Business Segment Information (Tables)

6 Months Ended

Mar. 31, 2019

Segment Reporting [Abstract]

Financial Segment Information By Segment

A listing of segment assets at March 31, 2019 and September 30, 2018 is shown in the tables below.  

Quarter Ended March 31, 2019 (Thousands)
	Exploration and Production	Pipeline and Storage	Gathering	Utility	Energy Marketing	Total Reportable Segments	All Other	Corporate and Intersegment Eliminations	Total Consolidated
Revenue from External Customers	$146,102	$48,421	$2	$298,636	$59,018	$552,179	$310	$55	$552,544
Intersegment Revenues	$—	$23,918	$29,366	$4,394	$43	$57,721	$—	$(57,721)	$—
Segment Profit: Net Income (Loss)	$21,873	$17,749	$12,690	$35,589	$544	$88,445	$(128)	$2,278	$90,595

Six Months Ended March 31, 2019 (Thousands)
	Exploration and Production	Pipeline and Storage	Gathering	Utility	Energy Marketing	Total Reportable Segments	All Other	Corporate and Intersegment Eliminations	Total Consolidated
Revenue from External Customers	$308,978	$102,639	$2	$518,647	$111,100	$1,041,366	$1,316	$109	$1,042,791
Intersegment Revenues	$—	$46,769	$59,056	$7,040	$375	$113,240	$—	$(113,240)	$—
Segment Profit: Net Income	$60,087	$42,851	$26,872	$61,237	$243	$191,290	$256	$1,710	$193,256

(Thousands)	Exploration and Production	Pipeline and Storage	Gathering	Utility	Energy Marketing	Total Reportable Segments	All Other	Corporate and Intersegment Eliminations	Total Consolidated
Segment Assets:
At March 31, 2019	$1,777,770	$1,861,900	$554,491	$2,013,937	$53,898	$6,261,996	$78,398	$(61,419)	$6,278,975
At September 30, 2018	$1,568,563	$1,848,180	$533,608	$1,921,971	$50,971	$5,923,293	$78,109	$35,084	$6,036,486

Quarter Ended March 31, 2018 (Thousands)
	Exploration and Production	Pipeline and Storage	Gathering	Utility	Energy Marketing	Total Reportable Segments	All Other	Corporate and Intersegment Eliminations	Total Consolidated
Revenue from External Customers	$146,411	$53,714	$(99)	$283,778	$55,644	$539,448	$1,232	$225	$540,905
Intersegment Revenues	$—	$23,044	$27,832	$5,700	$(51)	$56,525	$—	$(56,525)	$—
Segment Profit: Net Income (Loss)	$26,537	$22,724	$11,770	$33,360	$578	$94,969	$207	$(3,329)	$91,847

Six Months Ended March 31, 2018 (Thousands)
	Exploration and Production	Pipeline and Storage	Gathering	Utility	Energy Marketing	Total Reportable Segments	All Other	Corporate and Intersegment Eliminations	Total Consolidated
Revenue from External Customers	$285,552	$107,025	$71	$470,867	$94,280	$957,795	$2,328	$438	$960,561
Intersegment Revenues	$—	$45,028	$51,497	$7,882	$76	$104,483	$—	$(104,483)	$—
Segment Profit: Net Income (Loss)	$133,235	$61,186	$57,169	$54,353	$1,624	$307,567	$(511)	$(16,555)	$290,501