Segment financial information (Tables)

9 Months Ended

Sep. 30, 2024

Segment Reporting [Abstract]

Schedule of Segment Financial Information

(in thousands)	Electric utility		Bank		Other		Total
Three months ended September 30, 2024
Revenues	$	829,617	$	105,144	$	3,622	$	938,383
Income (loss) before income taxes	$	(117,526)	$	23,429	$	(55,137)	$	(149,234)
Income taxes (benefit)	(35,439)		4,651		(14,515)		(45,303)
Net income (loss)	(82,087)		18,778		(40,622)		(103,931)
Preferred stock dividends of subsidiaries	498		—		(27)		471
Net income (loss) for common stock	$	(82,585)	$	18,778	$	(40,595)	$	(104,402)
Nine months ended September 30, 2024
Revenues	$	2,410,526	$	312,231	$	10,144	$	2,732,901
Income (loss) before income taxes	$	(1,725,279)	$	(7,864)	$	(104,102)	$	(1,837,245)
Income taxes (benefit)	(454,017)		(1,789)		(25,092)		(480,898)
Net income (loss)	(1,271,262)		(6,075)		(79,010)		(1,356,347)
Preferred stock dividends of subsidiaries	1,496		—		(79)		1,417
Net income (loss) for common stock	$	(1,272,758)	$	(6,075)	$	(78,931)	$	(1,357,764)
Total assets (at September 30, 2024)	$	7,563,204	$	9,267,846	$	900,178	$	17,731,228
Three months ended September 30, 2023
Revenues	$	794,987	$	100,974	$	5,912	$	901,873
Income (loss) before income taxes	$	55,415	$	12,749	$	(19,054)	$	49,110
Income taxes (benefit)	11,456		1,384		(5,319)		7,521
Net income (loss)	43,959		11,365		(13,735)		41,589
Preferred stock dividends of subsidiaries	498		—		(27)		471
Net income (loss) for common stock	$	43,461	$	11,365	$	(13,708)	$	41,118
Nine months ended September 30, 2023
Revenues	$	2,419,539	$	291,716	$	14,540	$	2,725,795
Income (loss) before income taxes	$	175,391	$	61,511	$	(48,121)	$	188,781
Income taxes (benefit)	38,126		11,380		(12,591)		36,915
Net income (loss)	137,265		50,131		(35,530)		151,866
Preferred stock dividends of subsidiaries	1,496		—		(79)		1,417
Net income (loss) for common stock	$	135,769	$	50,131	$	(35,451)	$	150,449
Total assets (at December 31, 2023)	$	7,283,554	$	9,673,192	$	287,075	$	17,243,821