BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Property, plant and equipment
Property, plant and equipment	$ 7,365,981	$ 7,274,268
Accumulated depreciation and amortization	2,102,368	2,083,433
Net property, plant and equipment	5,263,613	5,190,835
Current assets
Cash and cash equivalents	12,447	8,852
Accounts receivable, net	494,696	341,756
Materials and supplies	54,187	54,892
Natural gas in storage	78,945	179,646
Regulatory assets	1,600,034	1,611,676
Other current assets	34,161	27,742
Total current assets	2,274,470	2,224,564
Goodwill and other assets
Regulatory assets	651,931	724,862
Goodwill	157,953	157,953
Other assets	119,667	103,906
Total goodwill and other assets	929,551	986,721
Total assets	8,467,634	8,402,120
Equity and long-term debt
Common stock, $0.01 par value: authorized 250,000,000 shares; issued and outstanding 54,089,817 shares at March 31, 2022; issued and outstanding 53,633,210 shares at December 31, 2021	541	536
Paid-in Capital	1,824,771	1,790,362
Retained earnings	630,536	565,161
Accumulated other comprehensive loss	(6,458)	(6,527)
Total equity	2,449,390	2,349,532
Long-term debt, excluding current maturities and net of issuance costs of $12,229 and $12,418, respectively	2,283,620	3,683,378
Total equity and long-term debt	4,733,010	6,032,910
Current liabilities
Long-term Debt, Current Maturities	1,400,011	11
Commercial Paper	505,165	494,000
Accounts payable	209,756	258,554
Accrued taxes other than income	75,153	67,035
Regulatory Liability, Current	32,822	8,090
Customer deposits	61,105	62,454
Other current liabilities	84,754	90,349
Total current liabilities	2,368,766	980,493
Deferred credits and other liabilities
Deferred income taxes	698,765	695,284
Regulatory Liability, Noncurrent	542,622	552,928
Employee benefit obligations	28,468	35,226
Other deferred credits	96,003	105,279
Liabilities, Other than Long-term Debt, Noncurrent	1,365,858	1,388,717
Commitments and contingencies
Total liabilities and equity	$ 8,467,634	$ 8,402,120