v2.4.0.6
Share-based Payments (Tables)
 12 Months Ended
Dec. 31, 2011
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions
The Company utilized the following weighted-average assumptions in estimating the fair value of the option grants in the years ended December 31, 2011, 2010 and 2009:
 
 
2011
 
2010
 
2009
Expected dividends
 
—
%
 
—
%
 
—
%
Expected volatility
 
49.88
%
 
54.74
%
 
50.01
%
Risk-free interest rate
 
2.06
%
 
2.24
%
 
1.99
%
Expected lives in years
 
5.00

 
5.00

 
5.00

Weighted-average fair value of options:
 
 
 
 
 
 
Granted at fair value
 
$
6.49

 
$
3.23

 
$
6.43

Weighted-average exercise price of options:
 
 
 
 
 
 
Granted at fair value
 
$
14.37

 
$
6.62

 
$
14.23
Schedule of Share-based Compensation, Stock Options, Activity
A summary of the status of stock options granted under the Company's Equity Plans as of December 31, 2011, and changes during the period then ended, is presented in the table below:
 
 
2011
 
 
Shares
 
Weighted Average Exercise Price
Outstanding, beginning of year
 
31,642,532

 
$
13.52

Granted
 
4,186,204

 
$
14.37

Exercised
 
(6,370,790
)
 
$
9.27

Forfeited
 
(712,384
)
 
$
15.21

Outstanding, end of year
 
28,745,562

 
$
14.54

Options vested or expected to vest at year-end
 
28,260,376

 
$
14.58

Options exercisable at year-end
 
21,385,013

 
$
15.25
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity
The following table summarizes information about restricted stock award activity:
 
 
2011
Restricted Stock Awards
 
Shares
 
Weighted Average Grant-Date Fair Value
Unvested balance, beginning of year
 
2,665,110

 
$
8.73

Grants
 
1,771,639

 
$
14.35

Vested shares
 
(1,136,002
)
 
$
8.74

Forfeitures
 
(153,361
)
 
$
11.52

Unvested balance, end of year
 
3,147,386

 
$
11.75