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Earnings (Loss) Per Share (Details) - $ / shares
shares in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Weighted average number of common shares outstanding, basic (in shares) 53,982 53,889 53,955 53,854
Weighted average number of common shares outstanding, diluted (in shares) 54,078 53,918 54,042 53,896
Effect of dilutive shares on earnings (loss) per share (in usd per share) $ 0 $ 0 $ (0.01) $ 0
Antidilutive shares excluded from computation of earnings per share (in shares) 37 177 25 119
Restricted Share Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Dilutive securities (in shares) 92 29 84 41
Performance Share Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Dilutive securities (in shares) 4 0 3 1