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Selected Quarterly Financial Data (Unaudited)
 12 Months Ended
Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]  
Selected Quarterly Financial Data (Unaudited)
 
Quarter Ended
 
April 1, 2018
 
July 1, 2018
 
September 30, 2018
 
December 31,
2018
 
(In thousands, except per share amounts)
Revenue
$
169,567

 
$
211,264

 
$
232,221

 
$
193,286

Gross margin
129,369

 
157,095

 
173,361

 
140,461

Operating income
34,596

 
63,455

 
77,844

 
45,247

 
 
 
 
 
 
 
 
Net income
$
37,217

 
$
56,196

 
$
80,436

 
$
45,418

 
 
 
 
 
 
 
 
Basic net income per share
$
0.21

 
$
0.33

 
$
0.47

 
$
0.26

Diluted net income per share
$
0.21

 
$
0.32

 
$
0.45

 
$
0.26

 
Quarter Ended
 
April 2, 2017
 
July 2, 2017
 
October 1, 2017
 
December 31,
2017
 
(In thousands, except per share amounts)
Revenue
$
139,039

 
$
178,080

 
$
266,042

 
$
182,922

Gross margin
106,507

 
135,916

 
197,981

 
138,390

Operating income
37,216

 
60,021

 
110,849

 
50,775

 
 
 
 
 
 
 
 
Net income (loss)
$
45,471

 
$
56,495

 
$
102,493

 
$
(27,747
)
 
 
 
 
 
 
 
 
Basic net income (loss) per share (1)
$
0.26

 
$
0.33

 
$
0.59

 
$
(0.16
)
Diluted net income (loss) per share (1) (2)
$
0.25

 
$
0.32

 
$
0.57

 
$
(0.16
)



(1) Prior period results have been adjusted to reflect the two-for-one stock split effected in the form of a stock dividend which occurred in the quarter ended December 31, 2017.

(2) As a result of the net loss recorded for the quarter ended December 31, 2017, potential common stock equivalents of 7,145 were not included in the calculation of diluted net loss per share for this quarter.