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Stock Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity
The following table summarizes transactions for our RSUs, excluding dividend equivalents, for 2014: 
Restricted Stock Units
Number of
RSUs
 
Weighted
Average
Grant Date
Fair Value
RSUs at December 31, 2013
2,344,681

 
$13.71
Granted
778,412

 
$16.15
Vested
(882,096
)
 
$12.53
Forfeited
(90,988
)
 
$14.81
RSUs at December 31, 2014
2,150,009

 
$15.03