CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Current Assets:
Cash and cash equivalents	$ 15,704	$ 13,428
Accounts and notes receivable-less allowances of $4,871 and $6,473, respectively	141,643	255,746
Inventory	115,805	107,674
Regulatory assets	163,906	193,787
Other current assets	89,881	151,167
Total current assets	526,939	721,802
Net utility property	5,548,651	5,444,709
Goodwill	52,426	52,426
Non-current regulatory assets	861,491	833,328
Other property and investments-net and other non-current assets	381,808	365,085
Total assets	7,371,315	7,417,350
Current Liabilities:
Accounts payable	103,587	202,954
Current portion of long-term debt	7,000	13,500
Short-term borrowings	203,000	463,000
Regulatory liabilities	79,093	95,665
Other current liabilities	148,483	189,415
Total current liabilities	541,163	964,534
Pensions and other postretirement benefits	92,741	93,901
Deferred income taxes	703,683	674,995
Non-current regulatory liabilities	845,022	840,837
Other non-current liabilities and deferred credits	206,737	175,855
Total liabilities	4,970,894	5,082,682
Commitments and Contingencies (See Notes to Condensed Consolidated Financial Statements)
Shareholders' Equity:
Common stock, no par value; 200,000,000 shares authorized; 76,524,184 and 74,945,948 shares issued and outstanding, respectively	1,588,503	1,525,185
Accumulated other comprehensive loss	(2,095)	(2,058)
Retained earnings	814,013	811,541
Total shareholders’ equity	2,400,421	2,334,668
Total liabilities and equity	7,371,315	7,417,350
Non Affiliated Trusts [Member]
Current Liabilities:
Long-term debt	2,530,001	2,281,013
Affiliated Trusts [Member]
Current Liabilities:
Long-term debt	$ 51,547	$ 51,547