use assets obtained in exchange for new finance lease liabilities	3,677		761		1,671

Right-of-use assets obtained in exchange for new operating lease liabilities	12,174		12,599		4,731
	December 31,
Additional information as of the end of the year:	2025		2024
Weighted-average remaining lease term — finance leases (in years)	12.3		13.4
Weighted-average remaining lease term — operating leases (in years)	14.9		16.3
Weighted-average discount rate — finance leases (in percentage)	6	%	6	%
Weighted-average discount rate — operating leases (in percentage)	5	%	5	%

Schedule of Future Minimum Lease Payments Under Finance Lease

Future minimum lease payments under non-cancellable leases as of December 31, 2025 were as follows:

	Operating Leases		Finance Leases		Financing Liability (1)
	(Dollars in thousands)
Year ending December 31,
2026	$	6,098	$	551	$	22,675
2027	4,879		1,885		20,815
2028	3,914		1,127		20,578
2029	3,211		938		23,165
2030	2,477		399		19,856
Thereafter	30,608		29		230,986
Total future minimum lease payments	51,187		4,929		338,075
Less imputed interest	16,663		402		121,679
Total	$	34,524	$	4,527	$	216,396

(1) Financing liability was assumed as part of the Terra-Gen business combination transaction in 2021 as further described under Note 11 to the consolidated financial statements, and is related to the sale and lease-back transaction of the Dixie Valley geothermal assets.

Schedule of Future Minimum Lease Payments Under Operating Lease

Future minimum lease payments under non-cancellable leases as of December 31, 2025 were as follows:

	Operating Leases		Finance Leases		Financing Liability (1)
	(Dollars in thousands)
Year ending December 31,
2026	$	6,098	$	551	$	22,675
2027	4,879		1,885		20,815
2028	3,914		1,127		20,578
2029	3,211		938		23,165
2030	2,477		399		19,856
Thereafter	30,608		29		230,986
Total future minimum lease payments	51,187		4,929		338,075
Less imputed interest	16,663		402		121,679
Total	$	34,524	$	4,527	$	216,396

(1) Financing liability was assumed as part of the Terra-Gen business combination transaction in 2021 as further described under Note 11 to the consolidated financial statements, and is related to the sale and lease-back transaction of the Dixie Valley geothermal assets.

Schedule of Lease Income

The table below presents lease income recognized as a lessor:

	Year Ended December 31,
	2025		2024		2023
	(Dollars in thousands)
Lease income relating to lease payments of operating leases	$	569,120	$	553,348	$	542,065