Quarterly report pursuant to Section 13 or 15(d)

Earnings per Share - Additional Information (Detail)

v3.21.1
Earnings per Share - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
2013 Equity Compensation Plan | Performance Stock Units    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Share-based compensation arrangement by share-based payment award, additional shares issued 42,626  
Total fair value of vested shares $ 784,000  
Share based compensation arrangement by share based payment award equity instruments other than options, grant date Mar. 24, 2021  
Stock options, expiration term from date of grant 3 years  
Share-based compensation arrangement by share based payment award, performance stock units outstanding 66,563 0
Share-based compensation arrangement by share based payment award, performance stock units aggregate grant fair value $ 1,000  
Stock option awards    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive securities excluded from computation of diluted EPS (shares) 0 0