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Share-Based Compensation (Tables)
 6 Months Ended
Mar. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Summary of Stock Option Activity
A summary of stock option activity during the six months ended March 31, 2013 is as follows:
 
 
Number of Options (000s)
 
Wtd. Avg. Exercise Price
 
Wtd. Avg. Remaining Contractual Life (Years)
 
Aggregate Intrinsic Value (000s)
Outstanding at October 1, 2012
1,450

 
$
29.74

 
6.1
 
$
22,663

Granted
—

 
$
—

 
 
 
 
Exercised
(188)

 
$
19.17

 
 
 
$
6,076

Forfeited
(17)

 
$
39.26

 
 
 
 
Outstanding at March 31, 2013
1,245

 
$
31.16

 
6.0
 
$
26,609

Exercisable at March 31, 2013
875

 
$
27.56

 
5.0
 
$
21,860
Schedule of Restricted Stock Activity
A summary of restricted stock activity for the six months ended March 31, 2013 is as follows:
 
 
Number of Shares (000s)
 
Wtd. Avg. Fair Value
Unvested at October 1, 2012
701
 
$
38.54

Granted
346
 
$
46.67

Vested
(145)
 
$
34.84

Forfeited
(22)
 
$
41.80

Unvested at March 31, 2013
880
 
$
42.27