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General Revenue (Tables)
 3 Months Ended
Mar. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Major Streams of Revenue
The major streams of revenue for SJW Group are as follows:
 
Three months ended March 31,
 
2019
 
2018
Revenue from contracts with customers
$
78,926

 
75,869

Alternative revenue programs, net - WCMA
(1,979
)
 
(332
)
Other balancing and memorandum accounts revenue, net
(631
)
 
(1,836
)
Rental income
1,366

 
1,341

 
$
77,682

 
75,042