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Changes in Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Beginning balance, net of tax | $ (22,863) | $ (43,058)
Other comprehensive income (loss) before reclassification, before tax | 3,522 | 9,874
Amounts reclassified from accumulated other comprehensive income, before tax | 25 | 606
Other comprehensive income (loss), before tax | 3,547 | 10,480
Income tax benefit (expense) | (679) | (2,037)
Ending balance, net of tax | (19,995) | (34,615)
Unrealized Gains and Losses on Available for Sale Securities |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Beginning balance, net of tax | (22,715) | (42,958)
Other comprehensive income (loss) before reclassification, before tax | 3,608 | 10,128
Amounts reclassified from accumulated other comprehensive income, before tax | 25 | 606
Other comprehensive income (loss), before tax | 3,633 | 10,734
Income tax benefit (expense) | (697) | (2,090)
Ending balance, net of tax | (19,779) | (34,314)
Foreign Currency Items |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Beginning balance, net of tax | (148) | (100)
Other comprehensive income (loss) before reclassification, before tax | (86) | (254)
Amounts reclassified from accumulated other comprehensive income, before tax | 0 | 0
Other comprehensive income (loss), before tax | (86) | (254)
Income tax benefit (expense) | 18 | 53
Ending balance, net of tax | $ (216) | $ (301)

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