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Changes in Accumulated Other Comprehensive Income (Loss) By Component (Detail) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |
Beginning balance | $ 1,117,086 | $ 1,052,795
Unrealized gains (losses) arising during period, before tax | 12,715 | (36,795)
Income tax effect | (3,306) | 9,717
Other comprehensive income (loss) before reclassifications | 9,409 | (27,078)
Reclassification adjustments for (gains) losses included in net income, before tax | 2,360 | (2,496)
Income tax effect | (614) | 649
Amounts reclassified from accumulated other comprehensive income (loss) to net income | 1,746 | (1,847)
Other comprehensive income (loss), net of income tax effect | 11,155 | (28,925)
Ending balance | 1,188,721 | 964,636
Unrealized Gains (Losses) on Available for Sale Securities |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |
Beginning balance | 23,312 | 14,287
Unrealized gains (losses) arising during period, before tax | 400 | (9,098)
Income tax effect | (104) | 2,366
Other comprehensive income (loss) before reclassifications | 296 | (6,732)
Reclassification adjustments for (gains) losses included in net income, before tax | (23,566) | (3,974)
Income tax effect | 6,127 | 1,033
Amounts reclassified from accumulated other comprehensive income (loss) to net income | (17,439) | (2,941)
Other comprehensive income (loss), net of income tax effect | (17,143) | (9,673)
Ending balance | 6,169 | 4,614
Unrealized Gains (Losses) on Cash Flow Hedges |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |
Beginning balance | (29,076) | (15,537)
Unrealized gains (losses) arising during period, before tax | 12,315 | (27,697)
Income tax effect | (3,202) | 7,351
Other comprehensive income (loss) before reclassifications | 9,113 | (20,346)
Reclassification adjustments for (gains) losses included in net income, before tax | 25,926 | 1,478
Income tax effect | (6,741) | (384)
Amounts reclassified from accumulated other comprehensive income (loss) to net income | 19,185 | 1,094
Other comprehensive income (loss), net of income tax effect | 28,298 | (19,252)
Ending balance | (778) | (34,789)
Total |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |
Beginning balance | (5,764) | (1,250)
Other comprehensive income (loss), net of income tax effect | 11,155 | (28,925)
Ending balance | $ 5,391 | $ (30,175)

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- Definition Amount of tax expense (benefit) allocated to other comprehensive income (loss) before reclassification adjustment from accumulated other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=121641772&loc=d3e640-108580 + Details
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