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Share-Based Compensation (Tables)
 6 Months Ended
Jun. 30, 2014
Share-based Compensation [Abstract]  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions
The fair values of our stock options are calculated using the following weighted average assumptions for the six months ended June 30, 2014:
 
 
Six Months Ended
Assumptions
 
June 30, 2014
Dividend yield
 
1.8
%
Expected volatility
 
27.1
%
Risk-free interest rate
 
1.1
%
Expected holding period (in years)
 
4.0
Schedule of Share-based Compensation, Stock Options, Activity
The following table sets forth stock option activity for the six months ended June 30, 2014:
 
Options
 
Weighted-Average
Exercise Price
Outstanding at December 31, 2013
13,319,750

 
$
9.84

Granted
2,495,850

 
$
17.41

Exercised
(1,731,275
)
 
$
9.67

Canceled
(26,034
)
 
$
15.77

Outstanding at June 30, 2014
14,058,291

 
$
11.19

Exercisable at June 30, 2014
9,598,541

 
$
9.03
Schedule of Share-based Compensation, Restricted Stock Units Award Activity
Restricted share activity for the six months ended June 30, 2014 was as follows:
 
Restricted
shares
 
Weighted-Average
Grant-Date
Fair Value
Nonvested restricted shares at December 31, 2013
1,183,229

 
$
11.81

Granted
344,570

 
$
17.41

Vested
(187,549
)
 
$
11.44

Nonvested restricted shares at June 30, 2014
1,340,250

 
$
13.30