XML 40 R29.htm IDEA: XBRL DOCUMENT v3.25.3
Select Balance Sheet Information (Tables)
 9 Months Ended
Sep. 30, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Schedule of Receivables
Receivables as of September 30, 2025 and December 31, 2024 are as follows:
(in thousands)September 30,
2025		December 31,
2024
Receivables
Trade$140,890 $112,169 
Other10,593 13,799 
Unbilled Receivables16,968 21,916 
Total Receivables168,451 147,884 
Less: Allowance for Credit Losses1,757 1,920 
Receivables, net of allowance for credit losses$166,694 $145,964 
Schedule of Activity in Allowance for Credit Losses
The following is a summary of activity in the allowance for credit losses for the nine months ended September 30, 2025 and 2024:
(in thousands)20252024
Beginning Balance, January 1$1,920 $2,522 
Additions Charged to Expense1,134 904 
Reductions for Amounts Written Off, Net of Recoveries(1,297)(1,476)
Ending Balance, September 30
$1,757 $1,950 
Schedule of Inventories
Inventories consist of the following as of September 30, 2025 and December 31, 2024:
(in thousands)September 30,
2025		December 31,
2024
Finished Goods
$39,146 $43,345 
Work in Process24,174 22,637 
Raw Material, Fuel and Supplies
92,445 82,903 
Total Inventories$155,765 $148,885 
Schedule of Investments
The following is a summary of our investments as of September 30, 2025 and December 31, 2024:
(in thousands)September 30,
2025		December 31,
2024
Short-term Investments
Government Debt Securities
$53,482 $753 
Corporate Debt Securities
395 — 
Total Short-term Investments
53,877 753 
Long-term Investments
Corporate-Owned Life Insurance Policies50,027 47,895 
Government Debt Securities
9,022 60,378 
Corporate Debt Securities
895 1,628 
Mutual Funds16,454 10,653 
Money Market Funds1,237 596 
Other Investments27 27 
Total Long-term Investments
77,662 121,177 
Total Investments$131,539 $121,930 
Schedule of Amortized Costs and Fair Value of Debt Securities, Available-for-Sale The following table summarizes the amortized cost and fair value of available-for-sale debt securities and the corresponding amounts of gross unrealized gains and losses as of September 30, 2025 and December 31, 2024:
September 30, 2025
(in thousands)
Amortized Cost
Gross Unrealized Gains
Gross Unrealized (Losses)
Fair Value
Government Debt Securities$61,967 $586 $(49)$62,504 
Corporate Debt Securities1,280 12 (2)1,290 
Total
$63,247 $598 $(51)$63,794 
December 31, 2024
(in thousands)
Amortized Cost
Gross Unrealized Gains
Gross Unrealized (Losses)
Fair Value
Government Debt Securities$60,891 $424 $(184)$61,131 
Corporate Debt Securities1,629 9 (10)1,628 
Total
$62,520 $433 $(194)$62,759 
Schedule of Investments Classified by Contractual Maturity Date
The following table summarizes the fair value of available-for-sale debt securities by contractual maturity date as of September 30, 2025:
(in thousands)September 30, 2025
Due in one year or less
$53,877 
Due in one to five years
9,917 
Total$63,794 
Schedule of Property, Plant and Equipment
Major classes of property, plant and equipment as of September 30, 2025 and December 31, 2024 include:
(in thousands)September 30,
2025		December 31,
2024
Electric Plant  
Electric Plant in Service$3,234,585 $3,180,943 
Construction Work in Progress334,457 231,890 
Total Gross Electric Plant3,569,042 3,412,833 
Less Accumulated Depreciation and Amortization921,038 899,049 
Net Electric Plant2,648,004 2,513,784 
Nonelectric Property, Plant and Equipment
Nonelectric Property, Plant and Equipment in Service401,193 362,565 
Construction Work in Progress12,223 40,536 
Total Gross Nonelectric Property, Plant and Equipment413,416 403,101 
Less Accumulated Depreciation and Amortization240,731 224,425 
Net Nonelectric Property, Plant and Equipment172,685 178,676 
Net Property, Plant and Equipment$2,820,689 $2,692,460