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Common Stock, Options and Stock Compensation (Tables)
 6 Months Ended
Mar. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Compensation costs included in net income
Our net income includes the following compensation costs related to our stock compensation arrangements:
 
 
Three Months Ended March 31,
 
Six Months Ended March 31,
 
2013
 
2012
 
2013
 
2012
 
(in thousands)
Gross compensation costs
$
2,129

 
$
1,725

 
$
3,054

 
$
3,238

Income tax benefits
(720
)
 
(570
)
 
(1,019
)
 
(1,016
)
Net compensation expense
$
1,409

 
$
1,155

 
$
2,035

 
$
2,222