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Equity Awards and Instruments - Additional Narrative (Details) - USD ($)
$ / shares in Units, $ in Thousands
9 Months Ended 12 Months Ended
Aug. 28, 2020
Dec. 31, 2014
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock options exercise price reduction (USD per share) $ 1.50        
Stock Option          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Unrecognized compensation cost     $ 7,825    
Cost not yet recognized, period for recognition     1 year 10 months 24 days    
Stock options exercised, intrinsic value     $ 58,502 $ 21,555  
Expected dividend yield   0.00% 1.11%   1.38%
Value of shares repurchased by Company after exercised by employee     $ 1,454 $ 4,952  
Stock Option | 2020 Incentive Award Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Proceeds from stock options exercised     7,776   $ 3,612
Restricted Stock and Restricted Stock Units (RSUs)          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Unrecognized compensation cost, excluding options     $ 16,915    
Cost not yet recognized, period for recognition     3 years 8 months 12 days