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Equity (Tables)
9 Months Ended
Sep. 30, 2011
Equity 
Schedule of equity-based compensation expense

 

 

 

Three months ended

 

Nine months ended

 

 

 

September 30,

 

September 30,

 

 

 

2011

 

2010

 

2011

 

2010

 

Equity-based compensation expense

 

$

2,951

 

$

2,356

 

$

9,472

 

$

6,222

 

Summary of restricted stock awards and restricted stock unit activity

 

 

 

Shares
(000’s)

 

Weighted-
Average
Grant-Date
Fair Value

 

Nonvested at December 31, 2010

 

616

 

$

19.06

 

Granted

 

279

 

51.11

 

Vested

 

(173

)

14.33

 

Forfeited (including cancelled awards)

 

(87

)

26.83

 

Nonvested at September 30, 2011

 

635

 

$

33.36

 

Summary of stock option awards activity

 

 

 

Shares (000s)

 

Weighted-
Average
Exercise
Price

 

Aggregate
Intrinsic
Value (000s)

 

Weighted-
Average
Remaining
Contractual Life
(in years)

 

Outstanding at December 31, 2010

 

2,569

 

$

19.71

 

 

 

 

 

Granted

 

368

 

50.65

 

 

 

 

 

Exercised

 

(638

)

15.63

 

 

 

 

 

Forfeited (including cancelled options)

 

(141

)

29.17

 

 

 

 

 

Outstanding at September 30, 2011

 

2,158

 

$

25.56

 

$

19,273

 

6.1

 

Options exercisable at September 30, 2011

 

1,006

 

$

17.92

 

$

12,482

 

4.6