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Stock Plan (Tables)
12 Months Ended
Dec. 31, 2017
Stock Plans  
Schedule of share-based compensation expense

 

 

 

For the year ended December 31,

 

 

 

2017

 

2016

 

2015

 

 

 

(in thousands)

 

Cost of sales

 

$

2,505

 

$

1,956

 

$

2,495

 

Research and development

 

2,957

 

3,324

 

4,031

 

Selling, general, and administrative

 

12,851

 

10,433

 

11,474

 

Restructuring

 

1,880

 

 

 

Acquisition costs

 

4,203

 

 

 

 

 

 

 

 

 

 

 

Total

 

$

24,396

 

$

15,713

 

$

18,000

 

 

 

 

 

 

 

 

 

 

 

 

 

Summary of unrecognized share-based compensation costs

 

Unrecognized share-based compensation costs at December 31, 2017 are summarized below:

 

 

 

Unrecognized

 

Weighted

 

 

 

Share-Based

 

Average Period

 

 

 

Compensation

 

Expected to be

 

 

 

Costs

 

Recognized

 

 

 

(in thousands)

 

(in years)

 

Stock option awards

 

$

 12

 

0.3

 

Restricted stock units

 

6,157

 

2.8

 

Restricted stock awards

 

21,656

 

2.6

 

Performance share units

 

4,685

 

2.1

 

 

 

 

 

 

 

Total unrecognized share-based compensation cost

 

$

32,510

 

2.7

 

 

 

 

 

 

 

 

 

Schedule of options, vested and expected to vest

 

At December 31, 2017, options outstanding that have vested and are expected to vest are as follows:

 

 

 

 

 

 

 

Weighted

 

 

 

 

 

Number

 

Weighted

 

Average

 

Aggregate

 

 

 

of

 

Average

 

Remaining

 

Intrinsic

 

 

 

Shares

 

Exercise Price

 

Contractual Life

 

Value

 

 

 

(in thousands)

 

 

 

(in years)

 

(in thousands)

 

Vested

 

1,389

 

$
34.99

 

3.9

 

 

Expected to vest

 

5

 

30.18

 

4.2

 

 

 

 

 

 

 

 

 

 

 

 

Total

 

1,394

 

$
34.97

 

3.9

 

 

 

 

 

 

 

 

 

 

 

 

 

Summary of stock option activity

 

 

 

Number of
Shares

 

Weighted
Average
Exercise Price

 

 

 

(in thousands)

 

 

 

Balance - December 31, 2014

 

2,391

 

$

31.65

 

Granted

 

17

 

30.22

 

Exercised

 

(192

)

12.95

 

Expired or forfeited

 

(152

)

38.15

 

 

 

 

 

 

 

Balance - December 31, 2015

 

2,064

 

32.91

 

Granted

 

 

 

Exercised

 

(194

)

12.18

 

Expired or forfeited

 

(294

)

34.44

 

 

 

 

 

 

 

Balance - December 31, 2016

 

1,576

 

35.18

 

Granted

 

 

 

Exercised

 

(18

)

30.03

 

Expired or forfeited

 

(164

)

37.47

 

 

 

 

 

 

 

Balance - December 31, 2017

 

1,394

 

$

34.97

 

 

 

 

 

 

 

 

 

Summary of information about stock option information

 

The following table summarizes stock option information at December 31, 2017:

 

 

 

Options Outstanding

 

Options Exercisable

 

 

 

 

 

 

 

Weighted

 

 

 

 

 

 

 

Weighted

 

 

 

 

 

 

 

Aggregate

 

Average

 

Weighted

 

 

 

Aggregate

 

Average

 

Weighted

 

Range of

 

 

 

Intrinsic

 

Remaining

 

Average

 

 

 

Intrinsic

 

Remaining

 

Average

 

Exercise Prices

 

Shares

 

Value

 

Contractual Life

 

Exercise Price

 

Shares

 

Value

 

Contractual Life

 

Exercise Price

 

 

 

(in thousands)

