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Earnings (Loss) Per Share - Schedule of Common Shares Excluded from Diluted Earnings (Loss) per Share (Details) - shares
shares in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Restricted stock awards and PSUs        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Anti-dilutive stock-based compensation awards (in shares) 10,406 7,515 10,369 7,440