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Balance Sheet Components | 12 Months Ended
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Dec. 31, 2023
Balance Sheet Related Disclosures [Abstract] |
Balance Sheet Components | NOTE 3. BALANCE SHEET COMPONENTS Inventory Inventories of materials and supplies, emissions allowances, stored natural gas and fuel stock are recorded at average cost and consisted of the following as of December 31 (dollars in thousands):
|  | 2023 |  |  | 2022 |
Materials and supplies |  | $ | 81,651 |  |  | $ | 75,766 |
Emission allowances |  |  | 56,097 |  |  |  | — |
Stored natural gas |  |  | 16,272 |  |  |  | 26,788 |
Fuel stock |  |  | 5,964 |  |  |  | 5,120 |
Total |  | $ | 159,984 |  |  | $ | 107,674 |
Other Current Assets Other current assets consisted of the following as of December 31 (dollars in thousands):
|  | 2023 |  |  | 2022 |
Collateral posted for derivative instruments after netting with outstanding derivative liabilities |  | $ | — |  |  | $ | 66,142 |
Prepayments |  |  | 52,752 |  |  |  | 30,201 |
Income taxes receivable |  |  | 29,234 |  |  |  | 30,740 |
Derivative assets net of collateral |  |  | 11,821 |  |  |  | 18,198 |
Other |  |  | 9,977 |  |  |  | 5,886 |
Total |  | $ | 103,784 |  |  | $ | 151,167 |
Other Property and Investments-Net and Other Non-Current Assets Other property and investments-net and other non-current assets consisted of the following as of December 31 (dollars in thousands):
|  | 2023 |  |  | 2022 |
Equity investments |  | $ | 153,350 |  |  | $ | 147,809 |
Operating lease ROU assets |  |  | 67,585 |  |  |  | 68,238 |
Finance lease ROU assets |  |  | 36,414 |  |  |  | 40,056 |
Non-utility property |  |  | 33,813 |  |  |  | 25,401 |
Notes receivable |  |  | 15,287 |  |  |  | 17,954 |
Long-term prepaid license fees |  |  | 19,448 |  |  |  | 17,936 |
Pension assets |  |  | 32,997 |  |  |  | 13,382 |
Investment in affiliated trust |  |  | 11,547 |  |  |  | 11,547 |
Deferred compensation assets |  |  | 7,794 |  |  |  | 7,541 |
Other |  |  | 15,750 |  |  |  | 15,221 |
Total |  | $ | 393,985 |  |  | $ | 365,085 |
Other Current Liabilities Other current liabilities consisted of the following as of December 31 (dollars in thousands):
|  | 2023 |  |  | 2022 |
Accrued taxes other than income taxes |  | $ | 31,928 |  |  | $ | 38,568 |
Employee paid time off accruals |  |  | 32,072 |  |  |  | 29,279 |
Accrued interest |  |  | 23,539 |  |  |  | 20,863 |
Pensions and other postretirement benefits |  |  | 14,082 |  |  |  | 15,625 |
Derivative liabilities |  |  | 17,217 |  |  |  | 26,910 |
Climate Commitment Act obligations |  |  | 19,081 |  |  |  | — |
Deferred wholesale revenue |  |  | — |  |  |  | 8,481 |
Other |  |  | 54,017 |  |  |  | 49,689 |
Total |  | $ | 191,936 |  |  | $ | 189,415 |
Other Non-Current Liabilities and Deferred Credits Other non-current liabilities and deferred credits consisted of the following as of December 31 (dollars in thousands):
|  | 2023 |  |  | 2022 |
Operating lease liabilities |  | $ | 63,559 |  |  | $ | 64,284 |
Finance lease liabilities |  |  | 39,095 |  |  |  | 42,495 |
Deferred investment tax credits |  |  | 28,233 |  |  |  | 28,784 |
Climate Commitment Act obligations |  |  | 26,026 |  |  |  | — |
Asset retirement obligations |  |  | 18,058 |  |  |  | 15,783 |
Derivative liabilities |  |  | 17,902 |  |  |  | 7,892 |
Other |  |  | 17,357 |  |  |  | 16,617 |
Total |  | $ | 210,230 |  |  | $ | 175,855 |

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- Definition The entire disclosure for supplemental balance sheet disclosures, including descriptions and amounts for assets, liabilities, and equity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//210/tableOfContent + Details
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