Business Segment Information (Tables)

6 Months Ended

Mar. 31, 2015

Segment Reporting [Abstract]

Financial Segment Information By Segment

Quarter Ended March 31, 2015 (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	$165,521	$55,758	$89	$309,974	$64,167	$595,509	$388	$230	$596,127
Intersegment Revenues	$—	$23,054	$17,365	$6,521	$211	$47,151	$—	$(47,151)	$—
Segment Profit: Net Income (Loss)	$(53,562)	$23,377	$6,405	$38,238	$3,373	$17,831	$98	$(1,260)	$16,669

Six Months Ended March 31, 2015 (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	$370,186	$107,504	$235	$520,047	$120,333	$1,118,305	$1,271	$460	$1,120,036
Intersegment Revenues	$—	$44,515	$41,793	$11,055	$417	$97,780	$—	$(97,780)	$—
Segment Profit: Net Income (Loss)	$(26,842)	$44,155	$18,028	$60,831	$6,199	$102,371	$93	$(1,055)	$101,409

(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, 2015	$3,289,590	$1,446,247	$379,707	$2,022,373	$103,806	$7,241,723	$76,810	$(90,587)	$7,227,946
At September 30, 2014	$3,100,514	$1,367,181	$326,662	$1,862,850	$76,238	$6,733,445	$86,460	$(80,308)	$6,739,597

Quarter Ended March 31, 2014 (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	$199,561	$53,571	$195	$377,647	$124,439	$755,413	$597	$232	$756,242
Intersegment Revenues	$—	$22,235	$15,452	$8,204	$5	$45,896	$—	$(45,896)	$—
Segment Profit: Net Income	$24,390	$21,372	$7,324	$35,545	$3,765	$92,396	$278	$2,537	$95,211

Six Months Ended March 31, 2014 (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	$392,607	$104,784	$429	$608,100	$197,598	$1,303,518	$2,298	$498	$1,306,314
Intersegment Revenues	$—	$42,974	$29,802	$12,911	$260	$85,947	$—	$(85,947)	$—
Segment Profit: Net Income	$55,487	$40,510	$13,471	$59,760	$5,369	$174,597	$954	$1,912	$177,463