 

(in thousands)

 

(in years)

 

 

 

(in thousands)

 

(in thousands)

 

(in years)

 

 

 

$20.00 – $30.00

 

25

 

$

 

5.0

 

$

28.13

 

23

 

$

 

5.0

 

$

28.03

 

$30.01 – $40.00

 

1,197

 

 

4.0

 

32.84

 

1,194

 

 

4.0

 

32.84

 

$40.01 – $50.00

 

39

 

 

1.3

 

48.05

 

39

 

 

1.3

 

48.05

 

$50.01 – $60.00

 

133

 

 

3.3

 

51.70

 

133

 

 

3.3

 

51.70

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1,394

 

 

3.9

 

$

34.97

 

1,389

 

$

 

3.9

 

$

34.99

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Summary of valuation assumptions for stock option grants

 

 

 

Year ended December 31,

 

 

 

2015

 

Weighted average fair value

 

$

10.58

 

Dividend yield

 

0

%

Expected volatility factor(1)

 

44

%

Risk-free interest rate(2)

 

1.18

%

Expected life (in years)(3)

 

3.9

 

 

 

(1)

Expected volatility is measured using historical daily price changes of the Company’s stock over the respective expected term of the options and the implied volatility derived from the market prices of the Company’s traded options.

(2)

The risk-free rate for periods within the contractual term of the stock options is based on the U.S. Treasury yield curve in effect at the time of grant.

(3)

The expected life is the number of years the Company estimates that options will be outstanding prior to exercise. The Company’s computation of expected life was determined using a lattice-based model incorporating historical post vest exercise and employee termination behavior.

Summary of information on options exercised

 

 

 

Year ended December 31,

 

 

 

2017

 

2016

 

2015

 

 

 

(in thousands)

 

Cash received from options exercised

 

$

431

 

$

494

 

$

2,233

 

Intrinsic value of options exercised

 

$

51

 

$

1,165

 

$

2,089

 

 

Summary of equity activity of non-vested restricted shares and performance shares

 

 

 

Number of
Shares

 

Weighted
Average
Grant Date
Fair Value

 

 

 

(in thousands)

 

 

 

Balance - December 31, 2014

 

1,237

 

$

34.27

 

Granted

 

672

 

30.33

 

Vested

 

(389

)

35.65

 

Forfeited

 

(122

)

34.46

 

 

 

 

 

 

 

Balance - December 31, 2015

 

1,398

 

31.97

 

Granted

 

1,166

 

17.59

 

Vested

 

(349

)

32.73

 

Forfeited

 

(266

)

27.31

 

 

 

 

 

 

 

Balance - December 31, 2016

 

1,949

 

23.85

 

Granted

 

674

 

29.22

 

Performance award adjustments

 

(25

)

20.95

 

Assumed from Ultratech

 

338

 

31.75

 

Vested

 

(831

)

27.67

 

Forfeited

 

(225

)

26.29

 

 

 

 

 

 

 

Balance - December 31, 2017

 

1,880

 

$

25.41

 

 

 

 

 

 

 

 

 

Summary of valuation assumptions for employee stock purchase plan

 

 

 

Year ended December 31,

 

 

 

2017

 

2016

 

Weighted average fair value

 

$

7.09

 

$

4.45

 

Dividend yield

 

0

%

0

%

Expected volatility factor(1)

 

36

%

43

%

Risk-free interest rate(2)

 

0.99

%

0.35

%

Expected life (in years)(3)

 

0.5

 

0.5

 

 

 

(1)

Expected volatility is measured using historical daily price changes of the Company’s stock over the respective expected term of the options and the implied volatility derived from the market prices of the Company’s traded options.

(2)

The risk-free rate for periods within the contractual term of the stock options is based on the U.S. Treasury yield curve in effect at the time of grant.

(3)

The expected life is the number of years the Company estimates that options will be outstanding prior to exercise. The Company’s computation of expected life was determined using a lattice-based model incorporating historical post vest exercise and employee termination behavior.