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Stock-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2013
Share-based Compensation [Abstract]  
Summary Of Restricted Stock Activity
A summary of restricted stock and restricted stock unit activity and changes during the year ended December 31, 2013 is presented below:
Restricted Stock and Restricted Stock Units
 
Grants
 
Weighted Average Grant Date Fair Value
 
Aggregate Intrinsic Value ($000)
 
 
 
 
 
 
 
Outstanding at January 1, 2013 (non-vested)
 
843,527

 
$
34.52

 
 
Granted
 
401,394

 
42.00

 
 
Vesting (transfer / conversion to common stock)
 
(491,565
)
 
33.04

 
 
Forfeited
 
(15,794
)
 
35.86

 
 
Outstanding at December 31, 2013 (non-vested)
 
737,562

 
$
39.54

 
$
36,650
Summary Of Performance Share Unit Activity
A summary of performance share unit activity and changes during the year ended December 31, 2013 is presented below:
Performance Share Units
 
Grants
 
 
 
Outstanding at January 1, 2013 (non-vested)
 
875,574

Granted
 
256,671

Vesting and transfer of ownership to recipients
 
(126,460
)
Forfeited
 
(22,175
)
Outstanding at December 31, 2013 (non-vested)
 
983,610