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Other Comprehensive Income (Loss) - Components of Other Comprehensive Income (loss) Pre-Tax and After-Tax (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
After-tax |  |  |
Other comprehensive income (loss) | $ (18,911) | $ (17,618) | $ 28,374
Net changes related to available-for-sale securities |  |  |
Pre-tax |  |  |
Unrealized holding gains (losses) arising during the period | (24,477) | 33,575 | 38,129
Less: Reclassification adjustments (gains) losses realized in net income | (215) | (56,914) | (492)
Other comprehensive income (loss) | (24,692) | (23,339) | 37,637
Tax |  |  |
Unrealized holding gains (losses) arising during the period | (5,731) | 7,884 | 9,384
Less: Reclassification adjustments (gains) losses realized in net income | (50) | (13,605) | (121)
Other comprehensive income (loss) | (5,781) | (5,721) | 9,263
After-tax |  |  |
Unrealized holding gains (losses) arising during the period | (18,746) | 25,691 | 28,745
Less: Reclassification adjustments (gains) losses realized in net income | (165) | (43,309) | (371)
Other comprehensive income (loss) | (18,911) | (17,618) | 28,374
Net changes related to available-for-sale securities | Cumulative Effect, Period of Adoption, Adjustment |  |  |
Pre-tax |  |  |
Less: Reclassification adjustments (gains) losses realized in net income | 0 | 791 | 0
Tax |  |  |
Less: Reclassification adjustments (gains) losses realized in net income | 0 | 194 | 0
After-tax |  |  |
Less: Reclassification adjustments (gains) losses realized in net income | 0 | 597 | 0
Net changes related to available-for-sale securities | Cumulative Effect, Period of Adoption, Adjusted Balance |  |  |
Pre-tax |  |  |
Other comprehensive income (loss) | (24,692) | (22,548) | 37,637
Tax |  |  |
Other comprehensive income (loss) | (5,781) | (5,527) | 9,263
After-tax |  |  |
Other comprehensive income (loss) | $ (18,911) | $ (17,021) | $ 28,374

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