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Stock-Based Compensation (Tables)
 9 Months Ended
Sep. 30, 2012
Share-based Compensation [Abstract]  
Summary Of Restricted Stock Activity

A summary of restricted stock activity and changes during the nine months ended September 30, 2012 is presented below:
Restricted Stock
 
Grants
 
Weighted Average Grant Date Fair Value
 
Aggregate Intrinsic Value ($000)
 
 
 
 
 
 
 
Outstanding at January 1, 2012 (non-vested)
 
1,122,350

 
$
25.48

 
 
Granted
 
420,922

 
33.97

 
 
Vesting and transfer of ownership to recipients
 
(574,408
)
 
23.48

 
 
Forfeited
 
(3,975
)
 
33.06

 
 
Outstanding at September 30, 2012 (non-vested)
 
964,889

 
$
30.35

 
$
39,821
Summary Of Performance Share Unit Activity
A summary of performance share unit activity and changes during the nine months ended September 30, 2012 is presented below:
Performance Share Units
 
Grants
 
 
 
Outstanding at January 1, 2012 (non-vested)
 
774,788

Granted
 
298,559

Vesting and transfer of ownership to recipients
 
(240,019
)
Forfeited
 
(5,057
)
Outstanding at September 30, 2012 (non-vested)
 
828,271