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Earnings (Loss) Per Share - Additional Information (Detail) - shares
shares in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Common Stock Options Unvested Restricted Stock and Unvested Performance Stock Units [Member]        
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]        
Number of anti-dilutive securities excluded from EPS computation 859 136 847 917