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Share-based Compensation - Additional Information (Detail) $ / shares in Units, $ in Thousands | 12 Months Ended
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Dec. 31, 2023 USD ($) Bank $ / shares shares | Dec. 31, 2022 USD ($) $ / shares shares | Dec. 31, 2021 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Unrecognized compensation expense | $ 3,800 |  |
Weighted average period cost expected to be recognized | 1 year 9 months 18 days |  |
Stock options, expiration term from date of grant | 10 years |  |
Share-based compensation expense | $ 2,681 | $ 2,595 | $ 2,436
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] |  |  |
Shares granted under the plan | shares | 0 |  |
2021Plan |  |  |
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 | (1,116,555) |  |
2021Plan | Performance Stock Units |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Unrecognized compensation expense | $ 1,300 |  |
Weighted average period cost expected to be recognized | 1 year 10 months 24 days |  |
Number of shares granted | shares | 53,696 |  |
Total fair value of granted shares | $ 1,000 |  |
Grant date fair value, vested | $ / shares | $ 21.08 |  |
Number of regional banks | Bank | 50 |  |
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 | $ 2,500 |  |
Weighted average period cost expected to be recognized | 1 year 9 months 18 days |  |
Total fair value of vested shares | $ 1,400 | $ 2,100 | $ 2,700
Number of shares granted | shares | 131,021 | 101,271 | 75,679
Grant date fair value, vested | $ / shares | $ 19.34 | $ 23.95 | $ 16.01
2013 and 2021 Plan | Performance Stock Units |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Total fair value of vested shares | $ 2,600 |  |
Number of shares granted | shares | 53,696 | 38,036 | 42,626
Grant date fair value, vested | $ / shares | $ 9.65 |  |
Share-based compensation expense | $ 700 |  |
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 |  |

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