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CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Current Assets:    
Cash and cash equivalents $ 8,630 $ 13,428
Accounts and notes receivable-less allowances of $3,900 and $6,473, respectively 131,900 255,746
Inventory 145,174 107,674
Regulatory assets 167,927 193,787
Other current assets 93,589 151,167
Total current assets 547,220 721,802
Net utility property 5,625,068 5,444,709
Goodwill 52,426 52,426
Non-current regulatory assets 855,099 833,328
Other property and investments-net and other non-current assets 390,217 365,085
Total assets 7,470,030 7,417,350
Current Liabilities:    
Accounts payable 105,320 202,954
Current portion of long-term debt   13,500
Short-term borrowings 221,500 463,000
Regulatory liabilities 73,843 95,665
Other current liabilities 182,801 189,415
Total current liabilities 583,464 964,534
Pensions and other postretirement benefits 92,228 93,901
Deferred income taxes 726,265 674,995
Non-current regulatory liabilities 863,717 840,837
Other non-current liabilities and deferred credits 212,706 175,855
Total liabilities 5,060,143 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; 77,364,125 and 74,945,948 shares issued and outstanding, respectively 1,618,780 1,525,185
Accumulated other comprehensive loss (2,114) (2,058)
Retained earnings 793,221 811,541
Total shareholders’ equity 2,409,887 2,334,668
Total liabilities and equity 7,470,030 7,417,350
Non Affiliated Trusts [Member]    
Current Liabilities:    
Long-term debt 2,530,216 2,281,013
Affiliated Trusts [Member]    
Current Liabilities:    
Long-term debt $ 51,547 $ 51,547