v3.26.1
Consolidated Statements Of Income And Earnings Reinvested In The Business (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2026
Mar. 31, 2025
INCOME        
Operating Revenues $ 858,373 $ 729,950 $ 1,509,881 $ 1,279,432
Operating Expenses:        
Purchased Gas [1] 207,851 135,338 293,457 200,675
Property, Franchise and Other Taxes 25,274 25,214 50,037 47,270
Depreciation, Depletion and Amortization [1] 119,329 111,277 241,354 220,647
Impairment of Assets 0 0 0 141,802 [1]
Total Operating Expenses 511,238 412,698 886,621 875,989
Operating Income 347,135 317,252 623,260 403,443
Other Income (Expense):        
Other Income 17,002 15,232 25,235 22,952
Interest Expense on Long-Term Debt (30,083) (39,662) (63,596) (73,024)
Other Interest Expense (3,651) (5,095) (13,514) (9,476)
Income Before Income Taxes 330,403 287,727 571,385 343,895
Income Tax Expense [1] 82,735 71,369 142,072 82,551
Net Income Available for Common Stock 247,668 216,358 429,313 261,344
EARNINGS REINVESTED IN THE BUSINESS        
Balance at Beginning of Period 2,143,340 1,698,648 2,012,529 1,727,326
Beginning Retained Earnings Unappropriated And Current Period Net Income 2,391,008 1,915,006 2,441,842 1,988,670
Dividends on Common Stock (50,840) (46,555) (101,674) (93,226)
Balance at March 31 $ 2,340,168 $ 1,855,366 $ 2,340,168 $ 1,855,366
Basic:        
Net Income Available for Common Stock (in dollars per share) $ 2.61 $ 2.39 $ 4.61 $ 2.88
Diluted:        
Net Income Available for Common Stock (in dollars per share) $ 2.59 $ 2.37 $ 4.58 $ 2.86
Weighted Average Common Shares Outstanding:        
Used in Basic Calculation (shares) 95,026,278 90,500,162 93,077,818 90,640,333
Used in Diluted Calculation (shares) 95,691,950 91,176,327 93,805,419 91,312,334
Dividends Per Common Share:        
Dividends Declared (in dollars per share) $ 0.535 $ 0.515 $ 1.07 $ 1.030
Earnings Reinvested in The Business        
Other Income (Expense):        
Net Income Available for Common Stock $ 247,668 $ 216,358 $ 429,313 $ 261,344
EARNINGS REINVESTED IN THE BUSINESS        
Share Repurchases 0 (13,085) 0 (40,078)
Dividends on Common Stock (50,840) (46,555) (101,674) (93,226)
Utility        
INCOME        
Operating Revenues 425,788 343,574 684,837 571,998
Operating Expenses:        
Operation and Maintenance 67,060 63,447 126,957 118,691
Integrated Upstream and Gathering        
INCOME        
Operating Revenues 358,823 315,191 682,045 567,499
Pipeline and Storage        
INCOME        
Operating Revenues 73,762 71,185 142,999 139,935
Operating Expenses:        
Operation and Maintenance 30,660 30,153 57,446 56,730
Integrated Upstream and Gathering and Other        
Operating Expenses:        
Operation and Maintenance $ 61,064 $ 47,269 $ 117,370 $ 90,174
[1] The Company considers this line to be a significant expense.