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Net Income Per Share - Antidilutive Securities Excluded from Computation of Earning Per Share (Details) - shares
shares in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Outstanding Stock Options    
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Antidilutive securities excluded from computation of loss per share calculation, shares 2,216 1,896
Unvested Restricted Stock Units    
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Antidilutive securities excluded from computation of loss per share calculation, shares 744 58