Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Current assets:
Cash, cash equivalents and restricted cash	$ 89,296	$ 76,975	$ 85,971
Receivables, net	932,146	942,782	1,086,385
Current regulatory assets	158,614	172,492	216,318
Inventories	57,429	87,392	52,619
Prepayments and other current assets	82,459	84,082	46,525
Current assets of discontinued operations	0	0	620,896
Total current assets	1,319,944	1,363,723	2,108,714
Noncurrent assets:
Property, plant and equipment	7,441,589	7,341,116	6,962,954
Less accumulated depreciation and amortization	2,262,789	2,220,206	2,127,607
Net property, plant and equipment	5,178,800	5,120,910	4,835,347
Goodwill	488,960	488,960	488,960
Other intangible assets, net	1,482	2,004	3,571
Regulatory assets	414,433	447,099	349,500
Investments	119,396	124,235	136,924
Operating lease right-of-use assets	76,223	74,363	74,057
Other	240,633	211,865	157,903
Noncurrent assets of discontinued operations	0	0	1,687,611
Total noncurrent assets	6,519,927	6,469,436	7,733,873
Total assets	7,839,871	7,833,159	9,842,587
Current liabilities:
Short-term borrowings	0	95,000	293,500
Long-term debt due within one year	60,700	61,319	47,819
Accounts payable	420,168	475,215	429,014
Taxes payable	81,972	58,110	75,316
Dividends payable	25,044	25,461	45,306
Accrued compensation	47,394	85,512	51,499
Operating lease liabilities due within one year	23,134	22,884	21,994
Regulatory liabilities due within one year	90,115	70,761	44,395
Other accrued liabilities	174,296	181,471	178,771
Current liabilities of discontinued operations	0	0	448,715
Total current liabilities	922,823	1,075,733	1,636,329
Noncurrent liabilities:
Long-term debt	2,325,697	2,236,904	2,191,898
Deferred income taxes	461,808	458,548	467,007
Asset retirement obligations	388,451	384,371	376,085
Regulatory liabilities	523,484	521,050	454,669
Operating lease liabilities	53,204	51,645	52,619
Other	183,463	199,675	191,513
Noncurrent liabilities of discontinued operations	0	0	897,085
Total noncurrent liabilities	3,936,107	3,852,193	4,630,876
Commitments and contingencies
Stockholders' equity:
Common stock Authorized - 500,000,000 shares, $1.00 par value Shares issued - 203,888,237 at March 31, 2024, 204,162,814 at March 31, 2023 and 203,689,090 at December 31, 2023	203,888	203,689	204,163
Other paid-in capital	1,466,551	1,466,235	1,461,294
Retained earnings	1,328,812	1,253,693	1,943,917
Accumulated other comprehensive loss	(18,310)	(18,384)	(30,366)
Treasury stock at cost - 538,921 shares at March 31, 2023	0	0	(3,626)
Total stockholders' equity	2,980,941	2,905,233	3,575,382
Total liabilities and stockholders' equity	$ 7,839,871	$ 7,833,159	$ 9,842,587