v3.26.1
Consolidated Statements Of Income And Earnings Reinvested In The Business (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
INCOME        
Operating Revenues $ 537,497 $ 531,830 $ 2,047,377 $ 1,811,262
Operating Expenses:        
Purchased Gas [1] 29,878 27,986 323,335 228,661
Property, Franchise and Other Taxes 22,482 24,180 72,519 71,450
Depreciation, Depletion and Amortization [1] 121,058 116,408 362,412 337,055
Impairment of Assets 0 0 0 141,802 [1]
Total Operating Expenses 328,557 301,578 1,215,178 1,177,568
Operating Income 208,940 230,252 832,199 633,694
Other Income (Expense):        
Other Income (Deductions) 11,866 8,534 37,100 31,486
Interest Expense on Long-Term Debt (33,181) (34,333) (96,776) (107,356)
Other Interest Expense (2,831) (3,556) (16,344) (13,033)
Income Before Income Taxes 184,794 200,897 756,179 544,791
Income Tax Expense [1] 46,173 51,079 188,245 133,629
Net Income Available for Common Stock 138,621 149,818 567,934 411,162
EARNINGS REINVESTED IN THE BUSINESS        
Balance at Beginning of Period 2,340,168 1,855,366 2,012,529 1,727,326
Beginning Retained Earnings Unappropriated And Current Period Net Income 2,478,789 2,005,184 2,580,463 2,138,488
Dividends on Common Stock (52,745) (48,340) (154,419) (141,566)
Balance at June 30 $ 2,426,044 $ 1,953,533 $ 2,426,044 $ 1,953,533
Basic:        
Net Income Available for Common Stock (in dollars per share) $ 1.46 $ 1.66 $ 6.06 $ 4.54
Diluted:        
Net Income Available for Common Stock (in dollars per share) $ 1.45 $ 1.64 $ 6.01 $ 4.51
Weighted Average Common Shares Outstanding:        
Used in Basic Calculation (shares) 95,034,935 90,358,018 93,730,191 90,546,228
Used in Diluted Calculation (shares) 95,736,482 91,139,556 94,445,771 91,247,547
Dividends Per Common Share:        
Dividends Declared (in dollars per share) $ 0.555 $ 0.535 $ 1.625 $ 1.565
Earnings Reinvested in The Business        
Other Income (Expense):        
Net Income Available for Common Stock $ 138,621 $ 149,818 $ 567,934 $ 411,162
EARNINGS REINVESTED IN THE BUSINESS        
Share Repurchases 0 (3,311) 0 (43,389)
Dividends on Common Stock (52,745) (48,340) (154,419) (141,566)
Utility        
INCOME        
Operating Revenues 165,422 157,446 850,258 729,445
Operating Expenses:        
Operation and Maintenance 60,592 56,053 187,549 174,744
Integrated Upstream and Gathering and Other        
Operating Expenses:        
Operation and Maintenance 63,534 47,137 180,904 137,312
Integrated Upstream and Gathering        
INCOME        
Operating Revenues 302,516 306,402 984,561 873,901
Pipeline and Storage        
INCOME        
Operating Revenues 69,559 67,982 212,558 207,916
Operating Expenses:        
Operation and Maintenance $ 31,013 $ 29,814 $ 88,459 $ 86,544
[1] The Company considers this line to be a significant expense.