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Share-Based Compensation and Non-Qualified Deferred Compensation Plan (Tables)
 6 Months Ended
Jun. 30, 2014
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, 2014:
 
 
Options Outstanding and Exercisable (1) (2)
Range of Exercise Prices
Number
 
Weighted
Average Price
$30.06
139,767

 
$
30.06

$41.16-$43.94
119,242

 
42.46

$48.02-$64.75
82,118

 
50.32

Total options
341,127

 
$
39.27

 
(1)
As of June 30, 2014, all options outstanding are also exercisable.
(2)
The aggregate intrinsic value of options outstanding and exercisable at June 30, 2014 was $10.9 million. The aggregate intrinsic values were calculated as the excess, if any, between our closing share price of $71.15 per share on June 30, 2014 and the strike price of the underlying award.
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
The following assumptions were used for the reload options granted during the six months ended June 30, 2014:
 
Six Months Ended
 
June 30, 2014
Weighted average fair value of options granted
$3.55 - $8.17
Expected volatility
22.6% - 23.2%
Risk-free interest rate
0.1% - 1.1%
Expected dividend yield
3.5%
Expected life
6 months - 4 years
Summary Of Share Incentive Plans
The following table summarizes activity under our share incentive plans for the six months ended June 30, 2014:
 
 
Options
Outstanding
 
Weighted
Average
Exercise
Price
 
Nonvested
Share
Awards
Outstanding
 
Weighted
Average
Grant  Price
Total options and nonvested share awards outstanding at December 31, 2013
634,361

 
$
41.59

 
831,298

 
$
59.77

Granted
84,452

 
64.75

 
308,439

 
65.63

Exercised/vested
(356,000
)
 
48.04

 
(290,381
)
 
55.19

Forfeited
(21,686
)
 
62.32

 
(9,629
)
 
63.36

Total options and nonvested share awards outstanding at June 30, 2014
341,127

 
$
39.27

 
839,727

 
$
63.47
Summary of non-qualified deferred compensation share award activity
The following table summarizes the eligible share award activity as recorded in temporary equity for the six months ended June 30, 2014:
(in thousands)
 
 
Balance at December 31, 2013
 
$
47,180

Change in classification
 
2,156

Change in redemption value
 
14,819

Diversification of share awards
 
(2,428
)
Balance at June 30, 2014
 
$
61,727