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Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Changes in accumulated other comprehensive income (loss) by component, net of tax |  |  |  |
Beginning balance | $ 1,217,585 | $ 1,186,141 | $ 1,220,434 | $ 994,964
Unrealized gains (losses) on debt securities available for sale: |  |  |  |
Unrealized holding gains (losses) on debt securities available for sale, Tax Effect | (1,670) | (5,189) | (10,259) | (7,129)
Unrealized holding gains (losses) on debt securities available for sale, Net of Tax | 4,187 | 13,025 | 25,684 | 17,885
Unrealized gains on debt securities transferred from held to maturity to available for sale, Tax Effect |  |  |  | 1,364
Unrealized gains on debt securities transferred from held to maturity to available for sale, Net of Tax |  |  |  | 3,416
Amounts reclassified from accumulated other comprehensive income, Before Tax |  |  | (1,699) | 193
Amounts reclassified from accumulated other comprehensive income, Tax Effect | 41 | (3) | 489 | (55)
Amounts reclassified from accumulated other comprehensive income, Net of Tax | (102) | 7 | (1,210) | 138
Unrealized gains (losses) on cash flow hedges: |  |  |  |
Unrealized holding gains (losses) on cash flow hedges, Tax Effect | (4) |  | (896) |
Unrealized holding gains (losses) on cash flow hedges, Net of Tax | (10) |  | (2,247) |
Amounts reclassified from accumulated other comprehensive income, Tax Effect | (56) |  | (60) |
Amounts reclassified from accumulated other comprehensive income, Net of Tax | (139) |  | (150) |
Ending balance | 1,236,084 | 1,203,608 | 1,236,084 | 1,203,608
Accumulated Other Comprehensive Income (Loss) |  |  |  |
Changes in accumulated other comprehensive income (loss) by component, net of tax |  |  |  |
Beginning balance | 33,101 | 1,595 | 14,960 | (6,812)
Unrealized gains (losses) on cash flow hedges: |  |  |  |
Accumulated other comprehensive income (loss) ending balance period, Before Tax | 51,803 | 20,459 | 51,803 | 20,459
Accumulated other comprehensive income (loss) ending balance period, Tax Effect | (14,766) | (5,832) | (14,766) | (5,832)
Ending balance | 37,037 | 14,627 | 37,037 | 14,627
Unrealized gains (losses) on debt securities available for sale |  |  |  |
Changes in accumulated other comprehensive income (loss) by component, net of tax |  |  |  |
Accumulated other comprehensive income (loss) beginning balance period, Before Tax | 49,722 | 2,235 | 21,192 | (9,528)
Accumulated other comprehensive income (loss) beginning balance period, Tax Effect | (14,173) | (640) | (6,032) | 2,716
Beginning balance | 35,549 | 1,595 | 15,160 | (6,812)
Unrealized gains (losses) on debt securities available for sale: |  |  |  |
Unrealized holding gains (losses) on debt securities available for sale, Before Tax | 5,857 | 18,214 | 35,943 | 25,014
Unrealized holding gains (losses) on debt securities available for sale, Tax Effect | (1,670) | (5,189) | (10,259) | (7,129)
Unrealized holding gains (losses) on debt securities available for sale, Net of Tax | 4,187 | 13,025 | 25,684 | 17,885
Unrealized gains on debt securities transferred from held to maturity to available for sale, Before Tax |  |  |  | 4,780
Unrealized gains on debt securities transferred from held to maturity to available for sale, Tax Effect |  |  |  | (1,364)
Unrealized gains on debt securities transferred from held to maturity to available for sale, Net of Tax |  |  |  | 3,416
Amounts reclassified from accumulated other comprehensive income, Before Tax | 143 | (10) |  |
Amounts reclassified from accumulated other comprehensive income, Tax Effect | 41 | (3) |  |
Amounts reclassified from accumulated other comprehensive income, Net of Tax | (102) | 7 |  |
Unrealized gains (losses) on cash flow hedges: |  |  |  |
Accumulated other comprehensive income (loss) ending balance period, Before Tax | 55,436 | 20,459 | 55,436 | 20,459
Accumulated other comprehensive income (loss) ending balance period, Tax Effect | (15,802) | (5,832) | (15,802) | (5,832)
Ending balance | 39,634 | 14,627 | 39,634 | $ 14,627
Unrealized gains (losses) on cash flow hedges |  |  |  |
Changes in accumulated other comprehensive income (loss) by component, net of tax |  |  |  |
Accumulated other comprehensive income (loss) beginning balance period, Before Tax | (3,424) |  | (280) |
Accumulated other comprehensive income (loss) beginning balance period, Tax Effect | 976 |  | 80 |
Beginning balance | (2,448) |  | (200) |
Unrealized gains (losses) on cash flow hedges: |  |  |  |
Unrealized holding gains (losses) on cash flow hedges, Before Tax | (14) |  | (3,143) |
Unrealized holding gains (losses) on cash flow hedges, Tax Effect | 4 |  | 896 |
Unrealized holding gains (losses) on cash flow hedges, Net of Tax | (10) |  | (2,247) |
Amounts reclassified from accumulated other comprehensive income, Before Tax | (195) |  | (210) |
Amounts reclassified from accumulated other comprehensive income, Tax Effect | 56 |  | 60 |
Amounts reclassified from accumulated other comprehensive income, Net of Tax | (139) |  | (150) |
Accumulated other comprehensive income (loss) ending balance period, Before Tax | (3,633) |  | (3,633) |
Accumulated other comprehensive income (loss) ending balance period, Tax Effect | 1,036 |  | 1,036 |
Ending balance | $ (2,597) |  | $ (2,597) |

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