BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Property, plant and equipment
Property, plant and equipment	$ 9,734,150	$ 9,124,134
Accumulated depreciation and amortization	2,611,952	2,478,261
Net property, plant and equipment	7,122,198	6,645,873
Current assets
Cash and cash equivalents	10,620	57,995
Restricted cash and cash equivalents	23,107	20,542
Cash, cash equivalents, restricted cash and restricted cash equivalents	33,727	78,537
Accounts receivable, net	461,631	408,448
Materials and supplies	97,595	91,662
Income taxes receivable	55,552	53,624
Natural gas in storage	176,451	161,184
Regulatory assets, current	49,504	101,210
Other current assets	41,424	35,216
Total current assets	915,884	929,881
Goodwill and other assets
Regulatory assets, noncurrent	256,225	278,006
Other intangible assets, net	233,786	265,951
Goodwill	157,953	157,953
Pension and other postemployment benefits	47,012	42,882
Other assets	120,026	105,025
Total goodwill and other assets	815,002	849,817
Total assets	8,853,084	8,425,571
Equity and long-term debt
Common stock, $0.01 par value: authorized 250,000,000 shares; issued and outstanding 62,692,392 shares at December 31, 2025; issued and outstanding 59,876,861 shares at December 31, 2024	627	599
Paid-in capital	2,530,137	2,294,469
Retained earnings	909,355	809,606
Accumulated other comprehensive income (loss), net of tax	4	(126)
Total equity	3,440,123	3,104,548
Other long-term debt, noncurrent, net of issuance costs	2,133,018	2,131,718
Securitized utility tariff bonds, excluding current maturities, net of issuance costs	223,020	253,568
Long-Term debt, excluding current maturities, total, net of issuance costs	2,356,038	2,385,286
Total equity and long-term debt	5,796,161	5,489,834
Current liabilities
Long-term debt, current maturities, net of issuance costs	249,674	14
Current maturities of securitized utility tariff bonds, net of issuance costs	30,566	28,956
Short-term debt	737,400	914,600
Accounts payable	222,102	261,321
Accrued taxes other than income	75,568	75,608
Regulatory liability, current	57,277	22,525
Customer deposits	52,871	56,243
Other current liabilities	106,400	99,009
Total current liabilities	1,531,858	1,458,276
Deferred credits and other liabilities
Deferred income taxes	963,874	891,738
Regulatory liability, noncurrent	451,620	467,563
Other deferred credits	109,571	118,160
Total deferred credits and other liabilities	1,525,065	1,477,461
Commitments and contingencies
Total liabilities and equity	$ 8,853,084	$ 8,425,571