Segment financial information (Tables)

12 Months Ended

Dec. 31, 2019

Segment Reporting [Abstract]

Schedule of segment financial information

Segment financial information was as follows:

(in thousands)	Electric utility		Bank		Other			Total
2019
Revenues from external customers	$	2,545,865	$	328,570	$	166		$	2,874,601
Intersegment revenues (eliminations)	77		—		(77		)	—
Revenues	2,545,942		328,570		89			2,874,601
Depreciation and amortization	245,362		28,675		4,076			278,113
Interest expense, net	70,842		18,440		20,057			109,339
Income (loss) before income taxes	197,140		112,034		(37,765		)	271,409
Income taxes (benefit)	38,305		23,061		(9,729		)	51,637
Net income (loss)	158,835		88,973		(28,036		)	219,772
Preferred stock dividends of subsidiaries	1,995		—		(105		)	1,890
Net income (loss) for common stock	156,840		88,973		(27,931		)	217,882
Capital expenditures	419,898		24,175		13,447			457,520
Assets (at December 31, 2019)	6,388,682		7,233,017		123,552			13,745,251
2018
Revenues from external customers	$	2,546,472	$	314,275	$	102		$	2,860,849
Intersegment revenues (eliminations)	53		—		(53		)	—
Revenues	2,546,525		314,275		49			2,860,849
Depreciation and amortization	230,228		21,443		3,958			255,629
Interest expense, net	73,348		15,539		15,329			104,216
Income (loss) before income taxes	180,426		106,578		(32,543		)	254,461
Income taxes (benefit)	34,778		24,069		(8,050		)	50,797
Net income (loss)	145,648		82,509		(24,493		)	203,664
Preferred stock dividends of subsidiaries	1,995		—		(105		)	1,890
Net income (loss) for common stock	143,653		82,509		(24,388		)	201,774
Capital expenditures1	415,264		72,666		18,840			537,369
Assets (at December 31, 2018)	5,967,503		7,027,894		108,654			13,104,051
2017
Revenues from external customers	$	2,257,455	$	297,640	$	530		$	2,555,625
Intersegment revenues (eliminations)	111		—		(111		)	—
Revenues	2,257,566		297,640		419			2,555,625
Depreciation and amortization	201,282		19,416		1,300			221,998
Interest expense, net	69,637		12,156		9,335			91,128
Income (loss) before income taxes	205,145		98,716		(27,281		)	276,580
Income taxes (benefit)	83,199		31,719		(5,525		)	109,393
Net income (loss)	121,946		66,997		(21,756		)	167,187
Preferred stock dividends of subsidiaries	1,995		—		(105		)	1,890
Net income (loss) for common stock	119,951		66,997		(21,651		)	165,297
Capital expenditures1	376,865		53,272		317			495,187
Assets (at December 31, 2017)	5,630,613		6,798,659		104,888			12,534,160

¹ 

Contributions in aid of construction balances are included in capital expenditures.