Earnings Per Share / Capital Stock- Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Additional disclosure
Exercise of stock options and other issuance of Common Shares	18,371	25,956	47,182
Proceeds from Stock Options Exercised, Distributed to Subsidiaries	$ 0	$ 0	$ 0
Dividend Reinvestment Plan Common Stock Capital Shares Reserved for Future Issuance	1,055,948
Common Shares authorized for issuance but unissued under 401(k) Plan	387,300
GSWC
Additional disclosure
Exercise of stock options and other issuance of Common Shares	1	0	0
Stock Issued During Period, Value, New Issues	$ 10,000,000