Segment financial information (Tables)

12 Months Ended

Dec. 31, 2020

Segment Reporting [Abstract]

Schedule of segment financial information

Segment financial information was as follows:

(in thousands)	Electric utility		Bank		Other		Total
2020
Revenues from external customers	$	2,265,281	$	313,511	$	983	$	2,579,775
Intersegment revenues (eliminations)	39		—		(39)		—
Revenues	2,265,320		313,511		944		2,579,775
Depreciation and amortization	256,479		29,349		4,950		290,778
Interest expense, net	67,794		11,114		20,900		99,808
Income (loss) before income taxes	211,753		69,271		(40,400)		240,624
Income taxes (benefit)	40,418		11,688		(11,196)		40,910
Net income (loss)	171,335		57,583		(29,204)		199,714
Preferred stock dividends of subsidiaries	1,995		—		(105)		1,890
Net income (loss) for common stock	169,340		57,583		(29,099)		197,824
Capital expenditures1	350,864		12,203		20,828		383,895
Assets (at December 31, 2020)	6,457,373		8,396,533		150,101		15,004,007
2019
Revenues from external customers	$	2,545,865	$	327,917	$	166	$	2,873,948
Intersegment revenues (eliminations)	77		—		(77)		—
Revenues	2,545,942		327,917		89		2,873,948
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 expenditures1	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

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