Segment financial information (Tables)

9 Months Ended

Sep. 30, 2020

Segment Reporting [Abstract]

Schedule of segment financial information

(in thousands)	Electric utility		Bank		Other		Total
Three months ended September 30, 2020
Revenues from external customers	$	562,559	$	78,644	$	224	$	641,427
Intersegment revenues (eliminations)	9		—		(9)		—
Revenues	$	562,568	$	78,644	$	215	$	641,427
Income (loss) before income taxes	$	74,398	$	15,027	$	(9,904)	$	79,521
Income taxes (benefit)	13,835		2,877		(2,694)		14,018
Net income (loss)	60,563		12,150		(7,210)		65,503
Preferred stock dividends of subsidiaries	498		—		(27)		471
Net income (loss) for common stock	$	60,065	$	12,150	$	(7,183)	$	65,032
Nine months ended September 30, 2020
Revenues from external customers	$	1,694,195	$	233,096	$	267	$	1,927,558
Intersegment revenues (eliminations)	30		—		(30)		—
Revenues	$	1,694,225	$	233,096	$	237	$	1,927,558
Income (loss) before income taxes	$	157,111	$	51,330	$	(28,994)	$	179,447
Income taxes (benefit)	29,316		9,405		(8,030)		30,691
Net income (loss)	127,795		41,925		(20,964)		148,756
Preferred stock dividends of subsidiaries	1,496		—		(79)		1,417
Net income (loss) for common stock	$	126,299	$	41,925	$	(20,885)	$	147,339
Total assets (at September 30, 2020)	$	6,322,304	$	8,075,745	$	144,312	$	14,542,361
Three months ended September 30, 2019
Revenues from external customers	$	688,299	$	82,548	$	35	$	770,882
Intersegment revenues (eliminations)	31		—		(31)		—
Revenues	$	688,330	$	82,548	$	4	$	770,882
Income (loss) before income taxes	$	58,099	$	29,157	$	(8,563)	$	78,693
Income taxes (benefit)	10,822		6,269		(2,288)		14,803
Net income (loss)	47,277		22,888		(6,275)		63,890
Preferred stock dividends of subsidiaries	498		—		(27)		471
Net income (loss) for common stock	$	46,779	$	22,888	$	(6,248)	$	63,419
Nine months ended September 30, 2019
Revenues from external customers	$	1,900,552	$	247,287	$	143	$	2,147,982
Intersegment revenues (eliminations)	57		—		(57)		—
Revenues	$	1,900,609	$	247,287	$	86	$	2,147,982
Income (loss) before income taxes	$	140,775	$	76,611	$	(27,960)	$	189,426
Income taxes (benefit)	27,800		15,868		(7,278)		36,390
Net income (loss)	112,975		60,743		(20,682)		153,036
Preferred stock dividends of subsidiaries	1,496		—		(79)		1,417
Net income (loss) for common stock	$	111,479	$	60,743	$	(20,603)	$	151,619
Total assets (at December 31, 2019)	$	6,388,682	$	7,233,017	$	123,552	$	13,745,251