Segment Information (Company's Segment Information, Assets) (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Segment Reporting Information [Line Items]
Total assets	$ 17,054,344	$ 16,841,459
Other [Member]
Segment Reporting Information [Line Items]
Total assets	364,556	489,762
Regulated [Member] | Regulated Water [Member]
Segment Reporting Information [Line Items]
Total assets	9,498,773	9,386,347
Regulated [Member] | Regulated Natural Gas [Member]
Segment Reporting Information [Line Items]
Total assets	$ 7,191,015	$ 6,965,350