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Stock-Based Compensation (Tables)
6 Months Ended
Jul. 26, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Allocation Of Stock-Based Compensation
The following table summarizes pre-tax, stock-based compensation expense included in the unaudited condensed consolidated statements of operations captions for the three and six months ended July 26, 2015 and July 27, 2014, respectively.
 
 
Three Months Ended
 
Six Months Ended
(in thousands)
July 26, 2015
 
July 27, 2014
 
July 26, 2015
 
July 27, 2014
Cost of sales
$
400

 
$
355

 
$
875

 
$
718

Selling, general and administrative
(141
)
 
3,448

 
3,073

 
7,513

Product development and engineering
2,076

 
2,472

 
4,333

 
4,891

Stock-based compensation
$
2,335

 
$
6,275

 
$
8,281

 
$
13,122

Net change in stock-based compensation capitalized into inventory
$
204

 
$
37

 
$
279

 
$
28

Summary Of Fair Value Assumptions, Stock Options
The following table summarizes the assumptions used in the Black-Scholes model to determine the fair value of stock options granted in the three and six months ended July 26, 2015 and July 27, 2014, respectively:
 
 
Three Months Ended
 
Six Months Ended
 
July 26, 2015
 
July 27, 2014
 
July 26, 2015
 
July 27, 2014
Expected lives, in years
4.2
 
4.3 - 4.4
 
4.2 - 4.3
 
3.0 - 4.4
Estimated volatility
32%
 
33%
 
29% - 32%
 
33% - 34%
Dividend yield
 
 
 
Risk-free interest rate
1.3%
 
1.30% - 1.43%
 
1.24% - 1.29%
 
1.26% - 1.43%
Weighted average fair value on grant date
$6.50
 
$7.43
 
$7.32
 
$7.26
Summary Of The Activity For Stock Option Awards
The following table summarizes the activity for stock options for the six months ended July 26, 2015:
 
 
 
 
 
 
 
 
 
 
 
 
(in thousands, except for per share amounts)
Number
of
Shares
 
Weighted
Average
Exercise
Price
(per share)
 
Aggregate
Intrinsic
Value
 
Aggregate
Unrecognized
Compensation
 
Number of
Shares
Exercisable
 
Weighted
Average
Contractual
Term
(in years)
Balance at January 25, 2015
1,763

 
$
23.70

 
$
7,722

 
$
4,688

 
986
 
 
Options granted
184

 
28.21

 
 
 
 
 
 
 
 
Options exercised
(186
)
 
15.96

 
1,592

 
 
 
 
 
 
Options cancelled/forfeited
(132
)
 
26.18

 
 
 
 
 
 
 
 
Balance at July 26, 2015
1,629

 
$
24.89

 
$
552

 
$
4,340

 
943
 
 
Exercisable at July 26, 2015
943

 
$
23.25

 
$
552

 
 
 
 
 
2.5
Summary Of The Activity For Employee Stock Unit Awards
The following table summarizes the employees’ restricted stock unit activity for the six months ended July 26, 2015:
(in thousands, except for per unit amounts)
Number of
Units
 
Weighted Average
Grant Date
Fair Value
(per unit)
 
Aggregate
Intrinsic
Value (1)
 
Aggregate
Unrecognized
Compensation
 
Weighted Average
Period Over
Which Expected
to be Recognized
(in years)
Balance at January 25, 2015
2,138

 
$
26.43

 
 
 
$
44,506

 
2.4
Restricted stock units granted
370

 
27.10

 
 
 
 
 
 
Restricted stock units vested
(340
)
 
27.78

 
$
9,325

 
 
 
 
Restricted stock units forfeited
(220
)
 
26.15

 
 
 
 
 
 
Balance at July 26, 2015
1,948

 
$
26.35

 
 
 
$
39,039

 
2.3

(1)
Reflects the value of Semtech Corporation stock on the date that the restricted stock unit vested.
Performance shares [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Summary Of The Activity For Performance Unit Awards
The following table summarizes the activity for performance-based restricted stock units for the six months ended July 26, 2015:
 
