Stock-Based Compensation - Summary of RSAs (Detail) - Restricted Stock Awards - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | 12 Months Ended | ||||
|---|---|---|---|---|---|---|---|
Sep. 30, 2022 |
Sep. 30, 2021 |
Sep. 30, 2022 |
Sep. 30, 2021 |
Dec. 31, 2021 |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] | |||||||
| Compensation cost | [1] | $ 994 | $ 701 | $ 2,481 | $ 3,124 | ||
| Dividends declared on unvested RSAs | 107 | 95 | 310 | 296 | |||
| Grant date fair value of shares vested during the period | 0 | $ 0 | 3,209 | $ 3,296 | |||
| Unamortized value of RSAs | $ 5,935 | $ 5,935 | $ 4,715 | ||||
| Weighted average amortization period (in years) | 2 years 4 months 24 days | 2 years 4 months 24 days | |||||
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