Regulatory Assets and Liabilities (Tables)

3 Months Ended

Mar. 31, 2025

Regulated Operations [Abstract]

Schedule of Regulatory Assets and Liabilities

Regulatory assets and liabilities were comprised of the following as of March 31, 2025 and December 31, 2024:

	Recovery Period	March 31, 2025		December 31, 2024
Regulatory Assets
Property-related temporary differences (tax benefits flowed through to customers)	Indefinite	$	178,279	$	178,279
IRMA long-term accounts receivable	Various	41,690		46,278
Asset retirement obligations, net	Indefinite	29,599		28,883
MWRAM long-term regulatory asset	1 - 2 years	28,750		16,353
Other accrued benefits	Indefinite	26,671		25,439
Tank coating	Various	20,822		21,477
Customer Assistance Program and Rate Support Fund accounts receivable	1 year	10,529		9,910
General District Balancing Account receivable	Various	9,499		9,393
Incremental Cost Balancing Accounts (ICBA)	1 year	8,023		8,251
Net WRAM and Modified Cost Balancing Account (MCBA) long-term accounts receivable	Various	3,460		3,633
Recoverable property losses	Various	2,463		2,633
Other regulatory assets	Various	7,446		6,877
Total Regulatory Assets		$	367,231	$	357,406
Regulatory Liabilities
Cost of removal		$	493,688	$	483,108
Pension and retiree group health		174,341		174,708
Future tax benefits due to customers		105,402		106,184
Other components of net periodic benefit cost		19,645		18,287
Pension Cost Balancing Account		15,091		14,143
ICBA		5,700		6,003
Health Cost Balancing Account		4,458		3,630
Conservation Expense Balancing Account		3,199		3,294
Net WRAM and MCBA long-term payable		3,075		3,064
Other regulatory liabilities		1,996		2,130
Total Regulatory Liabilities		$	826,595	$	814,551