Segment financial information (Tables)

12 Months Ended

Dec. 31, 2014

Segment Reporting [Abstract]

Schedule of segment financial information

Segment financial information was as follows:

(in thousands)	Electric utility		Bank		Other			Total
2014
Revenues from external customers	$	2,987,299	$	252,497	$	(254	)	$	3,239,542
Intersegment revenues (eliminations)	24		—		(24		)	—
Revenues	2,987,323		252,497		(278		)	3,239,542
Depreciation and amortization, as revised (1)	172,797		5,399		1,361			179,557
Interest expense, net	64,757		10,808		11,595			87,160
Income (loss) before income taxes	220,361		75,619		(34,058		)	261,922
Income taxes (benefit)	80,725		24,127		(13,140		)	91,712
Net income (loss)	139,636		51,492		(20,918		)	170,210
Preferred stock dividends of subsidiaries	1,995		—		(105		)	1,890
Net income (loss) for common stock	137,641		51,492		(20,813		)	168,320
Capital expenditures, as revised (1)	336,679		28,073		74			364,826
Assets (at December 31, 2014)	5,590,457		5,565,241		28,463			11,184,161
2013
Revenues from external customers	$	2,980,139	$	258,147	$	184		$	3,238,470
Intersegment revenues (eliminations)	33		—		(33		)	—
Revenues	2,980,172		258,147		151			3,238,470
Depreciation and amortization	159,102		4,230		1,396			164,728
Interest expense, net	59,279		10,077		16,200			85,556
Income (loss) before income taxes	194,041		87,059		(33,353		)	247,747
Income taxes (benefit)	69,117		29,525		(14,301		)	84,341
Net income (loss)	124,924		57,534		(19,052		)	163,406
Preferred stock dividends of subsidiaries	1,995		—		(105		)	1,890
Net income (loss) for common stock	122,929		57,534		(18,947		)	161,516
Capital expenditures, as restated (1)	378,044		11,193		201			389,438
Assets (at December 31, 2013)	5,087,129		5,243,824		9,091			10,340,044
2012
Revenues from external customers	$	3,109,353	$	265,539	$	103		$	3,374,995
Intersegment revenues (eliminations)	86		—		(86		)	—
Revenues	3,109,439		265,539		17			3,374,995
Depreciation and amortization	151,496		5,334		1,517			158,347
Interest expense, net	62,055		11,292		16,096			89,443
Income (loss) before income taxes	162,319		89,021		(33,933		)	217,407
Income taxes (benefit)	61,048		30,384		(14,573		)	76,859
Net income (loss)	101,271		58,637		(19,360		)	140,548
Preferred stock dividends of subsidiaries	1,995		—		(105		)	1,890
Net income (loss) for common stock	99,276		58,637		(19,255		)	138,658
Capital expenditures, as restated (1)	355,326		14,979		410			370,715
Assets (at December 31, 2012)	5,108,793		5,041,673		(1,334		)	10,149,132

(1) As revised or restated - See Note 1, “Summary of significant accounting policies -Revision and restatements of previously issued financial statements.”