BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Property, plant and equipment
Property, plant and equipment	$ 9,231,791	$ 9,124,134
Accumulated depreciation and amortization	2,493,171	2,478,261
Net property, plant and equipment	6,738,620	6,645,873
Current assets
Cash and cash equivalents	19,305	57,995
Restricted cash and cash equivalents	8,883	20,542
Cash, cash equivalents, restricted cash and restricted cash equivalents	28,188	78,537
Accounts receivable, net	446,807	408,448
Materials and supplies	87,981	91,662
Income taxes receivable	53,624	53,624
Natural gas in storage	68,686	161,184
Regulatory assets, current	36,538	101,210
Other current assets	34,414	35,216
Total current assets	756,238	929,881
Goodwill and other assets
Regulatory assets, noncurrent	268,581	278,006
Other intangible assets, net	258,257	265,951
Goodwill	157,953	157,953
Defined benefit plan, amounts for asset (liability) recognized in statement of financial position	44,366	42,882
Other assets	103,225	105,025
Total goodwill and other assets	832,382	849,817
Total assets	8,327,240	8,425,571
Equity and long-term debt
Common stock, $0.01 par value: authorized 250,000,000 shares; issued and outstanding 59,929,090 shares at March 31, 2025; issued and outstanding 59,876,861 shares at December 31, 2024	599	599
Paid-in capital	2,295,989	2,294,469
Retained earnings	888,449	809,606
Accumulated other comprehensive loss	(2)	(126)
Total equity	3,185,035	3,104,548
Other long-term debt, noncurrent	2,132,039	2,131,718
Securitized utility tariff bonds, excluding current maturities, net of issuance costs	238,363	253,568
Long-Term debt, excluding current maturities, total	2,370,402	2,385,286
Total equity and long-term debt	5,555,437	5,489,834
Current liabilities
Long-term debt, current maturities	14	14
Current maturities of securitized utility tariff bonds	29,750	28,956
Short-term debt	811,900	914,600
Accounts payable	175,898	261,321
Accrued taxes other than income	77,853	75,608
Regulatory liability, current	39,665	22,525
Customer deposits	54,923	56,243
Other current liabilities	87,395	99,009
Total current liabilities	1,277,398	1,458,276
Deferred credits and other liabilities
Deferred income taxes	921,360	891,738
Regulatory liability, noncurrent	457,126	467,563
Other deferred credits	115,919	118,160
Total deferred credits and other liabilities	1,494,405	1,477,461
Commitments and contingencies
Total liabilities and equity	$ 8,327,240	$ 8,425,571