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Share-Based Compensation (Tables)
 6 Months Ended
Jun. 30, 2013
Share-based Compensation [Abstract]  
Schedule Of Share Based Compensation Shares Authorized Under Stock Option Plans By Exercise Price Range And Intrinsic Value
The following table summarizes outstanding share options and exercisable options at June 30, 2013:
 
 
Outstanding Options (1)
 
Exercisable Options (1)
Range of Exercise Prices
Number
 
Weighted
Average Price
 
Number
 
Weighted
Average Price
$30.06-$41.16
228,012

 
$
33.14

 
130,107

 
$
35.46

$42.90-$43.94
108,947

 
43.43

 
108,947

 
43.43

$45.53-$62.32
298,609

 
47.39

 
298,609

 
47.39

Total options
635,568

 
$
41.60

 
537,663

 
$
43.70

 
(1)
The aggregate intrinsic value of outstanding and exercisable options at June 30, 2013 was $17.5 million and $13.7 million, respectively. The aggregate intrinsic values were calculated as the excess, if any, between our closing share price of $69.14 per share on June 30, 2013 and the strike price of the underlying award.
Summary Of Share Incentive Plans
The following table summarizes activity under our share incentive plans for the six months ended June 30, 2013:
 
 
Options
Outstanding
 
Weighted
Average
Exercise
Price
 
Nonvested
Share
Awards
Outstanding
 
Weighted
Average
Grant  Price
Total options and nonvested share awards outstanding at December 31, 2012
838,754

 
$
42.36

 
862,253

 
$
52.64

Granted
—

 
—

 
347,715

 
69.61

Exercised/vested
(182,664
)
 
41.52

 
(292,128
)
 
50.22

Forfeited
(20,522
)
 
73.32

 
(18,836
)
 
61.69

Net activity
(203,186
)
 
 
 
36,751

 
 
Total options and nonvested share awards outstanding at June 30, 2013
635,568

 
$
41.60

 
899,004

 
$
59.80