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Revenue from Contracts with Customers
 6 Months Ended
Mar. 31, 2025
Revenue from Contract with Customer [Abstract]  
Revenue from Contracts with Customers Revenue from Contracts with Customers
 
    The following tables provide a disaggregation of the Company's revenues for the quarter and six months ended March 31, 2025 and 2024, presented by type of service from each reportable segment.
Quarter Ended March 31, 2025 (Thousands)   
Revenues By Type of ServiceExploration and ProductionPipeline and StorageGatheringUtilityAll OtherCorporate and Intersegment EliminationsTotal Consolidated
Production of Natural Gas$318,404 $— $— $— $— $— $318,404 
Production of Crude Oil393 — — — — — 393 
Natural Gas Processing338 — — — — — 338 
Natural Gas Gathering Service— — 65,030 — — (61,797)3,233 
Natural Gas Transportation Service— 82,481 — 45,256 — (27,538)100,199 
Natural Gas Storage Service— 25,288 — — — (10,691)14,597 
Natural Gas Residential Sales— — — 257,100 — — 257,100 
Natural Gas Commercial Sales— — — 39,602 — — 39,602 
Natural Gas Industrial Sales— — — 1,937 — (2)1,935 
Other657 1,804 — (3,228)— (276)(1,043)
Total Revenues from Contracts with Customers319,792 109,573 65,030 340,667 — (100,304)734,758 
Alternative Revenue Programs— — — 3,026 — — 3,026 
Derivative Financial Instruments(7,834)— — — — — (7,834)
Total Revenues$311,958 $109,573 $65,030 $343,693 $— $(100,304)$729,950 
Six Months Ended March 31, 2025 (Thousands)   
Revenues By Type of ServiceExploration and ProductionPipeline and StorageGatheringUtilityAll OtherCorporate and Intersegment EliminationsTotal Consolidated
Production of Natural Gas$535,863 $— $— $— $— $— $535,863 
Production of Crude Oil907 — — — — — 907 
Natural Gas Processing613 — — — — — 613 
Natural Gas Gathering Service— — 126,161 — — (119,480)6,681 
Natural Gas Transportation Service— 163,686 — 72,176 — (54,719)181,143 
Natural Gas Storage Service— 50,281 — — — (21,195)29,086 
Natural Gas Residential Sales— — — 413,450 — — 413,450 
Natural Gas Commercial Sales— — — 61,845 — — 61,845 
Natural Gas Industrial Sales— — — 3,275 — (3)3,272 
Other1,541 2,219 — 12,512 — (537)15,735 
Total Revenues from Contracts with Customers538,924 216,186 126,161 563,258 — (195,934)1,248,595 
Alternative Revenue Programs— — — 8,943 — — 8,943 
Derivative Financial Instruments21,894 — — — — — 21,894 
Total Revenues$560,818 $216,186 $126,161 $572,201 $— $(195,934)$1,279,432 
Quarter Ended March 31, 2024 (Thousands)   
Revenues By Type of ServiceExploration and ProductionPipeline and StorageGatheringUtilityAll OtherCorporate and Intersegment EliminationsTotal Consolidated
Production of Natural Gas$203,198 $— $— $— $— $— $203,198 
Production of Crude Oil524 — — — — — 524 
Natural Gas Processing303 — — — — — 303 
Natural Gas Gathering Service— — 63,993 — — (60,076)3,917 
Natural Gas Transportation Service— 81,273 — 37,841 — (25,852)93,262 
Natural Gas Storage Service— 25,343 — — — (11,024)14,319 
Natural Gas Residential Sales— — — 210,392 — — 210,392 
Natural Gas Commercial Sales— — — 30,815 — — 30,815 
Natural Gas Industrial Sales— — — 1,281 — (2)1,279 
Other405 1,404 — (881)— (238)690 
Total Revenues from Contracts with Customers204,430 108,020 63,993 279,448 — (97,192)558,699 
Alternative Revenue Programs— — — 11,056 — — 11,056 
Derivative Financial Instruments60,184 — — — — — 60,184 
Total Revenues$264,614 $108,020 $63,993 $290,504 $— $(97,192)$629,939 
Six Months Ended March 31, 2024 (Thousands)   
Revenues By Type of ServiceExploration and ProductionPipeline and StorageGatheringUtilityAll OtherCorporate and Intersegment EliminationsTotal Consolidated
Production of Natural Gas$435,859 $— $— $— $— $— $435,859 
Production of Crude Oil1,211 — — — — — 1,211 
Natural Gas Processing570 — — — — — 570 
Natural Gas Gathering Service— — 126,581 — — (118,068)8,513 
Natural Gas Transportation Service— 152,891 — 67,126 — (46,214)173,803 
Natural Gas Storage Service— 46,635 — — — (20,084)26,551 
Natural Gas Residential Sales— — — 356,938 — — 356,938 
Natural Gas Commercial Sales— — — 51,096 — — 51,096 
Natural Gas Industrial Sales— — — 2,188 — (3)2,185 
Other1,054 2,907 — (1,448)— (489)2,024 
Total Revenues from Contracts with Customers438,694 202,433 126,581 475,900 — (184,858)1,058,750 
Alternative Revenue Programs— — — 16,612 — — 16,612 
Derivative Financial Instruments79,939 — — — — — 79,939 
Total Revenues$518,633 $202,433 $126,581 $492,512 $— $(184,858)$1,155,301 
    The Company records revenue related to its derivative financial instruments in the Exploration and Production segment. The Company also records revenue related to alternative revenue programs in its Utility segment. Revenue related to derivative financial instruments and alternative revenue programs are excluded from the scope of the authoritative guidance regarding revenue recognition since they are accounted for under other existing accounting guidance.

    The Company’s Pipeline and Storage segment expects to recognize the following revenue amounts in future periods related to “fixed” charges associated with remaining performance obligations for transportation and storage contracts: $117.3 million for the remainder of fiscal 2025; $220.7 million for fiscal 2026; $203.3 million for fiscal 2027; $151.5 million for fiscal 2028; $122.3 million for fiscal 2029; and $649.1 million thereafter.