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Information On Oil And Natural Gas Producing Activities (Tables)
 12 Months Ended
Sep. 30, 2014
Information On Oil And Natural Gas Producing Activities [Abstract]  
Summary Of Sales Through Various Operators Or Purchasers

 

 

 

 

 

 

 

 

 

 

 

 

 

2014

 

2013

 

2012

 

 

 

 

 

 

Southwestern Energy Company
17% 

 
20% 

 
15% 

Chesapeake Operating, Inc.
11% 

 
10% 

 
13% 

Apache Corporation
9% 

 
6% 

 
4% 

Cheyenne Petroleum
6% 

 

 -

 

 -

Devon Energy Corp.
5% 

 
7% 

 
10%