v3.26.1
Regulatory Assets and Liabilities (Tables)
 6 Months Ended
Jun. 30, 2026
Regulated Operations [Abstract]  
Schedule of Regulatory Assets and Liabilities
Regulatory assets and liabilities were comprised of the following as of June 30, 2026 and December 31, 2025:
 Recovery PeriodJune 30, 2026December 31, 2025
Regulatory Assets  
Property-related temporary differences (tax benefits flowed through to customers)Indefinite$199,465 $199,465 
M-WRAM long-term regulatory asset
1 - 2 years
24,152 12,876 
IRMA long-term accounts receivableVarious21,216 22,077 
Other accrued benefitsIndefinite28,398 26,263 
Asset retirement obligations, netIndefinite31,577 30,073 
Tank coatingVarious18,584 19,495 
General District Balancing Account (GDBA) long-term accounts receivableVarious588 9,844 
Customer Assistance Program and Rate Support Fund accounts receivable
1 year
254 2,651 
Net WRAM and Modified Cost Balancing Account (MCBA) long-term accounts receivable— 4,078 
Incremental Cost Balancing Accounts (ICBA)
1 year
3,646 4,722 
Recoverable property lossesVarious1,765 2,051 
Other regulatory assetsVarious5,064 6,270 
Total Regulatory Assets$334,709 $339,865 
Regulatory Liabilities  
Cost of removal$537,504 $523,813 
Pension and retiree group health217,692 219,133 
Future tax benefits due to customers102,508 103,662 
Other components of net periodic benefit cost28,214 24,248 
ICBA4,257 2,144 
PFAS settlement proceeds4,293 25,193 
Pension Cost Balancing Account (PCBA)1,247 17,837 
Conservation Expense Balancing Account (CEBA)3,153 5,202 
Net WRAM and MCBA long-term payable— 3,117 
Health Cost Balancing Account (HCBA)1,835 4,149 
Other regulatory liabilities3,202 1,316 
Total Regulatory Liabilities$903,905 $929,814