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Regulatory Matters 5 (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
USD ($)
unit
Dec. 31, 2020
USD ($)
Regulatory matters:    
Net regulatory assets $ (22,796) $ 16,539
Bear Valley Electric Service, Inc.    
Regulatory matters:    
Number of renewable energy credits that would be purchased | unit 578,000  
Incremental vegetation management costs $ 5,800  
Regulatory Asset Wildfire Mitigation Plans WMP 2,800  
Regulatory Asset CEMA Storm $ 455  
Bear Valley Electric Service, Inc. | Renewables Portfolio Standard [Member]    
Regulatory matters:    
Derivative, Term of Contract 10 years  
GSWC    
Regulatory matters:    
Net regulatory assets $ (24,082) 12,373
Various refunds to customers | Bear Valley Electric Service, Inc.    
Regulatory matters:    
Net regulatory assets (8,189) (6,822)
Various refunds to customers | GSWC    
Regulatory matters:    
Net regulatory assets $ (2,680) $ (4,577)