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OTHER INCOME AND (INCOME DEDUCTIONS) - NET (Tables)
 9 Months Ended
Jun. 30, 2012
OTHER INCOME AND (INCOME DEDUCTIONS) - NET [Abstract]  
Other Income and (Income Deductions) by Component
   
Three Months Ended
 
Nine Months Ended
 
     
June 30,
 
June 30,
 
 
(Thousands)
 
2012
 
2011
 
2012
 
2011
 
                             
 
Interest income
 
$
293
 
$
168
 
$
934
 
$
831
 
 
Net investment (loss) gain
   
(265
)
 
73
   
1,949
   
1,240
 
 
Other income
   
(14
)
 
(21
)
 
(3
)
 
53
 
 
Other income deductions
   
(135
)
 
(393
)
 
316
   
3
 
 
Other Income and (Income Deductions) – Net
 
$
(121
)
$
(173
)
$
3,196
 
$
2,127