Segment financial information (Tables)

6 Months Ended

Jun. 30, 2020

Segment Reporting [Abstract]

Schedule of segment financial information

(in thousands)	Electric utility		Bank		Other		Total
Three months ended June 30, 2020
Revenues from external customers	$	534,206	$	74,714	$	25	$	608,945
Intersegment revenues (eliminations)	9		—		(9)		—
Revenues	$	534,215	$	74,714	$	16	$	608,945
Income (loss) before income taxes	$	53,027	$	17,334	$	(10,131)	$	60,230
Income taxes (benefit)	10,199		3,320		(2,649)		10,870
Net income (loss)	42,828		14,014		(7,482)		49,360
Preferred stock dividends of subsidiaries	499		—		(26)		473
Net income (loss) for common stock	$	42,329	$	14,014	$	(7,456)	$	48,887
Six months ended June 30, 2020
Revenues from external customers	$	1,131,636	$	154,452	$	43	$	1,286,131
Intersegment revenues (eliminations)	21		—		(21)		—
Revenues	$	1,131,657	$	154,452	$	22	$	1,286,131
Income (loss) before income taxes	$	82,713	$	36,303	$	(19,090)	$	99,926
Income taxes (benefit)	15,481		6,528		(5,336)		16,673
Net income (loss)	67,232		29,775		(13,754)		83,253
Preferred stock dividends of subsidiaries	998		—		(52)		946
Net income (loss) for common stock	$	66,234	$	29,775	$	(13,702)	$	82,307
Total assets (at June 30, 2020)	$	6,332,007	$	8,019,665	$	129,028	$	14,480,700
Three months ended June 30, 2019
Revenues from external customers	$	633,771	$	81,687	$	27	$	715,485
Intersegment revenues (eliminations)	13		—		(13)		—
Revenues	$	633,784	$	81,687	$	14	$	715,485
Income (loss) before income taxes	$	40,817	$	21,292	$	(9,415)	$	52,694
Income taxes (benefit)	7,744		4,276		(2,311)		9,709
Net income (loss)	33,073		17,016		(7,104)		42,985
Preferred stock dividends of subsidiaries	499		—		(26)		473
Net income (loss) for common stock	$	32,574	$	17,016	$	(7,078)	$	42,512
Six months ended June 30, 2019
Revenues from external customers	$	1,212,253	$	164,739	$	108	$	1,377,100
Intersegment revenues (eliminations)	26		—		(26)		—
Revenues	$	1,212,279	$	164,739	$	82	$	1,377,100
Income (loss) before income taxes	$	82,676	$	47,454	$	(19,397)	$	110,733
Income taxes (benefit)	16,978		9,599		(4,990)		21,587
Net income (loss)	65,698		37,855		(14,407)		89,146
Preferred stock dividends of subsidiaries	998		—		(52)		946
Net income (loss) for common stock	$	64,700	$	37,855	$	(14,355)	$	88,200
Total assets (at December 31, 2019)	$	6,388,682	$	7,233,017	$	123,552	$	13,745,251