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Changes in Accumulated Other Comprehensive Income (Loss) By Component (Detail) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |
Beginning balance | $ 1,052,795 | $ 956,816
Unrealized gains (losses) arising during period, before tax | (36,795) | 10,878
Income tax effect | 9,717 | (2,828)
Other comprehensive income (loss) before reclassifications | (27,078) | 8,050
Reclassification adjustments for losses (gains) included in net income, before tax | (2,496) | (413)
Income tax effect | 649 | 107
Amounts reclassified from accumulated other comprehensive income (loss) to net income | (1,847) | (306)
Other comprehensive income (loss), net of income tax effect | (28,925) | 7,744
Ending balance | 964,636 | 978,373
Unrealized Gains (Losses) on Available for Sale Securities |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |
Beginning balance | 14,287 | (21,741)
Unrealized gains (losses) arising during period, before tax | (9,098) | 17,817
Income tax effect | 2,366 | (4,632)
Other comprehensive income (loss) before reclassifications | (6,732) | 13,185
Reclassification adjustments for losses (gains) included in net income, before tax | (3,974) | 0
Income tax effect | 1,033 | 0
Amounts reclassified from accumulated other comprehensive income (loss) to net income | (2,941) | 0
Other comprehensive income (loss), net of income tax effect | (9,673) | 13,185
Ending balance | 4,614 | (8,556)
Unrealized Gains (Losses) on Cash Flow Hedges |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |
Beginning balance | (15,537) | (922)
Unrealized gains (losses) arising during period, before tax | (27,697) | (6,939)
Income tax effect | 7,351 | 1,804
Other comprehensive income (loss) before reclassifications | (20,346) | (5,135)
Reclassification adjustments for losses (gains) included in net income, before tax | 1,478 | (413)
Income tax effect | (384) | 107
Amounts reclassified from accumulated other comprehensive income (loss) to net income | 1,094 | (306)
Other comprehensive income (loss), net of income tax effect | (19,252) | (5,441)
Ending balance | (34,789) | (6,363)
Total |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |
Beginning balance | (1,250) | (22,663)
Other comprehensive income (loss), net of income tax effect | (28,925) | 7,744
Ending balance | $ (30,175) | $ (14,919)

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