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Equity Plan Awards - Unamortized Stock-Based Compensation Expenses (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock-based compensation | $ 6,138 | $ 5,684 | $ 6,880
Unamortized Stock-Based Compensation | 9,310 | 9,243 | 9,879
Restricted Stock |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock-based compensation | 4,830 | 4,407 | 5,682
Unamortized Stock-Based Compensation | $ 6,593 | $ 6,585 | $ 6,804
Remaining Weighted Average Period (years) | 1 year 9 months 18 days | 1 year 9 months 18 days | 1 year 9 months 18 days
Unrestricted Stock |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock-based compensation | $ 520 | $ 499 | $ 421
Unamortized Stock-Based Compensation | $ 217 | $ 217 | $ 187
Remaining Weighted Average Period (years) | 4 months 24 days | 4 months 24 days | 4 months 24 days
Performance Based Restricted Stock |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock-based compensation | $ 788 | $ 778 | $ 777
Unamortized Stock-Based Compensation | $ 2,500 | $ 2,441 | $ 2,888
Remaining Weighted Average Period (years) | 1 year 9 months 18 days | 1 year 9 months 18 days | 1 year 9 months 18 days

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