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Share-Based Compensation Level 3 (Tables)
 3 Months Ended
Mar. 31, 2013
Share-based Compensation [Abstract]  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
The fair values of our stock options are calculated using the following weighted average assumptions for the three months ended March 31, 2013:
 
 
Three Months Ended
Assumptions
 
March 31, 2013
Dividend yield
 
1.9
%
Expected volatility
 
35.2
%
Risk-free interest rate
 
0.7
%
Expected holding period (in years)
 
4.0
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]
The following table sets forth stock option activity for the three months ended March 31, 2013:
 
Options
 
Weighted-Average
Exercise Price
Outstanding at December 31, 2012
12,401,970

 
$
8.84

Granted
2,041,330

 
$
15.26

Exercised
(349,663
)
 
$
8.85

Cancelled
(36,397
)
 
$
10.31

Outstanding at March 31, 2013
14,057,240

 
$
9.77

Exercisable at March 31, 2013
9,939,390

 
$
8.51
Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block]
Restricted share activity for the three months ended March 31, 2013 was as follows:
 
Restricted
shares
 
Weighted-Average
Grant-Date
Fair Value
Nonvested restricted shares at December 31, 2012
1,104,579

 
$
9.78

Granted
378,280

 
$
15.26

Vested
(296,886
)
 
$
8.63

Cancelled
(2,744
)
 
$
10.32

Nonvested restricted shares at March 31, 2013
1,183,229

 
$
11.81