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Segment Information (Tables)
3 Months Ended
Dec. 31, 2022
Segment Reporting [Abstract]  
Schedule of Segment Reporting Information, by Segment
Income statements and capital expenditures for the three months ended December 31, 2022 and 2021 by segment are presented in the following tables:
 Three Months Ended December 31, 2022
 DistributionPipeline and StorageEliminationsConsolidated
 (In thousands)
Operating revenues from external parties$1,439,693 $44,316 $— $1,484,009 
Intersegment revenues733 142,313 (143,046)— 
Total operating revenues1,440,426 186,629 (143,046)1,484,009 
Purchased gas cost
881,915 (858)(142,808)738,249 
Operation and maintenance expense136,469 48,785 (238)185,016 
Depreciation and amortization expense105,664 40,356 — 146,020 
Taxes, other than income84,622 8,916 — 93,538 
Operating income231,756 89,430 — 321,186 
Other non-operating income6,774 14,417 — 21,191 
Interest charges22,839 13,921 — 36,760 
Income before income taxes
215,691 89,926 — 305,617 
Income tax expense21,223 12,534 — 33,757 
Net income$194,468 $77,392 $— $271,860 
Capital expenditures$443,544 $352,116 $— $795,660 

 Three Months Ended December 31, 2021
 DistributionPipeline and StorageEliminationsConsolidated
 (In thousands)
Operating revenues from external parties$971,636 $41,150 $— $1,012,786 
Intersegment revenues786 121,768 (122,554)— 
Total operating revenues972,422 162,918 (122,554)1,012,786 
Purchased gas cost
496,799 (3,411)(122,225)371,163 
Operation and maintenance expense123,284 36,155 (329)159,110 
Depreciation and amortization expense92,797 35,059 — 127,856 
Taxes, other than income69,045 9,751 — 78,796 
Operating income190,497 85,364 — 275,861 
Other non-operating income1,916 6,786 — 8,702 
Interest charges8,548 11,303 — 19,851 
Income before income taxes
183,865 80,847 — 264,712 
Income tax expense4,294 11,209 — 15,503 
Net income$179,571 $69,638 $— $249,209 
Capital expenditures$437,382 $246,798 $— $684,180 
Balance sheet information at December 31, 2022 and September 30, 2022 by segment is presented in the following tables:
 December 31, 2022
 DistributionPipeline and StorageEliminationsConsolidated
 (In thousands)
Net property, plant and equipment$13,155,891 $4,815,777 $— $17,971,668 
Total assets$22,595,795 $5,113,402 $(4,343,036)$23,366,161 
 September 30, 2022
 DistributionPipeline and StorageEliminationsConsolidated
 (In thousands)
Net property, plant and equipment$12,723,532 $4,516,707 $— $17,240,239 
Total assets$21,424,586 $4,797,206 $(4,028,803)$22,192,989