Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024	Sep. 30, 2024
Current assets:
Cash, cash equivalents and restricted cash	$ 75,853	$ 66,904	$ 88,282
Receivables, net	132,240	274,303	128,241
Current regulatory assets	179,149	215,436	241,008
Inventories	44,272	44,940	44,966
Prepayments and other current assets	69,853	64,676	76,478
Current assets of discontinued operations	0	0	888,845
Total current assets	501,367	666,259	1,467,820
Noncurrent assets:
Property, plant and equipment	7,863,725	7,554,063	7,420,616
Less accumulated depreciation and amortization	2,272,380	2,209,771	2,169,271
Net property, plant and equipment	5,591,345	5,344,292	5,251,345
Goodwill	345,736	345,736	345,736
Regulatory assets	305,890	322,350	343,578
Investments	118,443	115,459	112,954
Other	322,959	244,722	258,456
Noncurrent assets of discontinued operations	0	0	392,760
Total noncurrent assets	6,684,373	6,372,559	6,704,829
Total assets	7,185,740	7,038,818	8,172,649
Current liabilities:
Long-term debt due within one year	164,700	161,700	86,777
Accounts payable	122,109	150,070	106,503
Regulatory liabilities due within one year	143,822	137,167	157,068
Taxes payable	43,328	43,372	47,873
Dividends payable	28,606	26,511	26,024
Accrued compensation	31,628	35,264	30,082
Other accrued liabilities	132,356	124,514	148,630
Current liabilities of discontinued operations	0	0	678,418
Total current liabilities	666,549	678,598	1,281,375
Noncurrent liabilities:
Long-term debt	2,188,485	2,130,910	2,233,520
Deferred income taxes	434,099	441,320	452,513
Regulatory liabilities	473,812	459,170	463,790
Asset retirement obligations	419,616	406,351	397,952
Other	280,085	231,895	228,545
Noncurrent liabilities of discontinued operations	0	0	56,969
Total noncurrent liabilities	3,796,097	3,669,646	3,833,289
Commitments and contingencies
Stockholders' equity:
Common stock Authorized - 500,000,000 shares, $1.00 par value Shares issued - 204,331,170 at September 30, 2025, 203,888,237 at September 30, 2024 and 203,934,578 at December 31, 2024	204,331	203,935	203,888
Other paid-in capital	1,473,739	1,473,738	1,470,429
Retained earnings	1,061,407	1,029,699	1,401,555
Accumulated other comprehensive loss	(16,383)	(16,798)	(17,887)
Total stockholders' equity	2,723,094	2,690,574	3,057,985
Total liabilities and stockholders' equity	$ 7,185,740	$ 7,038,818	$ 8,172,649