Revenues (Tables)

12 Months Ended

Dec. 31, 2019

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue [Table Text Block]

(dollar in thousands)	For The Year Ended December 31, 2019		For The Year Ended December 31, 2018
Water:
Tariff-based revenues	$	305,244	$	298,818
CPUC-approved surcharges (cost-recovery activities)	4,322		2,962
Other	2,006		1,813
Water revenues from contracts with customers	311,572		303,593
WRAM under/(over)-collection (alternative revenue program)	8,258		(8,335		)
Total water revenues	319,830		295,258
Electric:
Tariff-based revenues	36,628		34,501
CPUC-approved surcharges (cost-recovery activities)	410		214
Electric revenues from contracts with customers	37,038		34,715
BRRAM under/(over)-collection (alternative revenue program)	2,510		(365		)
Total electric revenues	39,548		34,350
Contracted services:
Water	59,868		62,273
Wastewater	54,623		44,935
Contracted services revenues from contracts with customers	114,491		107,208
Total revenues	$	473,869	$	436,816

Contract with Customer, Asset and Liability [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, 2019		December 31, 2018
Unbilled receivables	$	10,467	$	5,696
Receivable from the U.S. government	$	64,819	$	61,126
Contract assets	$	15,631	$	24,447
Contract liabilities	$	11,167	$	7,530