Segment Information (Company's Segment Information, Assets) (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Total assets	$ 15,046,164	$ 14,658,278
Other [Member]
Segment Reporting Information [Line Items]
Total assets	278,886	294,090
Regulated [Member] | Water [Member]
Segment Reporting Information [Line Items]
Total assets	8,645,314	8,403,586
Regulated [Member] | Natural Gas [Member]
Segment Reporting Information [Line Items]
Total assets	$ 6,121,964	$ 5,960,602