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Stock-Based Compensation (Tables)
 6 Months Ended
Jun. 30, 2014
Share-based Compensation [Abstract]  
Summary Of Restricted Stock Activity

A summary of restricted stock and restricted stock unit activity and changes during the six months ended June 30, 2014 is presented below:
Restricted Stock and Restricted Stock Units
 
Grants
 
Weighted Average Grant Date Fair Value
 
Aggregate Intrinsic Value ($000)
 
 
 
 
 
 
 
Outstanding at January 1, 2014 (non-vested)
 
737,562

 
$
39.54

 
 
Granted
 
70,243

 
48.22

 
 
Vesting (transfer/conversion to common stock)
 
(103,586
)
 
33.71

 
 
Forfeited
 
(72,697
)
 
42.24

 
 
Outstanding at June 30, 2014 (non-vested)
 
631,522

 
$
41.15

 
$
27,591
Summary Of Performance Share Unit Activity
A summary of performance share unit activity and changes during the six months ended June 30, 2014 is presented below:
Performance Share Units
 
Grants
 
 
 
Outstanding at January 1, 2014 (non-vested)
 
983,610

Granted
 
26,493

Vesting and transfer of ownership to recipients
 
(181,290
)
Forfeited
 
(108,182
)
Outstanding at June 30, 2014 (non-vested)
 
720,631