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Earnings per Share - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Aug. 03, 2021
Earnings And Dividends Per Share [Abstract]          
Anti-dilutive options and restricted stock units outstanding 0 0 1,800,000 900,000  
Purchase of outstanding shares of common stock         $ 5.0
Repurchase of common stock (in shares)     520,000    
Repurchase of common stock     $ 3.7