v3.24.3
Segment Information (Company's Segment Information, Continuing Operations) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2024
Jun. 30, 2024
Mar. 31, 2024
Sep. 30, 2023
Jun. 30, 2023
Mar. 31, 2023
Sep. 30, 2024
Sep. 30, 2023
Segment Reporting Information [Line Items]                
Operating revenues $ 435,255     $ 411,255     $ 1,481,730 $ 1,574,405
Operations and maintenance expense 144,368     147,018     423,780 418,520
Purchased gas 19,095     16,590     182,498 314,838
Depreciation and amortization 92,601     86,035     273,051 255,490
Interest expense, net (a) 75,452     67,648     220,505 207,709
Allowance for funds used during construction (5,593)     (5,455)     (15,503) (14,567)
Provision for income taxes (benefit) 15,840     (3,711)     7,062 (35,611)
Net income (loss) 69,402 $ 75,385 $ 265,772 80,076 $ 91,268 $ 191,434 410,559 362,778
Capital expenditures             932,498 874,491
Regulated Water [Member] | Regulated [Member]                
Segment Reporting Information [Line Items]                
Operating revenues 334,477     310,591     916,850 871,563
Operations and maintenance expense 96,369     98,695     282,627 274,724
Depreciation and amortization 57,877     54,695     172,696 161,393
Interest expense, net (a) 35,094     30,867     104,334 91,103
Allowance for funds used during construction (4,326)     (4,643)     (11,976) (12,529)
Provision for income taxes (benefit) 19,289     16,186     54,604 45,559
Net income (loss) 112,275     99,916     263,859 267,345
Capital expenditures             495,259 493,851
Regulated Natural Gas [Member] | Regulated [Member]                
Segment Reporting Information [Line Items]                
Operating revenues 96,731     94,798     549,250 675,076
Operations and maintenance expense 49,002     50,006     144,628 148,270
Purchased gas 17,603     14,408     175,825 295,929
Depreciation and amortization 34,318     31,141     99,361 93,457
Interest expense, net (a) 22,121     19,405     68,346 67,894
Allowance for funds used during construction (1,267)     (812)     (3,527) (2,038)
Provision for income taxes (benefit) 228     (16,905)     (38,752) (73,703)
Net income (loss) (30,660)     (9,776)     177,563 127,400
Capital expenditures             436,807 377,562
Other [Member]                
Segment Reporting Information [Line Items]                
Operating revenues 4,047     5,866     15,630 27,766
Operations and maintenance expense (1,003)     (1,683)     (3,475) (4,474)
Purchased gas 1,492     2,182     6,673 18,909
Depreciation and amortization 406     199     994 640
Interest expense, net (a) 18,237     17,376     47,825 48,712
Provision for income taxes (benefit) (3,677)     (2,992)     (8,790) (7,467)
Net income (loss) $ (12,213)     $ (10,064)     (30,863) (31,967)
Capital expenditures             $ 432 $ 3,078