Revenues (Tables)

12 Months Ended

Dec. 31, 2022

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue [Table Text Block]

(dollar in thousands)	For The Year Ended December 31, 2022		For The Year Ended December 31, 2021		For The Year Ended December 31, 2020
Water:
Tariff-based revenues	$	324,838	$	345,562	$	329,670
CPUC-approved surcharges (cost-recovery activities)	2,461		3,280		3,736
Other	2,351		2,227		2,100
Water revenues from contracts with customers	329,650		351,069		335,506
WRAM under/(over)-collection (alternative revenue program)	10,952		(3,957)		(4,869)
Total water revenues	340,602		347,112		330,637
Electric:
Tariff-based revenues	39,750		37,124		35,283
CPUC-approved surcharges (cost-recovery activities)	144		310		686
Electric revenues from contracts with customers	39,894		37,434		35,969
BRRAM under-collection (alternative revenue program)	92		911		1,055
Total electric revenues	39,986		38,345		37,024
Contracted services:
Water	68,626		71,210		74,898
Wastewater	42,314		42,186		45,684
Contracted services revenues from contracts with customers	110,940		113,396		120,582
Total revenues	$	491,528	$	498,853	$	488,243

Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]

The opening and closing balances of the receivable from the U.S. government, contract assets and contract liabilities from contracts with customers, which related entirely to ASUS, are as follows:    

(dollar in thousands)	December 31, 2022		December 31, 2021
Unbilled receivables	$	10,125	$	14,835
Receivable from the U.S. government	$	85,456	$	79,818
Contract assets	$	14,982	$	9,587
Contract liabilities	$	903	$	257