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Earnings (Loss) Per Share - Anti-dilutive Securities Excluded from Computation of Earnings (Loss) Per Share (Detail) - shares
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Share-based compensation awards        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Total anti-dilutive securities (shares) 711,000 3,813,959 463,145 3,674,506