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Dividend Limitations (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Dividend limitations
Common shareholder’s equity	$ 685,947	$ 641,673	$ 601,530	$ 558,223
Reinvested earnings in the business	427,505	385,007
AWR
Dividend limitations
Common shareholder’s equity	685,947	641,673
Subsidiaries
Dividend limitations
Dividends paid	38,300	47,300	42,700
GSWC
Dividend limitations
Dividends paid	38,300	22,500	20,200
Common shareholder’s equity	$ 615,686	583,298	551,188	503,575
Ratio of Indebtedness to Net Capital	0.4288
Reinvested earnings in the business	$ 259,156	228,392
GSWC | Maximum
Dividend limitations
Ratio of Indebtedness to Net Capital	0.6667
Earnings Reinvested in the Business
Dividend limitations
Common shareholder’s equity	$ 427,505	385,007	345,964	304,534
Earnings Reinvested in the Business | GSWC
Dividend limitations
Common shareholder’s equity	$ 259,156	$ 228,392	$ 257,434	$ 211,163

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