Acquisition (Details) $ in Thousands	May 01, 2021 USD ($)	Dec. 31, 2021 USD ($)	May 31, 2021 wastewaterUtility connections	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Asset Acquisition [Line Items]
Goodwill		$ 36,814		$ 31,842	$ 2,959
BVRT Water Company
Asset Acquisition [Line Items]
Number Of Wastewater Utilities | wastewaterUtility			5
Number Of Connections Served | connections			3,800
Number Of Potential Customer Connections | connections			61,000
Hawaii Water Company | Hawaii Water Asset Acquisition
Asset Acquisition [Line Items]
Payments For Asset Acquisition	$ 4,200
Asset Acquisition, Assets Acquired	1,600
Asset Acquisition, Liabilities Assumed	300
Goodwill	$ 2,900