Business Segment Information (Tables)

6 Months Ended

Mar. 31, 2022

Segment Reporting [Abstract]

Financial Segment Information By Segment

Quarter Ended March 31, 2022 (Thousands)
	Exploration and Production	Pipeline and Storage	Gathering	Utility	Total Reportable Segments	All Other	Corporate and Intersegment Eliminations	Total Consolidated
Revenue from External Customers	$261,593	$67,795	$3,157	$369,092	$701,637	$—	$83	$701,720
Intersegment Revenues	$—	$27,602	$49,447	$110	$77,159	$—	$(77,159)	$—
Segment Profit: Net Income (Loss)	$71,121	$25,470	$22,092	$53,048	$171,731	$—	$(4,403)	$167,328

Six Months Ended March 31, 2022 (Thousands)
	Exploration and Production	Pipeline and Storage	Gathering	Utility	Total Reportable Segments	All Other	Corporate and Intersegment Eliminations	Total Consolidated
Revenue from External Customers	$505,791	$129,342	$7,202	$605,776	$1,248,111	$—	$166	$1,248,277
Intersegment Revenues	$—	$54,405	$97,627	$184	$152,216	$6	$(152,222)	$—
Segment Profit: Net Income (Loss)	$133,490	$50,637	$45,229	$75,178	$304,534	$(7)	$(4,807)	$299,720

(Thousands)	Exploration and Production	Pipeline and Storage	Gathering	Utility	Total Reportable Segments	All Other	Corporate and Intersegment Eliminations	Total Consolidated
Segment Assets:
At March 31, 2022	$2,535,426	$2,330,802	$845,379	$2,247,733	$7,959,340	$235	$(154,552)	$7,805,023
At September 30, 2021	$2,286,058	$2,296,030	$837,729	$2,148,267	$7,568,084	$4,146	$(107,405)	$7,464,825

Quarter Ended March 31, 2021 (Thousands)
	Exploration and Production	Pipeline and Storage	Gathering	Utility	Total Reportable Segments	All Other	Corporate and Intersegment Eliminations	Total Consolidated
Revenue from External Customers	$220,187	$59,314	$671	$270,784	$550,956	$64	$95	$551,115
Intersegment Revenues	$—	$27,390	$49,591	$97	$77,078	$1	$(77,079)	$—
Segment Profit: Net Income (Loss)	$36,822	$24,928	$20,700	$32,044	$114,494	$(983)	$(1,075)	$112,436

Six Months Ended March 31, 2021 (Thousands)
	Exploration and Production	Pipeline and Storage	Gathering	Utility	Total Reportable Segments	All Other	Corporate and Intersegment Eliminations	Total Consolidated
Revenue from External Customers	$411,582	$118,623	$1,021	$459,684	$990,910	$1,175	$190	$992,275
Intersegment Revenues	$—	$55,846	$96,249	$197	$152,292	$20	$(152,312)	$—
Segment Profit: Net Income	$7,199	$49,112	$41,250	$55,081	$152,642	$36,577	$991	$190,210