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Stock Plans (Tables)
12 Months Ended
Dec. 31, 2019
Share-based Payment Arrangement [Abstract]  
Stock Activity
RSU activity was as follows for the year ended December 31, 2019:
 
Number of Shares

 
Weighted-Average Grant Date Fair Value Per Share

Balance at December 31, 2018
2,129,626

 
$
64.94

Granted
719,677

 
$
52.03

Vested
(611,657
)
 
$
59.78

Forfeited
(328,004
)
 
$
66.52

Balance at December 31, 2019
1,909,642

 
$
61.46