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Net Earnings Per Share - Additional Information (Details) - shares
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Share-Based Awards      
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]      
Antidilutive securities excluded from the calculation of net earnings per share - diluted (in shares) 401,000 264,000 0