CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Revenues
Electric	$ 1,200,701	$ 1,068,833	$ 1,106,565
Gas	313,197	353,310	371,272
Total Revenues	1,513,898	1,422,143	1,477,837
Utilities Operating Expense, Fuel Used	433,816	420,262	492,011
Operating Expenses
Operating and maintenance	227,836	220,524	221,427
Administrative and general	137,437	117,360	113,776
Property and other taxes	163,853	153,068	192,524
Depreciation and depletion	227,635	210,474	195,020
Total Operating Expenses	1,190,577	1,121,688	1,214,758
Operating Income	323,321	300,455	263,079
Interest Expense, net	(131,673)	(114,617)	(100,110)
Other Income, net	23,024	15,832	19,434
Income Before Income Taxes	214,672	201,670	182,403
Income Tax Benefit (Expense)	9,439	(7,539)	605
Net Income	$ 224,111	$ 194,131	$ 183,008
Average Common Shares Outstanding	61,293,052	60,321,481	55,769,156
Basic Earnings per Average Common Share	$ 3.66	$ 3.22	$ 3.28
Diluted Earnings per Average Common Share	$ 3.65	$ 3.22	$ 3.25