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Selected Balance Sheet Information: | 9 Months Ended
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Sep. 30, 2022
Selected Balance Sheet Information [Abstract] |
Selected Balance Sheet Information | Selected Balance Sheet Information Accounts Receivable and Allowance for Credit Losses Following is a summary of Accounts receivable, net included in the accompanying Condensed Consolidated Balance Sheets (in thousands) as of:
| September 30, 2022 |  | December 31, 2021
Billed Accounts Receivable | $ | 168,757 |  |  | $ | 181,027 |
Unbilled Revenue | 82,925 |  |  | 142,738 |
Less: Allowance for Credit Losses | (1,935) |  |  | (2,113) |
Accounts Receivable, net | $ | 249,747 |  |  | $ | 321,652 |
Changes to allowance for credit losses for the nine months ended September 30, 2022 and 2021, respectively, were as follows (in thousands):
|  | Balance at Beginning of Year |  |  |  | Additions Charged to Costs and Expenses |  | Recoveries and Other Additions |  | Write-offs and Other Deductions |  | Balance at September 30,
2022 |  | $ | 2,113 |  |  |  |  | $ | 6,473 |  |  | $ | 2,117 |  |  | $ | (8,768) |  |  | $ | 1,935 |
2021 |  | $ | 7,003 |  |  |  |  | $ | 1,111 |  |  | $ | 2,420 |  |  | $ | (8,222) |  |  | $ | 2,312 |
Materials, Supplies and Fuel The following amounts by major classification are included in Materials, supplies and fuel on the accompanying Condensed Consolidated Balance Sheets (in thousands) as of:
| September 30, 2022 |  | December 31, 2021
Materials and supplies | $ | 95,390 |  |  | $ | 86,400 |
Fuel - Electric Utilities | 1,362 |  |  | 1,267 |
Natural gas in storage | 126,410 |  |  | 63,312 |
Total materials, supplies and fuel | $ | 223,162 |  |  | $ | 150,979 |
Accrued Liabilities The following amounts by major classification are included in Accrued liabilities on the accompanying Condensed Consolidated Balance Sheets (in thousands) as of:
| September 30, 2022 |  | December 31, 2021
Accrued employee compensation, benefits and withholdings | $ | 64,855 |  |  | $ | 74,387 |
Accrued property taxes | 46,513 |  |  | 50,874 |
Customer deposits and prepayments | 44,254 |  |  | 48,814 |
Accrued interest | 46,408 |  |  | 33,680 |
Other (none of which is individually significant) | 48,805 |  |  | 37,004 |
Total accrued liabilities | $ | 250,835 |  |  | $ | 244,759 |

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- Definition Selected Balance Sheet Information [Abstract] + References No definition available. + Details
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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 -Publisher FASB -Name Accounting Standards Codification -Topic 210 -URI https://asc.fasb.org/topic&trid=2122208 + Details
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