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Stockholders' Equity - Summary of PSU Activity Under the 2019 Incentive Award Plan (Details) - $ / shares
1 Months Ended 9 Months Ended
Jul. 31, 2020
Sep. 30, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Balance at December 31, 2019   4,236,248
Balance at September 30, 2020   3,048,413
2019 Incentive Award Plan | Performance-Based Stock Units (PSU)    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Stock awards, granted 204,750 204,750
Balance at September 30, 2020   204,750
Weighted Average Grant Date Fair Value Per Share, Granted   $ 32.06
Weighted Average Grant Date Fair Value Per Share, Unvested Ending Balance   $ 32.06