Annual report pursuant to Section 13 and 15(d)

Share-based Compensation - Additional Information (Detail)

v3.22.4
Share-based Compensation - Additional Information (Detail)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2022
USD ($)
Bank
Plan
$ / shares
shares
Dec. 31, 2021
USD ($)
$ / shares
shares
Dec. 31, 2020
USD ($)
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of incentive plans | Plan 1    
Unrecognized compensation expense $ 2,200    
Weighted average period cost expected to be recognized 1 year 10 months 24 days    
Stock options, expiration term from date of grant 10 years    
Share-based compensation expense $ 2,595 $ 2,436 $ 2,544
Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Period of continuous service 3 years    
Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Period of continuous service 5 years    
2013 Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares of common stock to be granted under equity incentive awards | shares 1,500,000    
Shares available for issuance under the Plan | shares (1,326,699)    
2021Plan | Performance Stock Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares granted | shares 38,036    
Total fair value of granted shares $ 900    
Grant date fair value, vested | $ / shares $ 25.10    
Number of regional banks | Bank 51    
2013 and 2021 Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unrecognized compensation expense $ 0    
Options granted in period (shares) | shares 0 0 0
Stock options, expiration term from date of grant   10 years  
2013 and 2021 Plan | Restricted stock awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unrecognized compensation expense $ 2,200    
Weighted average period cost expected to be recognized 1 year 10 months 24 days    
Total fair value of vested shares $ 2,100 $ 2,700 $ 1,400
Number of shares granted | shares 101,271 75,679 125,896
Grant date fair value, vested | $ / shares $ 23.95 $ 16.01 $ 24.68
2013 and 2021 Plan | Performance Stock Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total fair value of vested shares $ 3,900    
Number of shares granted | shares 38,036 42,626 23,937
Share-based compensation expense $ 800    
2013 and 2021 Plan | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Period of continuous service   3 years  
2013 and 2021 Plan | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Period of continuous service   5 years  
2013 Equity Compensation Plan | Performance Stock Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options, expiration term from date of grant 3 years    
Share-based compensation arrangement by share-based payment award, vesting rights Each PSU that vests entitles the recipient to receive one share of the Company’s common stock on a specified issuance date