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Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2021

Accounting Policies [Abstract]

Schedule of Inventories

Inventories consist of the following as of December 31, 2021 and 2020:

(in thousands)			2021						2020
Finished Goods			$	39,903					$	22,046
Work in Process			35,705						16,210
Raw Material, Fuel and Supplies			72,882						53,909
Total Inventories			$	148,490					$	92,165

Schedule of Investments

The following is a summary of our investments at December 31, 2021 and 2020:

(in thousands)			2021						2020
Corporate-Owned Life Insurance Policies			$	41,078					$	36,825
Corporate and Government Debt Securities			9,202						9,260
Mutual Funds			5,432						1,662
Money Market Funds			949						4,075
Other Investments			29						34
Total Investments			$	56,690					$	51,856

Schedule of Estimated Service Lives For Rate-Regulated and Nonelectric Assets

The estimated service lives for rate-regulated electric assets and nonelectric assets are included below:

			Service Life Range
(years)			Low						High
Electric Assets:
Production Plant			9						83
Transmission Plant			51						75
Distribution Plant			16						70
General Plant			5						60
Nonelectric Assets:
Equipment			2						12
Buildings and Leasehold Improvements			5						40

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