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Selected Balance Sheet Information: | 6 Months Ended
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Jun. 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:
| June 30, 2022 |  | December 31, 2021
Billed Accounts Receivable | $ | 188,649 |  |  | $ | 181,027 |
Unbilled Revenue | 81,647 |  |  | 142,738 |
Less: Allowance for Credit Losses | (3,193) |  |  | (2,113) |
Accounts Receivable, net | $ | 267,103 |  |  | $ | 321,652 |
Changes to allowance for credit losses for the six months ended June 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 June 30,
2022 |  | $ | 2,113 |  |  |  |  | $ | 4,239 |  |  | $ | 1,266 |  |  | $ | (4,425) |  |  | $ | 3,193 |
2021 |  | $ | 7,003 |  |  |  |  | $ | 1,510 |  |  | $ | 1,786 |  |  | $ | (4,270) |  |  | $ | 6,029 |
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:
| June 30, 2022 |  | December 31, 2021
Materials and supplies | $ | 91,736 |  |  | $ | 86,400 |
Fuel - Electric Utilities | 2,169 |  |  | 1,267 |
Natural gas in storage | 58,959 |  |  | 63,312 |
Total materials, supplies and fuel | $ | 152,864 |  |  | $ | 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:
| June 30, 2022 |  | December 31, 2021
Accrued employee compensation, benefits and withholdings | $ | 64,417 |  |  | $ | 74,387 |
Accrued property taxes | 42,944 |  |  | 50,874 |
Customer deposits and prepayments | 43,151 |  |  | 48,814 |
Accrued interest | 33,764 |  |  | 33,680 |
Other (none of which is individually significant) | 42,044 |  |  | 37,004 |
Total accrued liabilities | $ | 226,320 |  |  | $ | 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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