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Earnings Per Common Share (Tables)
 6 Months Ended
Mar. 31, 2013
Earnings Per Common Share [Abstract]  
Computation of Basic and Diluted Earnings Per Share
The computation of basic and diluted earnings per share for the three and six months ended March 31, 2013 and 2012 is as follows:
 
 
Three Months Ended
 
Six Months Ended
(In thousands, except per share amounts)
Net
Income
 
Shares
 
Per Share
Amount
 
Net Income
 
Shares
 
Per Share
Amount
March 31, 2013
 
 
 
 
 
 
 
 
 
 
 
Basic earnings per share
$
85,519

 
65,733
 
$
1.30

 
$
158,350

 
65,631
 
$
2.41

Effect of dilutive securities:
 
 
 
 
 
 
 
 
 
 
 
Stock options
—

 
388
 
$
(0.01
)
 
—

 
399
 
$
(0.01
)
Restricted stock
—

 
468
 
$
(0.01
)
 
—

 
311
 
$
(0.01
)
Diluted earnings per share
$
85,519

 
66,589
 
$
1.28

 
$
158,350

 
66,341
 
$
2.39

March 31, 2012
 
 
 
 
 
 
 
 
 
 
 
Basic earnings per share
$
59,466

 
65,276
 
$
0.91

 
$
124,934

 
65,150
 
$
1.92

Effect of dilutive securities:
 
 
 
 
 
 
 
 
 
 
 
Stock options
—

 
305
 
$
(0.01
)
 
—

 
326
 
$
(0.01
)
Restricted stock
—

 
200
 
$
—

 
—

 
184
 
$
(0.01
)
Diluted earnings per share
$
59,466

 
65,781
 
$
0.90

 
$
124,934

 
65,660
 
$
1.90