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Share-Based Compensation (Tables)
 3 Months Ended
Dec. 31, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Summary of Stock Option Activity
A summary of stock option activity during the three months ended December 31, 2012 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
0
 
$
—

 
 
 
 
Exercised
(38)
 
$
16.25

 
 
 
$
1,181

Forfeited
(16)
 
$
38.96

 
 
 
 
Outstanding at December 31, 2012
1,396
 
$
29.98

 
5.9
 
$
22,058

Exercisable at December 31, 2012
1,023
 
$
26.44

 
5.0
 
$
19,785
Schedule of Restricted Stock Activity
A summary of restricted stock activity for the three months ended December 31, 2012 is as follows:
 
 
Number of Shares (000s)
 
Wtd. Avg. Fair Value
Unvested at October 1, 2012
701
 
$
38.54

Granted
323
 
$
46.46

Vested
(142)
 
$
34.77

Forfeited
(9)
 
$
39.62

Unvested at December 31, 2012
873
 
$
42.06