Segment financial information (Tables)

3 Months Ended

Mar. 31, 2020

Segment Reporting [Abstract]

Schedule of segment financial information

(in thousands)	Electric utility		Bank		Other		Total
Three months ended March 31, 2020
Revenues from external customers	$	597,430	$	79,738	$	18	$	677,186
Intersegment revenues (eliminations)	12		—		(12)		—
Revenues	$	597,442	$	79,738	$	6	$	677,186
Income (loss) before income taxes	$	29,686	$	18,969	$	(8,959)	$	39,696
Income taxes (benefit)	5,282		3,208		(2,687)		5,803
Net income (loss)	24,404		15,761		(6,272)		33,893
Preferred stock dividends of subsidiaries	499		—		(26)		473
Net income (loss) for common stock	$	23,905	$	15,761	$	(6,246)	$	33,420
Total assets (at March 31, 2020)	$	6,335,928	$	7,385,745	$	127,345	$	13,849,018
Three months ended March 31, 2019
Revenues from external customers	$	578,482	$	83,052	$	81	$	661,615
Intersegment revenues (eliminations)	13		—		(13)		—
Revenues	$	578,495	$	83,052	$	68	$	661,615
Income (loss) before income taxes	$	41,859	$	26,162	$	(9,982)	$	58,039
Income taxes (benefit)	9,234		5,323		(2,679)		11,878
Net income (loss)	32,625		20,839		(7,303)		46,161
Preferred stock dividends of subsidiaries	499		—		(26)		473
Net income (loss) for common stock	$	32,126	$	20,839	$	(7,277)	$	45,688
Total assets (at December 31, 2019)	$	6,388,682	$	7,233,017	$	123,552	$	13,745,251