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STOCK-BASED COMPENSATION (Tables)
 12 Months Ended
Dec. 31, 2011
STOCK-BASED COMPENSATION  
Schedule of weighted-average assumptions used to estimate the fair value of options granted

 

 

 

 

2011

 

2010

 

2009

 

Dividend yield

 

0.0 %

 

0.0 %

 

0.0 %

 

Expected volatility

 

53.6 %

 

58.2 %

 

62.8 %

 

Risk free interest rate

 

1.5 %

 

1.9 %

 

2.5 %

 

Expected term

 

5.8 Years

 

5.9 Years

 

6.4 Years

 
Summary of activities with respect to its stock option plans

 

 

Options

 

Number of
Shares (In
Thousands)

 

Weighted-
Average
Exercise
Price Per
Share

 

Weighted-
Average
Remaining
Contractual
Term (In
Years)

 

Aggregate
Intrinsic
Value

Balance at January 1, 2011

 

19,498

 

$

8.59

 

5.2

 

$

342,241

Granted 01/01/11 - 03/31/11

 

118

 

$

28.81

 

 

 

 

Granted 04/01/11 - 06/30/11

 

103

 

$

35.00

 

 

 

 

Granted 07/01/11 - 09/30/11

 

110

 

$

40.45

 

 

 

 

Granted 10/01/11 - 12/31/11

 

95

 

$

44.81

 

 

 

 

Exercised

 

(1,178)

 

$

17.26

 

 

 

 

Cancelled or forfeited

 

(177)

 

$

21.25

 

 

 

 

Outstanding at December 31, 2011

 

18,569

 

$

8.57

 

4.1

 

$

696,371

Vested and expected to vest in the future at December 31, 2011

 

17,947

 

$

8.12

 

4.0

 

$

 681,183

Exercisable at December 31, 2011

 

14,366

 

$

5.17

 

3.1

 

$

587,578
Summary of stock options outstanding and exercisable

 

 

 

 

 

 

Options Outstanding

 

Options Exercisable

Range of Exercise
Prices ($)

 

Number
Outstanding (In
Thousands)

 

Weighted
Average
Remaining
Contractual
Term (Years)

 

Weighted
Average
Exercise
Price ($)

 

Number
Exercisable
(In
Thousands)

 

Weighted
Average
Exercise
Price ($)

$0.22

-

$0.22

 

1,793

 

0.5

 

$0.23

 

1,793

 

$0.22

$0.27

-

$0.27

 

3,441

 

1.4

 

$0.27

 

3,441

 

$0.27

$2.09

-

$2.09

 

68

 

3.0

 

$2.09

 

68

 

$2.09

$3.29

-

$3.29

 

4,400

 

3.2

 

$3.29

 

4,400

 

$3.29

$5.64

-

$6.21

 

57

 

3.8

 

$6.13

 

57

 

$6.13

$8.44

-

$8.44

 

2,458

 

3.9

 

$8.44

 

2,458

 

$8.44

$11.36

-

$15.60

 

266

 

6.8

 

$13.49

 

119

 

$13.42

$15.86

-

$15.86

 

2,163

 

6.4

 

$15.86

 

1,066

 

$15.86

$15.94

-

$18.07

 

2,024

 

7.8

 

$17.76

 

606

 

$17.78

$18.64

-

$46.04

 

1,899

 

7.9

 

$25.39

 

358

 

$22.24

 

 

 

 

18,569

 

4.1

 

$8.57

 

14,366

 

$5.17
Summary of activities with respect to non-vested restricted stock awards and non-vested restricted stock units

 

 

 

 

Number of
Shares (in
thousands)

 

 

Weighted Average Grant-Date Fair Value

Non-vested at January 1, 2011

 

12 

 

 

$

19.20

Granted 01/01/11 - 03/31/11

 

- 

 

 

$

-   

Granted 04/01/11 - 06/30/11

 

56 

 

 

$

35.88

Granted 07/01/11 - 09/30/11

 

656 

 

 

$

42.04

Granted 10/01/11 - 12/31/11

 

18 

 

 

$

45.07

Vested

 

(16)

 

 

$

23.51

Forfeited/cancelled

 

(2)

 

 

$

42.04

Non-vested at December 31, 2011

 

724 

 

 

$

41.66
Schedule of total compensation cost charged against income

 

 

 

 

2011

 

2010

 

2009

Operating expenses

 

 $

19,423

 

 $

16,862

 

 $

14,041

Total employee and non-employee share-based compensation expense included in income, before income tax

 

19,424

 

16,862

 

14,040

Less: Amount of income tax benefit recognized in earnings

 

(6,646)

 

(4,234)

 

(4,358)

Amount charged against net income

 

 $

12,778

 

 $

12,628

 

 $

9,682