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Inventories (Tables)
12 Months Ended
Sep. 30, 2013
Inventory Disclosure [Abstract]  
Inventories
Inventories comprise the following at September 30:
 
2013
 
2012
Gas Utility natural gas
$
78,950

 
$
57,663

Materials, supplies and other
10,711

 
9,671

Total inventories
$
89,661

 
$
67,334