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Earnings (Loss) Per Share (EPS) (Tables)
 9 Months Ended
Sep. 29, 2017
Earnings Per Share [Abstract]  
Schedule of Calculation of Numerator and Denominator in Earnings Per Share
The following table illustrates the calculation of basic and diluted EPS (in thousands, except per share amounts):
 
Three Months Ended
 
Nine Months Ended
 
September 29,
2017
 
September 30,
2016
 
September 29,
2017
 
September 30,
2016
Numerator for basic and diluted EPS:
 
 
 
 
 
 
 
Net income (loss)
$
13,690

 
$
11,458

 
$
12,341

 
$
(1,972
)
Denominator for basic EPS:
 
 
 
 
 
 
 
Weighted average shares outstanding
31,594

 
30,782

 
31,304

 
30,756

Effect of dilutive securities:
 
 
 
 
 
 
 
Stock options, restricted stock and RSUs
579

 
371

 
420

 
—

Denominator for diluted EPS
32,173

 
31,153

 
31,724

 
30,756

Basic EPS
$
0.43

 
$
0.37


$
0.39

 
$
(0.06
)
Diluted EPS
$
0.43

 
$
0.37

 
$
0.39

 
$
(0.06
)
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share
The diluted weighted average share calculations do not include the following securities, which are not dilutive to the EPS calculations or the performance criteria have not been met (in thousands):
 
Three Months Ended
 
Nine Months Ended
 
September 29,
2017
 
September 30,
2016
 
September 29,
2017
 
September 30,
2016
Time-vested stock options, restricted stock and RSUs
295

 
629

 
850

 
1,862

Performance-vested restricted stock and PSUs
188

 
373

 
320

 
417