Quarterly report pursuant to Section 13 or 15(d)

Stock Based Compensation - Additional Information (Detail)

v3.22.1
Stock Based Compensation - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Weighted average exercise price $ 32.95  
Stock options exercised by employees and directors 5,250 0
Number of shares of non-vested stock that vested 9,079 9,307
Performance Shares [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Amortization of non-vested stock grants and performance-based awards $ 1,661,000 $ 1,453,000
Stock option plan, share based compensation, vesting period (in years) 3 years  
Aggregate fair value $ 800  
Shares granted under performance plan 10,148  
Employees and Directors [Member] | Non-Vested Shares [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock option plan, share based compensation, vesting period (in years) 5 years  
Shares of non-vested stock issued 9,574  
Aggregate fair value $ 1,400  
Employees and Directors [Member] | Non-Vested Shares [Member] | Minimum [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value $ 134.69  
Employees and Directors [Member] | Non-Vested Shares [Member] | Maximum [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value $ 149.73