Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating Revenues:
Utility	$ 958,383	$ 918,428	$ 896,874
Nonutility	1,033,613	622,955	731,752
Total Operating Revenues	1,991,996	1,541,383	1,628,626
Operating Expenses:
Operations	265,140	272,171	276,093
Impairment Charges	0	0	10,745
Depreciation	131,778	118,715	99,753
Energy and Other Taxes	1,435	11,918	11,996
Net Gain on Sales of Assets	0	(2,578)	(3,133)
Total Operating Expenses	1,642,876	1,259,161	1,427,421
Operating Income (Loss)	349,120	282,222	201,205
Other Income and Expense	4,592	7,979	4,208
Interest Charges	(127,130)	(118,534)	(114,477)
Income Before Income Taxes	226,582	171,667	90,936
Income Taxes	(47,107)	(22,664)	(21,061)
Equity in (Losses) Earnings of Affiliated Companies	(90,961)	8,294	7,314
Income from Continuing Operations	88,514	157,297	77,189
Income (Loss) from Discontinued Operations - (Net of taxes)	51	(255)	(272)
Net Income	88,565	157,042	76,917
Subtract/Add: Income (Loss) Attributable to Noncontrolling Interests	474	(42)	0
Net Income	$ 88,091	$ 157,084	$ 76,917
Basic Earnings per Common Share:
Continuing Operations (in USD per share)	$ 0.81	$ 1.62	$ 0.84
Discontinued Operations (in USD per share)	0	0	0
Net Income (in USD per share)	0.81	1.62	0.84
Subtract/Add: Income (loss) attributable to noncontrolling interests (in USD per share)	$ 0	$ 0	$ 0
Average Shares of Common Stock Outstanding - Basic (in shares)	109,269	96,854	92,130
Diluted Earnings per Common Share:
Continuing Operations (in USD per share)	$ 0.80	$ 1.62	$ 0.84
Discontinued Operations (in USD per share)	0	0	0
Net Income (in USD per share)	0.80	1.62	0.84
Subtract/Add: Income (loss) attributable to noncontrolling interests (in USD per share)	$ 0	$ 0	$ 0
Average Shares of Common Stock Outstanding - Diluted (in shares)	110,120	96,995	92,253
Utility
Operating Expenses:
Cost of Sales - (Excluding depreciation and amortization)	$ 296,356	$ 297,094	$ 351,284
Nonutility
Operating Expenses:
Cost of Sales - (Excluding depreciation and amortization)	$ 948,167	$ 561,841	$ 680,683