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Earnings (Loss) per Share - Antidilutive (Details) - shares
shares in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Earnings Per Share [Abstract]        
Potentially anti-dilutive shares (in shares) 288 135 286 91