REGULATORY ASSETS AND LIABILTIES (Tables)

12 Months Ended

Dec. 31, 2020

Regulated Operations [Abstract]

Schedule of regulatory assets and liabilities

Regulatory assets and liabilities were comprised of the following as of December 31:

	Recovery Period	2020		2019
Regulatory Assets
Pension and retiree group health	Indefinitely	$	59,588	$	208,321
Property-related temporary differences (tax benefits flowed through to customers)	Indefinitely	120,365		104,931
Other accrued benefits	Indefinitely	21,692		20,030
Net WRAM and MCBA long-term accounts receivable	1-2 years	33,136		25,465
Asset retirement obligations, net	Indefinitely	21,110		19,567
IRMA long-term accounts receivable	1-2 years	14,705		4,642
Tank coating	10 years	14,018		13,535
Recoverable property losses	9 years	4,531		5,000
PCBA	1 year	19,647		21,465
Other components of net periodic benefit cost	Indefinitely	6,736		5,145
General district balancing account receivable	1 year	1,830		425
Low-income rate assistance (LIRA) and Rate support fund (RSF) accounts receivable	1 year	5,310		787
Other regulatory assets	Various	2,708		4,009
Total Regulatory Assets		$	325,376	$	433,322
Regulatory Liabilities
Future tax benefits due to customers		$	151,011	$	194,501
Retiree group health		18,472		—
HCBA		5,320		4,271
Conservation program		3,837		2,742
Net WRAM and MCBA long-term payable		479		211
1,2,3 trichloropropane settlement proceeds		—		8,426
Other regulatory liabilities		1,599		1,262
Total Regulatory Liabilities		$	180,718	$	211,413

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