CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 1,009	$ 21,262
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization including nuclear fuel	208,772	203,639
Deferred fuel and purchased power	(90,305)	(6,110)
Deferred fuel and purchased power amortization	80,904	39,442
Allowance for equity funds used during construction	(15,061)	(9,747)
Deferred income taxes	(5,150)	3,835
Deferred investment tax credit	3,749	(319)
Change in derivative instruments fair value	786	0
Stock compensation	3,635	5,338
Changes in current assets and liabilities:
Customer and other receivables	2,831	66,146
Accrued unbilled revenues	21,488	1,215
Materials, supplies and fossil fuel	(14,392)	(11,892)
Income tax receivable	2,387	542
Other current assets	(8,110)	13,347
Accounts payable	(69,576)	(13,873)
Accrued taxes	50,044	53,847
Other current liabilities	(84,239)	(40,211)
Change in margin and collateral accounts - assets	11	8,600
Change in other long-term assets	(58,036)	52,153
Change in operating lease assets	(8,920)	324
Change in other long-term liabilities	138,649	(47,883)
Change in operating lease liabilities	51,129	953
Net cash provided by operating activities	211,605	340,608
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(445,171)	(391,583)
Contributions in aid of construction	25,165	28,262
Allowance for borrowed funds used during construction	(12,722)	(4,422)
Proceeds from nuclear decommissioning trusts sales and other special use funds	226,626	361,754
Investment in nuclear decommissioning trusts and other special use funds	(227,196)	(361,809)
Other	(19,941)	(6,543)
Net cash used for investing activities	(453,239)	(374,341)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuance of long-term debt	185,136	312,052
Short-term borrowing and (repayments) - net	156,830	(29,050)
Dividends paid on common stock	(96,078)	(94,265)
Repayment of long-term debt	0	(150,000)
Common stock equity issuances and (purchases) - net	(2,135)	(1,005)
Net cash provided by financing activities	243,753	37,732
NET INCREASE IN CASH AND CASH EQUIVALENTS	2,119	3,999
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	4,832	9,969
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 6,951	$ 13,968