CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Utility revenues:
Utility revenues, exclusive of alternative revenue programs	$ 606,511	$ 493,543
Alternative revenue programs	2,883	(19,038)
Total utility revenues	609,394	474,505
Non-utility revenues	22	126
Total operating revenues	609,416	474,631
Utility operating expenses:
Resource costs	293,117	192,928
Other operating expenses	111,249	104,978
Depreciation and amortization	67,927	65,188
Taxes other than income taxes	35,688	33,894
Non-utility operating expenses	319	1,042
Total operating expenses	508,300	398,030
Income from operations	101,116	76,601
Interest expense	36,904	35,084
Interest expense to affiliated trust	657	571
Capitalized interest	(961)	(842)
Other income-net	(9,285)	(6,429)
Income before income taxes	73,801	48,217
Income tax expense (benefit)	2,306	(6,628)
Net income	$ 71,495	$ 54,845
Weighted-average common shares outstanding (thousands), basic	78,161	75,169
Weighted-average common shares outstanding (thousands), diluted	78,211	75,275
Earnings per common share:
Basic	$ 0.91	$ 0.73
Diluted	$ 0.91	$ 0.73