STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Operating activities
Net income	$ 177,918	$ 145,828
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	237,951	221,247
Deferred income taxes	30,742	82,052
Share-based compensation expense	11,305	10,458
Provision for doubtful accounts	5,843	3,736
Changes in assets and liabilities:
Accounts receivable	192,432	167,880
Materials and supplies	(5,791)	(16,743)
Natural gas in storage	(36,861)	6,302
Payments for Removal Costs	(35,987)	(48,135)
Accounts payable	(130,571)	(116,385)
Accrued taxes other than income	(1,920)	3,036
Customer deposits	419	10,350
Increase (Decrease) In Regulatory Assets And Liabilities Current, net	55,334	(106,051)
Increase (Decrease) In Regulatory Assets And Liabilities Noncurrent, net	23,620	13,374
Increase (Decrease) in Other Current Assets and Liabilities, Net	3,339	(67,145)
Increase (Decrease) in Other Noncurrent Assets and Liabilities, Net	8,045	(4,023)
Cash provided by operating activities	535,818	305,781
Investing activities
Capital expenditures	(539,433)	(523,590)
Payments for Other Investing Activities	(8,053)	(3,760)
Proceeds from Sale of Other Assets, Investing Activities	3,629	5,122
Cash used in investing activities	(543,857)	(522,228)
Financing activities
Borrowings (repayments) of short-term debt, net	(150,200)	862,900
Proceeds from Issuance of Senior Long-Term Debt	250,000	253,651
Payments of Debt Issuance Costs	(432)	0
Repayments of Other Long-Term Debt	(10)	(773,000)
Repayment of securitized utility tariff bonds	(29,493)	(27,939)
Proceeds from Issuance of Common Stock	3,561	3,368
Dividends paid	(120,505)	(112,064)
Payment, Tax Withholding, Share-based Payment Arrangement	(2,634)	(1,098)
Cash used in financing activities	(49,713)	205,818
Change in cash and cash equivalents	(57,752)	(10,629)
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Beginning Balance	78,537	39,387
Cash, cash equivalents, restricted cash and restricted cash equivalents at end of period	20,785	28,758
Interest Paid, Excluding Capitalized Interest	103,926	110,667
Income Tax Paid, State and Local, after Refund Received	(768)	(1,832)
Income Tax Paid, Federal, after Refund Received	$ 7,763	$ 600