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Stock-Based Compensation (Tables)
 12 Months Ended
Sep. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Aggregate option activity
The following is a summary of activity related to performance shares:
 
2015
 
2014
 
2013
 
Number of
Shares
 
Weighted Average
Fair Value at Date
of Grant
 
Number of
Shares
 
Weighted Average
Fair Value at Date
of Grant
 
Number of
Shares
 
Weighted Average
Fair Value at Date
of Grant
Outstanding at beginning of year
174

 
$
24.86

 
154

 
$
17.85

 
158

 
$
18.30

Restricted shares awarded
25

 
29.88

 
26

 
25.34

 
12

 
15.50

Restricted shares earned
(33
)
 
24.68

 
(25
)
 
18.94

 
(5
)
 
22.00

Performance shares awarded
56

 
28.61

 
112

 
26.50

 
60

 
15.98

Performance shares earned
(11
)
 
20.75

 
(21
)
 
16.42

 
(33
)
 
16.05

Awards forfeited
(113
)
 
25.16

 
(72
)
 
17.12

 
(38
)
 
17.00

Outstanding at end of year
98

 
$
28.50

 
174

 
$
24.86

 
154

 
$
17.85