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Restructuring and Severance Charges (Tables)
12 Months Ended
Dec. 31, 2020
Restructuring and Severance Charges [Abstract]  
Restructuring and Severance Charges
Beginning Balance at January 1, 2019
 
$
15,462
 
Amounts Paid
   
(15,046
)
Adjustments
   
(416
)
Balance December 31, 2019
 
$