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(Loss) Earnings Per Share of Common Stock
3 Months Ended
Mar. 31, 2023
Earnings Per Share [Abstract]  
(Loss) Earnings Per Share of Common Stock arnings Per Share of Common Stock
The computations of basic and diluted (loss) earnings per share of common stock are noted in the table below. Basic (loss) earnings per share of common stock is computed by dividing the net (loss) income attributable to California Water Service Group by the weighted average number of common shares outstanding during the period. RSAs are included in the weighted average common shares outstanding because the shares have all the same voting and dividend rights as issued and unrestricted common stock. Certain outstanding equity instruments are not included in the diluted (loss) earnings per share calculation because their inclusion would have been anti-dilutive.
 Three Months Ended March 31
 20232022
(In thousands, except per share data)
Net (loss) income$(22,334)$894 
Net loss attributable to noncontrolling interests$(123)$(192)
Net loss attributable to California Water Service Group$(22,211)$1,086 
Weighted average common shares outstanding, basic55,666 53,731 
Weighted average common shares outstanding, dilutive55,666 53,775 
(Loss) earnings per share of common stock - basic$(0.40)$0.02 
(Loss) earnings per share of common stock - diluted $(0.40)$0.02