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Summary of Significant Accounting Policies (Tables)
 9 Months Ended
Sep. 30, 2025
Accounting Policies [Abstract]  
Disaggregation of Revenue
The following table disaggregates the Company’s operating revenue by source for the three and nine months ended September 30, 2025 and 2024:
Three Months Ended September 30, Nine Months Ended September 30,
2025202420252024
Revenue from contracts with customers$314,096 $306,237 $753,013 $687,803 
Regulatory balancing account revenue(2,861)(6,674)27,149 126,808 
Total operating revenue$311,235 $299,563 $780,162 $814,611 
In the following table, revenue from contracts with customers is disaggregated by class of customers for the three and nine months ended September 30, 2025 and 2024:
Three Months Ended September 30, Nine Months Ended September 30,
2025202420252024
Residential$186,699 $184,951 $434,061 $399,695 
Business56,284 56,225 144,926 132,680 
Multiple residential22,766 21,795 62,692 56,707 
Industrial11,098 9,645 24,032 23,404 
Public authorities19,039 18,140 41,295 36,020 
Other (a)18,210 15,481 46,007 39,297 
Total revenue from contracts with customers$314,096 $306,237 $753,013 $687,803 
(a) Other includes changes to accrued and unbilled revenues
The following table disaggregates the Company’s non-regulated revenue by source for the three and nine months ended September 30, 2025 and 2024:
Three Months Ended September 30, Nine Months Ended September 30,
2025202420252024
Contract operating and maintenance revenue
$3,546 $3,384 $10,052 $9,820 
Other non-regulated revenue1,218 143 3,557 3,092 
Non-regulated revenue from contracts with customers4,764 3,527 13,609 12,912 
Lease revenue585 606 1,732 1,832 
Total non-regulated revenue$5,349 $4,133 $15,341 $14,744 
Schedule of Allowance for Credit Losses
The following table presents the activity in the allowance for credit losses for the nine months ended September 30, 2025 and twelve months ended December 31, 2024:
September 30, 2025December 31, 2024
Beginning balance$4,128 $2,854 
Provision for credit loss expense2,861 5,890 
Write-offs(4,124)(5,054)
Recoveries445 438 
Total ending allowance balance$3,310 $4,128 
Schedule of Cash and Cash Equivalents
The following table provides a reconciliation of cash, cash equivalents, and restricted cash within the unaudited Condensed Consolidated Balance Sheets that sum to the total of the same such amounts shown on the unaudited Condensed Consolidated Statements of Cash Flows (see Note 9 for further details on restricted cash):
 September 30, 2025December 31, 2024
Cash and cash equivalents$75,990 $50,121 
Restricted cash45,620 45,566 
Total cash, cash equivalents, and restricted cash
$121,610 $95,687