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RELINQUISHMENT AGREEMENT (Tables)
9 Months Ended
Jun. 30, 2012
RELINQUISHMENT AGREEMENT [Abstract]  
Relinquishment payments
Relinquishment payments consisted of the following (in millions):
 
For the Nine Months Ended
 
June 30, 2012
 
June 30, 2011
Principal
$
28.8

 
$
26.3

Accretion of discount
5.9

 
8.1

Total
$
34.7

 
$
34.4