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Share-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Share-based Compensation, Stock Options, Activity
Option activity under the Company’s incentive stock plans is as follows:

 
 
Number
 of Shares
 
Weighted Avg.
Exercise Price
 Per Share
Outstanding, December 31, 2010 (3,430,038 exercisable at a weighted average price of $10.74 per share and a weighted average remaining contractual life of 4.7 years)
 
7,883,805

 
$
9.65

Granted
 
2,165,056

 
12.14

Exercised
 
(1,246,435
)
 
9.39

Canceled
 
(842,256
)
 
10.64

Outstanding, December 31, 2011 (3,366,610 exercisable at a weighted average price of $10.31 per share and a weighted average remaining contractual life of 4.3 years)
 
7,960,170

 
10.26

Granted
 
1,494,250

 
10.13

Exercised
 
(415,156
)
 
7.91

Canceled
 
(882,995
)
 
11.22

Outstanding, December 31, 2012 (4,068,071 exercisable at a weighted average price of $9.98 per share and a weighted average remaining contractual life of 4.2 years)
 
8,156,269

 
10.25

Granted
 
700,300

 
9.96

Exercised
 
(522,218
)
 
7.62

Canceled
 
(821,263
)
 
10.92

Outstanding, December 31, 2013 (4,286,232 exercisable at a weighted average price of $10.12 per share and a weighted average remaining contractual life of 4.3 years)
 
7,513,088

 
$
10.34
Schedule of Share-based Compensation, Options by Exercise Price Range
Additional information regarding options outstanding as of December 31, 2013 was as follows:
 
 
Stock Options Outstanding
 
Options Exercisable
Range of Exercise Prices
 
Number Outstanding
 
Weighted Avg. Remaining Contractual Life (yrs)
 
Weighted Avg. Exercise Price Per Share
 
Number Exercisable
 
Weighted Avg. Exercise Price Per Share
$ 4.72 to $ 7.00
 
235,987

 
3.4
 
$
6.68

 
234,387

 
$
6.68

$ 7.01 to $ 7.46
 
418,780

 
5.2
 
7.23

 
337,905

 
7.23

$ 7.47 to $ 7.48
 
521,356

 
0.8
 
7.47

 
521,356

 
7.47

$ 7.49 to $ 8.00
 
332,423

 
5.4
 
7.80

 
259,354

 
7.80

$ 8.01 to $ 9.00
 
263,731

 
4.1
 
8.56

 
238,399

 
8.56

$ 9.01 to $10.00
 
1,718,033

 
7.2
 
9.60

 
690,241

 
9.63

$10.01 to $11.00
 
2,073,773

 
7.3
 
10.44

 
755,218

 
10.43

$11.01 to $13.00
 
715,540

 
5.2
 
12.17

 
482,133

 
12.07

$13.01 to $16.00
 
1,026,965

 
6.1
 
13.73

 
560,739

 
13.71

$16.01 to $49.50
 
206,500

 
1.0
 
16.32

 
206,500

 
16.32

 
 
7,513,088

 
5.9
 
$
10.34

 
4,286,232

 
$
10.12
Schedule of Share-based Compensation, Restricted Stock Units Award Activity
Information with respect to outstanding RSU activity is as follows:
 
 
 
Number
 of Shares
 
Weighted
Average
Grant-Date
Fair Value
Outstanding, December 31, 2010
 
145,760

 
$
8.36

Granted
 
589,638

 
10.09

Vested
 
(14,750
)
 
7.72

Forfeited
 
(53,371
)
 
10.44

Outstanding, December 31, 2011
 
667,277

 
9.73

Granted
 
417,531

 
9.67

Vested
 
(146,327
)
 
9.49

Forfeited
 
(61,431
)
 
9.65

Outstanding, December 31, 2012
 
877,050

 
9.83

Granted
 
591,974

 
9.31

Vested
 
(209,819
)
 
9.60

Forfeited
 
(63,943
)
 
9.69

Outstanding, December 31, 2013
 
1,195,262

 
$
9.63
Stock options granted under the Company's option plans, valuation assumptions
The fair value of the stock options granted under the Company’s option plans was estimated at the date of grant using the Black-Scholes option pricing model with the following weighted-average assumptions:
 
Years Ended December 31,
 
2013
 
2012
 
2011
Expected term (years)
5.9

 
5.8

 
5.7

Stock volatility
34.5
%
 
36.6
%
 
40.4
%
Risk free interest rates
1.6
%
 
1.0
%
 
1.7
%
Dividends during expected terms
1.9
%
 
1.6
%
 
1.4
%
Share-based compensation expense, period costs
The following table shows total share-based compensation expense recognized in the Consolidated Statement of Operations for 2013, 2012 and 2011 (in thousands):
 
Years Ended December 31,
 
2013
 
2012
 
2011
Cost of revenues
$
1,060

 
$
1,178

 
$
1,009

Research and development
2,875

 
3,132

 
2,401

Selling, general and administrative
3,162

 
3,282

 
2,444

Pre-tax share-based compensation expense
7,097

 
7,592

 
5,854

Less income tax effect
(2,314
)
 
(2,583
)
 
(2,104
)
Net share-based compensation expense
$
4,783

 
$
5,009

 
$
3,750