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Changes in Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Beginning balance, net of tax | $ (18,051) | $ (37,171) | $ (22,863) | $ (43,058)
Other comprehensive income (loss) before reclassification, before tax | 11,986 | (1,372) | 17,888 | 4,797
Amounts reclassified from accumulated other comprehensive income, before tax | 801 | 118 | 833 | 1,311
Other comprehensive income (loss), before tax | 12,787 | (1,254) | 18,721 | 6,108
Income tax benefit (expense) | (2,583) | 308 | (3,705) | (1,167)
Ending balance, net of tax | (7,847) | (38,117) | (7,847) | (38,117)
Unrealized Gains and Losses on Available for Sale Securities |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Beginning balance, net of tax | (17,882) | (36,912) | (22,715) | (42,958)
Other comprehensive income (loss) before reclassification, before tax | 11,912 | (1,191) | 17,841 | 5,179
Amounts reclassified from accumulated other comprehensive income, before tax | 801 | 118 | 833 | 1,311
Other comprehensive income (loss), before tax | 12,713 | (1,073) | 18,674 | 6,490
Income tax benefit (expense) | (2,568) | 270 | (3,696) | (1,247)
Ending balance, net of tax | (7,737) | (37,715) | (7,737) | (37,715)
Foreign Currency Items |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Beginning balance, net of tax | (169) | (259) | (148) | (100)
Other comprehensive income (loss) before reclassification, before tax | 74 | (181) | 47 | (382)
Amounts reclassified from accumulated other comprehensive income, before tax | 0 | 0 | 0 | 0
Other comprehensive income (loss), before tax | 74 | (181) | 47 | (382)
Income tax benefit (expense) | (15) | 38 | (9) | 80
Ending balance, net of tax | $ (110) | $ (402) | $ (110) | $ (402)

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