CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenues
Total operating revenues	$ 1,223,000	$ 1,073,300
Operating expenses
Cost of sales — steam and other	4,400	3,900
Operating and maintenance expenses	199,300	183,100
Demand side management expenses	32,100	32,700
Depreciation and amortization	146,900	121,600
Taxes (other than income taxes)	53,700	52,600
Total operating expenses	1,013,100	866,400
Operating income	209,900	206,900
Other income, net	1,000	200
Interest charges and financing costs
Interest charges — includes other financing costs of $1.6 and $1.6, respectively	59,500	49,900
Allowance for funds used during construction — debt	(2,400)	(4,600)
Total interest charges and financing costs	57,100	45,300
Allowance for funds used during construction — equity	4,100	10,900
Income before income taxes	157,900	172,700
Income taxes	19,100	39,000
Net income	138,800	133,700
Electric
Revenues
Total operating revenues	741,500	698,300
Operating expenses
Electric fuel and purchased power	304,200	281,200
Natural gas
Revenues
Total operating revenues	469,100	364,000
Operating expenses
Electric fuel and purchased power	272,500	191,300
Steam and other
Revenues
Total operating revenues	$ 12,400	$ 11,000