Segment financial information (Tables)

9 Months Ended

Sep. 30, 2019

Segment Reporting [Abstract]

Schedule of segment financial information

(in thousands)	Electric utility		Bank		Other			Total
Three months ended September 30, 2019
Revenues from external customers	$	688,299	$	83,201	$	35		$	771,535
Intersegment revenues (eliminations)	31		—		(31		)	—
Revenues	$	688,330	$	83,201	$	4		$	771,535
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	$	247,940	$	143		$	2,148,635
Intersegment revenues (eliminations)	57		—		(57		)	—
Revenues	$	1,900,609	$	247,940	$	86		$	2,148,635
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 September 30, 2019)	$	6,260,968	$	7,135,250	$	121,752		$	13,517,970
Three months ended September 30, 2018
Revenues from external customers	$	687,396	$	80,496	$	156		$	768,048
Intersegment revenues (eliminations)	13		—		(13		)	—
Revenues	$	687,409	$	80,496	$	143		$	768,048
Income (loss) before income taxes	$	57,354	$	26,831	$	(6,952	)	$	77,233
Income taxes (benefit)	7,144		5,610		(1,892		)	10,862
Net income (loss)	50,210		21,221		(5,060		)	66,371
Preferred stock dividends of subsidiaries	498		—		(27		)	471
Net income (loss) for common stock	$	49,712	$	21,221	$	(5,033	)	$	65,900
Nine months ended September 30, 2018
Revenues from external customers	$	1,865,922	$	233,019	$	258		$	2,099,199
Intersegment revenues (eliminations)	40		—		(40		)	—
Revenues	$	1,865,962	$	233,019	$	218		$	2,099,199
Income (loss) before income taxes	$	134,847	$	77,845	$	(22,601	)	$	190,091
Income taxes (benefit)	24,995		17,103		(5,625		)	36,473
Net income (loss)	109,852		60,742		(16,976		)	153,618
Preferred stock dividends of subsidiaries	1,496		—		(79		)	1,417
Net income (loss) for common stock	$	108,356	$	60,742	$	(16,897	)	$	152,201
Total assets (at December 31, 2018)	$	5,967,503	$	7,027,894	$	108,654		$	13,104,051