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CAPITAL RATIOS AND SHAREHOLDERS' EQUITY - Components of OCI (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2019
Net unrealized gain (loss) arising during the period |  |  |  |  |  |  |
Before Tax |  |  |  |  | $ (1,118) |  | $ 1,768
Net of Tax | $ 884 | $ 2,288 |  |  | 6,625 | $ 14,967 |
Less: reclassification adjustment for gains (losses) realized in net income |  |  |  |  |  |  |
Before Tax |  |  |  |  |  |  | $ 3,156
Net of Tax | 0 | 120 |  |  | 1,131 | 120 |
Other comprehensive income (loss) |  |  |  |  |  |  |
Before Tax | 1,156 | 2,830 |  |  | 7,089 | 19,374 |
Tax Effect | (272) | (662) |  |  | (1,595) | (4,527) |
Total other comprehensive income | 884 | 2,168 | $ 4,610 | $ 12,679 | 5,494 | 14,847 |
Net unrealized gain (loss) on AFS securities |  |  |  |  |  |  |
Net unrealized gain (loss) arising during the period |  |  |  |  |  |  |
Before Tax | 351 | 3,357 |  |  | 9,408 | 21,903 |
Tax Effect | (82) | (784) |  |  | (2,146) | (5,118) |
Net of Tax | 269 | 2,573 |  |  | 7,262 | 16,785 |
Less: reclassification adjustment for gains (losses) realized in net income |  |  |  |  |  |  |
Before Tax |  | 157 |  |  | 1,486 | 157 |
Tax Effect |  | (37) |  |  | (355) | (37) |
Net of Tax | 0 | 120 |  |  | 1,131 | 120 |
Other comprehensive income (loss) |  |  |  |  |  |  |
Before Tax | 351 | 3,200 |  |  | 7,922 | 21,746 |
Tax Effect | (82) | (747) |  |  | (1,791) | (5,081) |
Total other comprehensive income | 269 | 2,453 |  |  | 6,131 | 16,665 |
Net unrealized gain (loss) on effective cash flow hedging derivatives |  |  |  |  |  |  |
Net unrealized gain (loss) arising during the period |  |  |  |  |  |  |
Before Tax | 805 | (370) |  |  | (833) | (2,372) |
Tax Effect | (190) | 85 |  |  | 196 | 554 |
Net of Tax | 615 | (285) |  |  | (637) | (1,818) |
Less: reclassification adjustment for gains (losses) realized in net income |  |  |  |  |  |  |
Net of Tax | 0 | 0 |  |  | 0 | 0 |
Other comprehensive income (loss) |  |  |  |  |  |  |
Before Tax | 805 | (370) |  |  | (833) | (2,372) |
Tax Effect | (190) | 85 |  |  | 196 | 554 |
Total other comprehensive income | 615 | (285) |  |  | (637) | (1,818) |
Net unrealized gain (loss) on post-retirement plans |  |  |  |  |  |  |
Net unrealized gain (loss) arising during the period |  |  |  |  |  |  |
Net of Tax | 0 | 0 |  |  | 0 | 0 |
Less: reclassification adjustment for gains (losses) realized in net income |  |  |  |  |  |  |
Net of Tax | 0 | 0 |  |  | 0 | 0 |
Other comprehensive income (loss) |  |  |  |  |  |  |
Total other comprehensive income | $ 0 | $ 0 |  |  | $ 0 | $ 0 |

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