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Stockholders' Equity - Reclassifications Out of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2022 | Mar. 31, 2021
Reclassification Adjustment Out of Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
(Loss) Income Before Income Taxes | $ (3,535) | $ 1,944
Tax benefit (expense) | 2,408 | (1,048)
Net (Loss) Income | (1,127) | 896
Reclassification Out of Accumulated Other Comprehensive Income (Loss) [Member] |  |
Reclassification Adjustment Out of Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
(Loss) Income Before Income Taxes | (311) | 35
Tax benefit (expense) | 73 | 1
Net (Loss) Income | (238) | 36
Reclassification Out of Accumulated Other Comprehensive Income (Loss) [Member] | Unrealized Gains (Losses) on Available-for-Sale Securities [Member] |  |
Reclassification Adjustment Out of Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Net investment gain (loss) | (330) | 178
Reclassification Out of Accumulated Other Comprehensive Income (Loss) [Member] | Other Income (Expense), Net [Member] |  |
Reclassification Adjustment Out of Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Defined benefit plan adjustments - actuarial gain | $ 19 | $ (143)

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