Condensed Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Cash flows from operating activities
Net income	$ 30,450	$ 27,144
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation of property, plant and equipment	66,541	65,766
Other amortization	8,906	10,796
Loss on sale of a subsidiary	0	13,211
Deferred income tax benefit	(4,055)	(316)
Share-based compensation expense	1,202	754
Allowance for equity funds used during construction	(3,764)	(3,585)
Other	(3,491)	(2,809)
Changes in assets and liabilities
Decrease in accounts receivable and unbilled revenues, net	36,366	378
Increase in fuel oil stock	(10,958)	(15,352)
Increase in materials and supplies	(2,161)	(8,943)
Decrease in regulatory assets	1,012	5,985
Increase (decrease) in regulatory liabilities	(539)	27,619
Increase in accounts, interest and dividends payable	35,362	21,744
Change in prepaid and accrued income taxes, tax credits and utility revenue taxes	(45,457)	(54,036)
Change in defined benefit pension and other postretirement benefit plans asset/liability	(2,073)	(1,499)
Change in other assets and liabilities	(46,310)	(37,192)
Net cash provided by operating activities	61,031	49,665
Cash flows from investing activities
Proceeds from sale of subsidiaries	0	5,781
Capital expenditures	(103,535)	(86,538)
Other, net	1,623	2,264
Net cash used in investing activities	(101,912)	(78,493)
Cash flows from financing activities
Repayment of long-term debt	(5,042)	(98,067)
Withheld shares for employee taxes on vested share-based compensation	(128)	(178)
Preferred stock dividends of subsidiaries	0	(473)
Other	(2,887)	(3,488)
Net cash used in financing activities	(8,057)	(102,206)
Net decrease in cash, cash equivalents and restricted cash	(48,938)	(131,034)
Cash, cash equivalents and restricted cash, beginning of period	980,746	1,242,852
Cash, cash equivalents and restricted cash, end of period	931,808	1,111,818
Less: Restricted cash	(478,968)	(482,480)
Cash and cash equivalents, end of period	$ 452,840	$ 629,338