CONSOLIDATED STATEMENTS OF CHANGES IN COMMON SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	GSWC	Common Stock	Common Stock GSWC	Earnings Reinvested in the Business	Earnings Reinvested in the Business GSWC
Beginning Balance (in shares) at Dec. 31, 2019			36,847,000	165
Beginning Balance at Dec. 31, 2019	$ 601,530	$ 551,188	$ 255,566	$ 293,754	$ 345,964	$ 257,434
Add:
Net Income	86,425	64,971			86,425	64,971
Exercise of stock options and other issuance of Common Shares			42,000	5
Exercise of stock options and other issuance of Common Shares	30	60,000	$ 30	$ 60,000
Stock-based compensation, net of taxes paid from shares withheld from employees related to net share settlements	894	983	894	983
Dividend equivalent rights on stock-based awards not paid in cash	176	169	$ 176	$ 169
Deduct:
Dividends on Common Shares	47,206	22,500			47,206	22,500
Distribution of BVESI common shares to AWR parent		71,344				71,344
Dividend equivalent rights on stock-based awards	176	169			176	169
Ending Balance (in shares) at Dec. 31, 2020			36,889,000	170
Ending Balance at Dec. 31, 2020	641,673	583,298	$ 256,666	$ 354,906	385,007	228,392
Add:
Net Income	94,347	69,215			94,347	69,215
Exercise of stock options and other issuance of Common Shares			47,000	0
Exercise of stock options and other issuance of Common Shares	0		$ 0
Stock-based compensation, net of taxes paid from shares withheld from employees related to net share settlements	1,616	1,473	1,616	$ 1,473
Dividend equivalent rights on stock-based awards not paid in cash	160	151	$ 160	$ 151
Deduct:
Dividends on Common Shares	51,689	38,300			51,689	38,300
Dividend equivalent rights on stock-based awards	$ 160	$ 151			160	151
Ending Balance (in shares) at Dec. 31, 2021	36,936,285	170	36,936,000	170
Ending Balance at Dec. 31, 2021	$ 685,947	$ 615,686	$ 258,442	$ 356,530	427,505	259,156
Add:
Net Income	78,396	53,770			78,396	53,770
Exercise of stock options and other issuance of Common Shares			26,000	0
Exercise of stock options and other issuance of Common Shares	0		$ 0
Stock-based compensation, net of taxes paid from shares withheld from employees related to net share settlements	1,562	1,450	1,562	$ 1,450
Dividend equivalent rights on stock-based awards not paid in cash	154	143	$ 154	$ 143
Deduct:
Dividends on Common Shares	56,356	27,000			56,356	27,000
Dividend equivalent rights on stock-based awards	$ 154	$ 143			154	143
Ending Balance (in shares) at Dec. 31, 2022	36,962,241	170	36,962,000	170
Ending Balance at Dec. 31, 2022	$ 709,549	$ 643,906	$ 260,158	$ 358,123	$ 449,391	$ 285,783