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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 |  |

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