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STOCK-BASED COMPENSATION
6 Months Ended
Jun. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
STOCK-BASED COMPENSATION
STOCK-BASED COMPENSATION
The Company has stock-based compensation plans under which employees and non-employee directors may be granted stock-based awards such as stock options, restricted stock, RSUs, and PSUs.
The following table provides stock-based compensation by the financial statement line item in which it is reflected:
 
Three Months Ended
 
Six Months Ended
 
June 30, 2018
 
July 1, 2017
 
June 30, 2018
 
July 1, 2017
 
(in thousands)
Cost of revenue
$
1,738

 
$
1,743

 
$
3,151

 
$
3,289

Selling, general and administrative
11,809

 
10,147

 
20,937

 
18,087

Stock-based compensation
$
13,547

 
$
11,890

 
$
24,088

 
$
21,376


During the six months ended June 30, 2018, the Company granted stock options representing 0.5 million common shares with a per-share weighted-average grant date fair value of $24.80, RSUs representing 0.2 million common shares with a per-share weighted-average grant date fair value of $109.09, and PSUs representing 0.2 million common shares with a per-share weighted-average grant date fair value of $117.28. The maximum number of common shares to be issued upon vesting of PSUs granted during the six months ended June 30, 2018 is 0.4 million.