SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2019

In the following table, revenue from contracts with customers is disaggregated by class of customers for the years ended December 31, 2019, 2018, and 2017:



	2019		2018		2017
Residential	$	446,323	$	450,062	$	415,893
Business	129,223		130,041		118,279
Industrial	31,857		34,236		28,905
Public authorities	33,862		34,511		31,671
Other*	23,093		25,886		27,726
Total revenue from contracts with customers	$	664,358	$	674,736	$	622,474

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* Other includes accrued unbilled revenue

The following tables disaggregate the Company’s non-regulated revenue by source for the years ended December 31, 2019, 2018, and 2017:



	2019		2018		2017
Operating and maintenance revenue	$	12,655	$	10,392	$	8,621
Other non-regulated revenue	4,271		5,413		5,262
Non-regulated revenue from contracts with customers	$	16,926	$	15,805	$	13,883
Lease revenue	2,279		2,467		2,015
Total non-regulated revenue	$	19,205	$	18,272	$	15,898

The following table disaggregates the Company’s operating revenue by source for the years ended December 31, 2019, 2018, and 2017:



	2019		2018		2017
Revenue from contracts with customers	$	664,358	$	674,736	$	622,474
Regulatory balancing account revenue	50,199		23,460		53,639
Total operating revenue	$	714,557	$	698,196	$	676,113

Schedule of lease payments to be received

Maturities of lease payments to be received are as follows:



Year Ending December 31,	Operating Leases
2020	$	2,772
2021	2,012
2022	1,211
2023	725
2024	411
Thereafter	585

Schedule of activities in the allowance for doubtful accounts

The activities in the allowance for doubtful accounts were as follows:



	2019			2018			2017
Beginning Balance	$	757		$	773		$	830
Provision for uncollectible accounts	1,664			1,703			1,570
Net write off of uncollectible accounts	(1,650		)	(1,719		)	(1,627		)
Ending Balance	$	771		$	757		$	773

Other Receivables

As of December 31, 2019 and 2018, other receivables were:



	2019		2018
Accounts receivable from developers	$	6,299	$	9,633
Other	7,888		7,468
Total other receivables	$	14,187	$	17,101

Schedule of depreciable plant and equipment

The following table represents depreciable plant and equipment as of December 31:



	2019		2018
Equipment	$	726,475	$	643,581
Office buildings and other structures	281,462		267,948
Transmission and distribution plant	2,227,478		2,038,895
Total	$	3,235,415	$	2,950,424

Schedule of estimated useful lives of depreciable plant and equipment

Depreciation of utility plant is computed on a straight-line basis over the assets' estimated useful lives including cost of removal of certain assets as follows:



	Useful Lives
Equipment	5 to 50 years
Transmission and distribution plant	40 to 65 years
Office Buildings and other structures	50 years

Schedule of allowance for funds used during construction

The amount of AFUDC related to equity funds and to borrowed funds for 2019, 2018, and 2017 are shown in the table below:



	2019		2018		2017
Allowance for equity funds used during construction	$	6,685	$	3,954	$	3,750
Allowance for borrowed funds used during construction	3,670		2,063		2,360
Total	$	10,355	$	6,017	$	6,110

Schedule of cash, cash equivalents and restricted cash

The following table provides a reconciliation of cash, cash equivalents, and restricted cash within the Consolidated Balance Sheets that total to the amounts shown on the Consolidated Statements of Cash Flows:



	December 31, 2019		December 31, 2018
Cash and cash equivalents	42,653		47,176
Restricted cash (included in "taxes, prepaid expenses, and other assets")	645		539
Total cash, cash equivalents, and restricted cash shown in the statements of cash flows	$	43,298	$	47,715

Schedule of regulatory assets and liabilities

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



	Recovery Period	2019		2018
Regulatory Assets
Pension and retiree group health	Indefinitely	$	208,321	$	156,947
Property-related temporary differences (tax benefits flowed through to customers)	Indefinitely	104,931		99,376
Other accrued benefits	Indefinitely	20,030		20,588
Net WRAM and MCBA long-term accounts receivable	1-2 years	25,465		17,134
Asset retirement obligations, net	Indefinitely	19,567		18,197
Interim rates long-term accounts receivable	1 year	4,642		4,642
Tank coating	10 years	13,535		11,196
Recoverable property losses	10 years	5,000		1,275
Pension cost balancing account	1 year	21,465		16,494
Other components of net periodic benefit cost	Indefinitely	5,145		3,221
Other regulatory assets	Various	5,221		4,499
Total Regulatory Assets		$	433,322	$	353,569
Regulatory Liabilities
Future tax benefits due to customers		$	194,501	$	180,205
Health cost balancing account		4,271		3,516
Conservation program		2,742		6,880
Net WRAM and MCBA long-term payable		211		222
Tax accounting memorandum account		806		5,039
Cost of capital memorandum account		151		2,834
1,2,3 trichloropropane settlement proceeds		8,426		12,142
Other regulatory liabilities		305		437
Total Regulatory Liabilities		$	211,413	$	211,275

Schedule Of Customer Advances For Construction, Refunds Due [Table Text Block]

Estimated refunds of advances are shown in the table below.



Year Ending December 31,	Refunds of Advances
2020	$	7,628
2021	7,627
2022	7,627
2023	7,627
2024	7,627
Thereafter	152,926
Total refunds	$	191,062

Schedule of SARs which were dilutive



	2019		2018		2017
	(In thousands, except per share data)
Net income available to common stockholders	$	63,116	$	65,584	$	72,940
Weighted average common shares, basic	48,168		48,060		48,009
Weighted average common shares, dilutive	48,168		48,060		48,009
Earnings per share—basic	$	1.31	$	1.36	$	1.52
Earnings per share—diluted	$	1.31	$	1.36	$	1.52