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Net Income Per Share - Narrative (Details) - shares
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Stock Options        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Stock options not included in the earnings per share calculation (in shares) 0 0 0 0