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Select Balance Sheet Information (Tables) | 3 Months Ended
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Mar. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Schedule of Receivables | Receivables as of March 31, 2021 and December 31, 2020 are as follows:
(in thousands) | March 31, 2021 |  | December 31, 2020
Receivables |  |  |
Trade | $ | 112,060 |  |  | $ | 87,048 |
Other | 6,982 |  |  | 8,939 |
Unbilled Receivables | 18,331 |  |  | 21,187 |
Total Receivables | 137,373 |  |  | 117,174 |
Less Allowance for Credit Losses | 2,983 |  |  | 3,215 |
Receivables, net of allowance for credit losses | $ | 134,390 |  |  | $ | 113,959 |
Summary of Activity in Allowance for Credit Losses | The following is a summary of activity in the allowance for credit losses for the three months ended March 31, 2021 and 2020:
(in thousands) | 2021 |  | 2020
Beginning Balance, January 1 | $ | 3,215 |  |  | $ | 1,339 |
Additions Charged to Expense | 211 |  |  | 635 |
Reductions for Amounts Written-Off, Net of Recoveries | (443) |  |  | (293) |
Ending Balance, March 31 | $ | 2,983 |  |  | $ | 1,681 |
Schedule of Inventories | Inventories consist of the following as of March 31, 2021 and December 31, 2020:
(in thousands) | March 31, 2021 |  | December 31, 2020
Finished Goods | $ | 20,567 |  |  | $ | 22,046 |
Work in Process | 19,324 |  |  | 16,210 |
Raw Material, Fuel and Supplies | 52,535 |  |  | 53,909 |
Total Inventories | $ | 92,426 |  |  | $ | 92,165 |
Schedule of Investments | The following is a summary of our investments at March 31, 2021 and December 31, 2020:
(in thousands) | March 31, 2021 |  | December 31, 2020
Corporate-Owned Life Insurance Policies | $ | 38,205 |  |  | $ | 36,825 |
Debt Securities | 9,209 |  |  | 9,260 |
Money Market Funds | 1,862 |  |  | 4,075 |
Mutual Funds | 5,141 |  |  | 1,662 |
Other Investments | 29 |  |  | 34 |
Total Investments | $ | 54,446 |  |  | $ | 51,856 |
Schedule of Property, Plant and Equipment | Major classes of property, plant and equipment as of March 31, 2021 and December 31, 2020 include:
(in thousands) | March 31, 2021 |  | December 31, 2020
Electric Plant in Service |  |  |
Electric Plant in Service | 2,682,884 |  |  | 2,531,352 |
Construction Work in Progress | 77,676 |  |  | 203,078 |
Total Gross Electric Plant | 2,760,560 |  |  | 2,734,430 |
Less Accumulated Depreciation and Amortization | 796,161 |  |  | 778,988 |
Net Electric Plant | $ | 1,964,399 |  |  | $ | 1,955,442 |
Nonelectric Property, Plant and Equipment |  |  |
Nonelectric Property, Plant and Equipment in Service | 259,975 |  |  | 258,730 |
Construction Work in Progress | 12,086 |  |  | 9,290 |
Total Gross Nonelectric Property, Plant and Equipment | 272,061 |  |  | 268,020 |
Less Accumulated Depreciation and Amortization | 175,668 |  |  | 174,189 |
Net Nonelectric Property, Plant and Equipment | 96,393 |  |  | 93,831 |
Net Property, Plant and Equipment | $ | 2,060,792 |  |  | $ | 2,049,273 |

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