Utility Plant and Intangible Assets 2 (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Intangible assets
Total amortized intangible assets		$ 31,938	$ 30,439
Less - accumulated amortization		(26,811)	(26,401)
Intangible assets, net of amortization		5,127	4,038
Unamortized intangible assets	[1]	383	400
Amortization of intangible assets		641	$ 700	$ 654
Estimated future consolidated amortization expenses related to intangible assets
2023		641
2024		641
2025		641
2026		641
2027		641
Total		$ 3,205
Conservation
Intangible assets
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		3 years	3 years
Total amortized intangible assets		$ 9,486	$ 9,486
Water and water service rights
Intangible assets
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		30 years	30 years
Total amortized intangible assets	[2]	$ 8,695	$ 8,695
Water planning studies
Intangible assets
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		14 years	14 years
Total amortized intangible assets		$ 13,757	$ 12,258
GSWC
Intangible assets
Total amortized intangible assets		30,129	28,629
Less - accumulated amortization		(25,374)	(25,109)
Intangible assets, net of amortization		4,755	3,520
Unamortized intangible assets	[1]	$ 382	$ 399
GSWC | Conservation
Intangible assets
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		3 years	3 years
Total amortized intangible assets		$ 9,486	$ 9,486
GSWC | Water and water service rights
Intangible assets
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		30 years	30 years
Total amortized intangible assets	[2]	$ 8,124	$ 8,124
GSWC | Water planning studies
Intangible assets
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		14 years	14 years
Total amortized intangible assets		$ 12,519	$ 11,019

[1] The intangible assets not subject to amortization primarily consist of organization and consent fees.

[2]    Includes intangible assets of $571,000 for contracted services included in “Other Property and Investments” on the consolidated balance sheets as of December 31, 2022 and 2021.