v3.26.3
Unaudited Condensed Consolidated Statements Of Cash Flows - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
CASH FLOWS FROM OPERATIONS:    
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest $ 125,997 $ 90,325
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 284,271 271,313
Amortization of deferred financing costs and debt discounts 2,780 2,803
Deferred income taxes and investment tax credit adjustments - net 82,287 51,847
Allowance for equity funds used during construction (5,648) (2,023)
Change in certain assets and liabilities:    
Accounts receivable (3,075) 12,028
Inventories 14,113 (11,732)
Accounts payable 40,504 37,603
Accrued and other current liabilities 6,328 3,472
Accrued taxes payable/receivable 12,288 (538)
Accrued interest 31,863 35,286
Prepayments and other current assets (3,132) 10,539
Increase (Decrease) in Other Noncurrent Liabilities (25,250) (18,339)
Net cash provided by operating activities 750,479 646,142
CASH FLOWS FROM INVESTING ACTIVITIES:    
Payments to Acquire Productive Assets (691,781) (547,963)
Payments for Project Development Costs 3,233 1,728
Payments to Acquire Businesses, Net of Cash Acquired 0 (77,640)
Payments for (Proceeds from) Removal Costs (76,998) (23,052)
Net cash used in investing activities (759,019) (650,383)
CASH FLOWS FROM FINANCING ACTIVITIES:    
Borrowings under revolving credit facilities 365,000 440,000
Repayments under revolving credit facilities (130,000) (515,000)
Repayments of Short-term Debt 0 (400,000)
Short-term borrowings from affiliate 90,000 350,000
Repayments of long-term borrowings (90,000) (40,000)
Proceeds from Contributions from Parent 86,500 410,000
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders (202,643) (140,220)
Payments for financing fees (573) (5,659)
Repayments of Debt and Lease Obligation (103)  
Payments of Financing Costs   (245)
Net cash provided by financing activities 4,624 49,774
Net change in cash, cash equivalents and restricted cash (3,916) 45,533
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents 65,923 72,185
Cash paid during the period for:    
Interest (net of amount capitalized) 105,948 92,550
Income Tax Paid, after Refund Received 0 15,400
Non-cash investing activities:    
Capital Expenditures Incurred but Not yet Paid 113,796 175,170
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability 1,035 14,151
Other Noncash Investing and Financing Items [Abstract]    
Change in Right-of-Use Asset Lease Liability (179) (13,102)
Investment Tax Credit   133,010
Payments to Noncontrolling Interests 0 (46,223)
Prepayments and other current assets (3,132) 10,539
Proceeds from Contribution in Aid of Construction, Investing Activity 12,993 0
Tax Credit Transfer Proceeds Allocated to Noncontrolling Interest 189,625 133,010
Non-cash Contributions from Noncontrolling Interests Related to Tax Credit Transfers 189,625  
Increase (Decrease) in Other Current Assets and Liabilities, Net (5,995) 4,031
Payments of Ordinary Dividends, Common Stock 233,090 199,044
Sales to Noncontrolling Interests (119,533) 149,942
Other Regulatory Assets (Liabilities)    
Increase (Decrease) in Regulatory Assets and Liabilities (13,313) 569
Increase (Decrease) in Current Regulatory Assets and Liabilities $ 10,572 $ 31,624