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Common Stock, Options and Stock Compensation (Tables)
 6 Months Ended
Mar. 31, 2014
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,
 
2014
 
2013
 
2014
 
2013
 
(in thousands)
Gross compensation costs
$
7,040

 
$
2,129

 
$
8,276

 
$
3,054

Income tax benefits
(2,444
)
 
(720
)
 
(2,869
)
 
(1,019
)
Net compensation expense
$
4,596

 
$
1,409

 
$
5,407

 
$
2,035