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General Revenue (Tables)
 9 Months Ended
Sep. 30, 2018
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 September 30,
 
Nine months ended September 30,
 
2018
 
2017
 
2018
 
2017
Revenue from contracts with customers
$
120,007

 
125,722

 
$
294,319

 
290,146

Alternative revenue programs, net - WCMA
4,193

 
1,333

 
7,794

 
11,248

Other balancing and memorandum accounts revenue, net *
(788
)
 
(3,868
)
 
(7,235
)
 
(9,979
)
Rental income
1,441

 
1,391

 
4,103

 
4,281

 
$
124,853

 
124,578

 
$
298,981

 
295,696

*    The balances for three and nine months ended September 30, 2018, exclude $2,527 and $3,556, respectively, of amounts related to cost-recovery balancing accounts which upon adoption of Topic 606 are recorded as capitalized costs rather than revenue until recovery is approved by the CPUC. Prior to adoption of Topic 606, these amounts were recorded as revenue. For further discussion, please see Note 9.