Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023
Current assets:
Cash, cash equivalents and restricted cash	$ 104,016	$ 76,975	$ 32,493
Receivables, net	934,473	942,782	893,019
Current regulatory assets	241,008	172,492	169,248
Inventories	91,889	87,392	80,235
Prepayments and other current assets	96,434	84,082	63,805
Retained shares in Knife River	0	0	276,213
Total current assets	1,467,820	1,363,723	1,515,013
Noncurrent assets:
Property, plant and equipment	7,703,249	7,341,116	7,211,680
Less accumulated depreciation and amortization	2,322,543	2,220,206	2,191,514
Net property, plant and equipment	5,380,706	5,120,910	5,020,166
Goodwill	488,960	488,960	488,960
Other intangible assets, net	466	2,004	2,526
Regulatory assets	343,578	447,099	428,969
Investments	130,602	124,235	139,327
Operating lease right-of-use assets	90,439	74,363	75,729
Other	270,078	211,865	198,459
Total noncurrent assets	6,704,829	6,469,436	6,354,136
Total assets	8,172,649	7,833,159	7,869,149
Current liabilities:
Short-term borrowings	0	95,000	306,400
Long-term debt due within one year	218,777	61,319	61,319
Accounts payable	489,100	475,215	414,479
Taxes payable	61,879	58,110	49,500
Dividends payable	26,024	25,461	25,455
Accrued compensation	97,041	85,512	94,230
Operating lease liabilities due within one year	28,133	22,884	23,112
Regulatory liabilities due within one year	157,068	70,761	45,013
Other accrued liabilities	203,353	181,471	154,147
Total current liabilities	1,281,375	1,075,733	1,173,655
Noncurrent liabilities:
Long-term debt	2,233,520	2,236,904	2,279,828
Deferred income taxes	453,155	458,548	526,654
Asset retirement obligations	397,952	384,371	384,083
Regulatory liabilities	463,790	521,050	495,112
Operating lease liabilities	62,569	51,645	52,908
Other	222,303	199,675	199,475
Total noncurrent liabilities	3,833,289	3,852,193	3,938,060
Commitments and contingencies
Stockholders' equity:
Common stock Authorized - 500,000,000 shares, $1.00 par value Shares issued - 203,888,237 at September 30, 2024, 203,638,373 at September 30, 2023 and 203,689,090 at December 31, 2023	203,888	203,689	203,638
Other paid-in capital	1,470,429	1,466,235	1,462,939
Retained earnings	1,401,555	1,253,693	1,108,616
Accumulated other comprehensive loss	(17,887)	(18,384)	(17,759)
Total stockholders' equity	3,057,985	2,905,233	2,757,434
Total liabilities and stockholders' equity	$ 8,172,649	$ 7,833,159	$ 7,869,149