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Stock-Based Compensation (Tables)
 3 Months Ended
Mar. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Stock options outstanding under equity-based compensation plans
Stock Options
 
A summary of the changes in stock options outstanding during the three months ended March 31, 2013 is presented below:


Number of
Options

Weighted
Average
Remaining
Contract Term
(Years)

Weighted Average Exercise Price

Aggregate Intrinsic Value
Options outstanding as of December 31, 2012

3,461


7.8

$
9.34


$
659

Granted

—




—


—

Exercised

—




—


—

Canceled

—




—


—

Options outstanding as of March 31, 2013

3,461


7.6

$
9.34


$
744

Options exercisable as of March 31, 2013

1,304


7.3

$
10.25


$
79
RSUs outstanding under equity-based compensation plans
Restricted Stock Units
 
A summary of the changes in RSUs outstanding during the three months ended March 31, 2013 is presented below:
 
 
Number of
RSUs
 
Weighted Average Grant Date Fair Value Per RSU
Unvested units as of December 31, 2012
 
4,815

 
$
10.53

Granted
 
1,354

 
8.86

Vested
 
(918
)
 
12.36

Canceled
 
(3
)
 
10.76

Unvested units as of March 31, 2013
 
5,248

 
$
10.05