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Schedule of Antidilutive Securities Excluded from Computation of Diluted Earnings Per Share (Details) - shares
shares in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Restricted Stock Units (RSUs) [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share    
Antidilutive securities 599 0
Employee Stock Option [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share    
Antidilutive securities 32 0