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Changes in Accumulated Other Comprehensive Income (Loss) By Component (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
Beginning balance | $ 1,188,721 | $ 964,636 | $ 1,117,086 | $ 1,052,795
Unrealized gains (losses) arising during period, before tax | 598 | 28,946 | 13,313 | (7,849)
Income tax effect | (156) | (7,498) | (3,462) | 2,219
Other comprehensive income (loss) before reclassifications | 442 | 21,448 | 9,851 | (5,630)
Reclassification adjustments for (gains) losses included in net income, before tax | (766) | (1,635) | 1,594 | (4,132)
Income tax effect | 199 | 397 | (415) | 1,047
Amounts reclassified from accumulated other comprehensive income (loss) to net income | (567) | (1,238) | 1,179 | (3,085)
Other comprehensive income (loss), net of income tax effect | (125) | 20,210 | 11,030 | (8,715)
Ending balance | 1,250,729 | 1,007,847 | 1,250,729 | 1,007,847
Total |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
Beginning balance | 5,391 | (30,175) | (5,764) | (1,250)
Other comprehensive income (loss), net of income tax effect | (125) | 20,210 | 11,030 | (8,715)
Ending balance | 5,266 | (9,965) | 5,266 | (9,965)
Unrealized Gains (Losses) on Available for Sale Securities |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
Beginning balance | 6,169 | 4,614 | 23,312 | 14,287
Unrealized gains (losses) arising during period, before tax | 592 | 35,315 | 992 | 26,217
Income tax effect | (154) | (9,182) | (258) | (6,816)
Other comprehensive income (loss) before reclassifications | 438 | 26,133 | 734 | 19,401
Reclassification adjustments for (gains) losses included in net income, before tax | (1,812) | (4,353) | (25,378) | (8,328)
Income tax effect | 471 | 1,131 | 6,598 | 2,165
Amounts reclassified from accumulated other comprehensive income (loss) to net income | (1,341) | (3,222) | (18,780) | (6,163)
Other comprehensive income (loss), net of income tax effect | (903) | 22,911 | (18,046) | 13,238
Ending balance | 5,266 | 27,525 | 5,266 | 27,525
Unrealized Gains (Losses) on Cash Flow Hedges |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
Beginning balance | (778) | (34,789) | (29,076) | (15,537)
Unrealized gains (losses) arising during period, before tax | 6 | (6,369) | 12,321 | (34,066)
Income tax effect | (2) | 1,684 | (3,204) | 9,035
Other comprehensive income (loss) before reclassifications | 4 | (4,685) | 9,117 | (25,031)
Reclassification adjustments for (gains) losses included in net income, before tax | 1,046 | 2,718 | 26,972 | 4,196
Income tax effect | (272) | (734) | (7,013) | (1,118)
Amounts reclassified from accumulated other comprehensive income (loss) to net income | 774 | 1,984 | 19,959 | 3,078
Other comprehensive income (loss), net of income tax effect | 778 | (2,701) | 29,076 | (21,953)
Ending balance | $ 0 | $ (37,490) | $ 0 | $ (37,490)

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