Segment financial information (Tables)

3 Months Ended

Mar. 31, 2022

Segment Reporting [Abstract]

Schedule of segment financial information

(in thousands)	Electric utility		Bank		Other		Total
Three months ended March 31, 2022
Revenues from external customers	$	708,788	$	75,115	$	1,165	$	785,068
Intersegment revenues (eliminations)	4		—		(4)		—
Revenues	$	708,792	$	75,115	$	1,161	$	785,068
Income (loss) before income taxes	$	59,446	$	30,215	$	(2,181)	$	87,480
Income taxes (benefit)	12,538		6,345		(1,043)		17,840
Net income (loss)	46,908		23,870		(1,138)		69,640
Preferred stock dividends of subsidiaries	499		—		(26)		473
Net income (loss) for common stock	$	46,409	$	23,870	$	(1,112)	$	69,167
Total assets (at March 31, 2022)	$	6,535,176	$	9,252,325	$	120,928	$	15,908,429
Three months ended March 31, 2021
Revenues from external customers	$	564,855	$	77,131	$	960	$	642,946
Intersegment revenues (eliminations)	9		—		(9)		—
Revenues	$	564,864	$	77,131	$	951	$	642,946
Income (loss) before income taxes	$	55,090	$	37,102	$	(11,996)	$	80,196
Income taxes (benefit)	11,233		7,546		(3,414)		15,365
Net income (loss)	43,857		29,556		(8,582)		64,831
Preferred stock dividends of subsidiaries	499		—		(26)		473
Net income (loss) for common stock	$	43,358	$	29,556	$	(8,556)	$	64,358
Total assets (at December 31, 2021)	$	6,491,625	$	9,181,603	$	149,409	$	15,822,637