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Stock Based Compensation (Tables)
9 Months Ended
Sep. 30, 2020
Share-based Payment Arrangement [Abstract]  
Share-based Compensation Arrangements by Share-based Payment Award, Restricted Stock Units, Vested and Expected to Vest
The following table summarizes the RSUs awarded to Company executives in 2018, 2019 and 2020, and the number of such RSUs remaining unvested as of September 30, 2020:
Number of RSUs GrantedWeighted-Average Grant Date Fair ValueNumber of Unvested RSUs
2018 Award 3,225 $52.95 433 
2019 Award3,734 47.75 2,120 
2020 Award8,91836.26 8,918 
Total15,87711,471