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Business and assets acquisitions - Schedule of Preliminary Allocation Of The Acquisition Prices Of Assets Acquired and Liabilities Assumed (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Jan. 01, 2022
Dec. 31, 2021
Business Acquisition [Line Items]      
Goodwill $ 1,297,597   $ 1,201,244
New York Water Company, Inc      
Business Acquisition [Line Items]      
Working capital   $ 4,703  
Property, plant and equipment   517,591  
Goodwill   95,181  
Regulatory assets   68,379  
Other assets   4,507  
Pension and other post-employment obligations   (13,402)  
Regulatory liabilities   (59,636)  
Other liabilities   (8,026)  
Total net assets acquired   609,297  
Cash and cash equivalents   49  
Net assets acquired, net of cash and cash equivalents   $ 609,248