Consolidated Statements of Changes in Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Class B [Member]	Common Stock [Member] Common Class A [Member]	Common Stock [Member] Common Class B [Member]	Retained Earnings [Member]	Additional Paid-in Capital [Member]	Accumulated other comprehensive loss [Member]	Non-Controlling Interest [Member]	Treasury stock [Member]	Treasury stock [Member] Common Class A [Member]
Begining Balance at Dec. 31, 2022	$ 1,696,697		$ 26	$ 82	$ 12,009	$ 464,721	$ 515	$ 1,219,344
Beginning Balance, shares at Dec. 31, 2022	108,275,556	82,021,389	26,254,167	82,021,389					0	0
Net income	$ 30,739				6,844			23,895
Other comprehensive income	(1,265)						(307)	(958)
Long-term incentive compensation	357					86		271
Class A dividends - $0.025 per share	(663)				(663)
EELP Distributions to Class B Interests	(2,051)							(2,051)
Minority owner contribution - Albania Power Project	337							337
Ending Balance at Mar. 31, 2023	$ 1,724,151		$ 26	$ 82	18,190	464,807	208	1,240,838
Ending Balance, shares at Mar. 31, 2023	108,275,556	82,021,389	26,254,167	82,021,389					0	0
Begining Balance at Dec. 31, 2023	$ 1,809,354		$ 26	$ 82	39,754	465,551	505	1,303,908	$ (472)
Beginning Balance, shares at Dec. 31, 2023	108,284,792	82,021,389	26,284,027	82,021,389					20,624	20,624
Net income	$ 28,140				6,324			21,816
Other comprehensive income	2,261						547	1,714
Long-term incentive compensation	1,377					330		1,047
Class A dividends - $0.025 per share	(673)				(673)
EELP Distributions to Class B Interests	(2,051)							(2,051)
Minority owner contribution - Albania Power Project	$ 209							209
Restricted stock units vested, shares	55,764	0	95,466						39,702	39,702
Repurchase of Class A Common Stock, value	$ (9,347)								$ (9,347)
Repurchase of Class A Common Stock, shares									588,030
Restricted stock units vested	$ (858)								$ (858)
Shares withheld for taxes	(13,301)	0	(13,301)							0
Shares withheld for taxes	$ (214)					(214)
Ending Balance at Mar. 31, 2024	$ 1,828,198		$ 26	$ 82	$ 45,405	$ 465,667	$ 1,052	$ 1,326,643	$ (10,677)
Ending Balance, shares at Mar. 31, 2024	107,739,225	82,021,389	26,366,192	82,021,389					648,356	648,356