Segment financial information (Tables)

9 Months Ended

Sep. 30, 2023

Segment Reporting [Abstract]

Schedule of Segment Financial Information

(in thousands)	Electric utility		Bank		Other		Total
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 September 30, 2023)	$	7,078,447	$	9,657,428	$	255,943	$	16,991,818
Three months ended September 30, 2022
Revenues	$	955,971	$	81,411	$	4,815	$	1,042,197
Income (loss) before income taxes	$	63,712	$	27,281	$	(11,088)	$	79,905
Income taxes (benefit)	13,450		6,525		(2,623)		17,352
Net income (loss)	50,262		20,756		(8,465)		62,553
Preferred stock dividends of subsidiaries	498		—		(27)		471
Net income (loss) for common stock	$	49,764	$	20,756	$	(8,438)	$	62,082
Nine months ended September 30, 2022
Revenues from external customers and other sources	$	2,483,632	$	231,850	$	7,390	$	2,722,872
Intersegment revenues (eliminations)	4		—		(4)		—
Revenues	$	2,483,636	$	231,850	$	7,386	$	2,722,872
Income (loss) before income taxes	$	179,771	$	79,605	$	(25,774)	$	233,602
Income taxes (benefit)	37,967		17,513		(7,085)		48,395
Net income (loss)	141,804		62,092		(18,689)		185,207
Preferred stock dividends of subsidiaries	1,496		—		(79)		1,417
Net income (loss) for common stock	$	140,308	$	62,092	$	(18,610)	$	183,790
Total assets (at December 31, 2022)	$	6,597,467	$	9,545,970	$	140,807	$	16,284,244