 
 
Subject to
Share Settlement
 
Subject to
Cash Settlement
 
Weighted 
Average
Grant Date Fair Value
(per unit)
 
Aggregate Unrecognized
Compensation
 
Weighted Average Period Over
Which Expected to be Recognized
(in years)
(in thousands, except for per unit amounts)
Total
Units
 
Units
 
Units
 
Recorded
Liability
 
 
 
Balance at January 25, 2015
426

 
211

 
215

 
$
1,891

 
$
27.17

 
$
6,164

 
1.6
Performance-based units granted
235

 
145

 
90

 
 
 
28.60

 
 
 
 
Performance-based units vested

 

 

 
 
 

 
 
 
 
Performance-based units cancelled/forfeited
(70
)
 
(40
)
 
(30
)
 
 
 
27.93

 
 
 
 
Change in liability
 
 
 
 
 
 
(1,317
)
 
 
 
 
 
 
Balance at July 26, 2015
591

 
316

 
275

 
$
574

 
$
27.65

 
$
4,485

 
1.7
Market performance shares [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Summary Of The Activity For Performance Unit Awards
The following table summarizes the activity for market performance restricted stock units for the six months ended July 26, 2015:
 
 
 
Weighted 
Average
Grant Date Fair Value
(per unit)
 
Aggregate Unrecognized
Compensation
 
Period Over
Which Expected to be Recognized
(in years)
(in thousands, except for per unit amounts)
Total
Units
 
 
 
Balance at January 25, 2015
220

 
$
15.59

 
$

 
1.2
Market performance units granted

 

 
 
 
 
Market performance units vested

 

 
 
 
 
Market performance units cancelled/forfeited

 

 
 
 
 
Balance at July 26, 2015
220

 
$
15.59

 
$
827

 
0.5
Subject To Cash Settlement [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Summary Of The Activity For Non-Employee Directors Stock Unit Awards
The following table summarizes the non-employee directors’ activity for restricted stock units settled in cash for the six months ended July 26, 2015:
 
(in thousands, except for per unit amounts)
Number of
Units
 
Recorded
Liability
 
Weighted Average
Grant Date
Fair Value
(per unit)
 
Aggregate
Unrecognized
Compensation
 
Period Over
Which Expected
to  be Recognized
(in years)
Balance at January 25, 2015
24

 
$
5,214

 
$
26.59

 
$
275

 
0.4
Restricted stock units granted
28

 
 
 
19.70

 
 
 
 
Restricted stock units vested
(24
)
 
 
 
26.59

 
 
 
 
Restricted stock units forfeited

 
 
 

 
 
 
 
Change in liability
 
 
(1,447
)
 
 
 
 
 
 
Balance at July 26, 2015
28

 
$
3,767

 
$
19.70

 
$
472

 
0.9
Subject To Share Settlement [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Summary Of The Activity For Non-Employee Directors Stock Unit Awards
The following table summarizes the non-employee directors’ activity for restricted stock units settled with stock for the six months ended July 26, 2015:
 
(in thousands, except for per unit amounts)
Number of
Units
 
Weighted Average
Grant Date
Fair Value
(per unit)
 
Aggregate Intrinsic Value (1)
 
Aggregate
Unrecognized
Compensation
 
Period Over
Which Expected
to  be Recognized
(in years)
Balance at January 25, 2015

 
$

 
 
 
$

 
0.0
Restricted stock units granted
24

 
19.70

 
 
 
 
 
 
Restricted stock units vested

 
 
 

 
 
 
 
Restricted stock units forfeited

 
 
 
 
 
 
 
 
Balance at July 26, 2015
24

 
$
19.70

 
 
 
$
444

 
0.9

(1)
There was no vesting during the reported period. This value would typically represent the value of Semtech Corporation stock on the date that the restricted stock unit vested.