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Stock Plans (Tables)
12 Months Ended
Dec. 31, 2020
Share-based Payment Arrangement [Abstract]  
Schedule of Restricted Stock Units Activity
RSU activity was as follows for the year ended December 31, 2020:
Number of SharesWeighted-Average Grant Date Fair Value Per Share
Balance at December 31, 20191,909,642 $61.46 
Granted1,162,118 $42.59 
Vested(542,331)$66.22 
Forfeited(290,050)$51.91 
Balance at December 31, 20202,239,379 $51.76