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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
--- | --- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Net unrealized gain (loss) arising during the period |  |  |  |  |  |
Net of Tax | $ 2,288 | $ (4,341) |  |  | $ 14,967 | $ (14,154)
Less: reclassification adjustment for gains (losses) realized in net income |  |  |  |  |  |
Net of Tax | 120 | 0 |  |  | 120 | 0
Other comprehensive income (loss) |  |  |  |  |  |
Before Tax | 2,830 | (5,551) |  |  | 19,374 | (18,419)
Tax Effect | (662) | 1,210 |  |  | (4,527) | 4,265
Total other comprehensive income (loss) | 2,168 | (4,341) | $ 12,679 | $ (9,813) | 14,847 | (14,154)
Net unrealized (loss) gain on AFS Securities |  |  |  |  |  |
Net unrealized gain (loss) arising during the period |  |  |  |  |  |
Before Tax | 3,357 | (5,850) |  |  | 21,903 | (19,639)
Tax Effect | (784) | 1,291 |  |  | (5,118) | 4,565
Net of Tax | 2,573 | (4,559) |  |  | 16,785 | (15,074)
Less: reclassification adjustment for gains (losses) realized in net income |  |  |  |  |  |
Before Tax | 157 | 0 |  |  | 157 | 0
Tax Effect | (37) | 0 |  |  | (37) | 0
Net of Tax | 120 | 0 |  |  | 120 | 0
Other comprehensive income (loss) |  |  |  |  |  |
Before Tax | 3,200 | (5,850) |  |  | 21,746 | (19,639)
Tax Effect | (747) | 1,291 |  |  | (5,081) | 4,565
Total other comprehensive income (loss) | 2,453 | (4,559) |  |  | 16,665 | (15,074)
Net unrealized loss on cash flow hedging derivatives |  |  |  |  |  |
Net unrealized gain (loss) arising during the period |  |  |  |  |  |
Before Tax | (370) |  |  |  | (2,372) |
Tax Effect | 85 |  |  |  | 554 |
Net of Tax | (285) |  |  |  | (1,818) |
Less: reclassification adjustment for gains (losses) realized in net income |  |  |  |  |  |
Before Tax | 0 |  |  |  | 0 |
Tax Effect | 0 |  |  |  | 0 |
Net of Tax | 0 |  |  |  | 0 |
Other comprehensive income (loss) |  |  |  |  |  |
Before Tax | (370) |  |  |  | (2,372) |
Tax Effect | 85 |  |  |  | 554 |
Total other comprehensive income (loss) | (285) |  |  |  | (1,818) |
Net unrealized gain on post-retirement plans |  |  |  |  |  |
Net unrealized gain (loss) arising during the period |  |  |  |  |  |
Before Tax | 0 | 0 |  |  | 0 | 41
Tax Effect | 0 | 0 |  |  | 0 | (10)
Net of Tax | 0 | 0 |  |  | 0 | 31
Less: reclassification adjustment for gains (losses) realized in net income |  |  |  |  |  |
Before Tax | 0 | 0 |  |  | 0 | 0
Tax Effect | 0 | 0 |  |  | 0 | 0
Net of Tax | 0 | 0 |  |  | 0 | 0
Other comprehensive income (loss) |  |  |  |  |  |
Before Tax | 0 | 0 |  |  | 0 | 41
Tax Effect | 0 | 0 |  |  | 0 | (10)
Total other comprehensive income (loss) | $ 0 | 0 |  |  | $ 0 | 31
Net unrealized gain on cash flow hedging derivatives |  |  |  |  |  |
Net unrealized gain (loss) arising during the period |  |  |  |  |  |
Before Tax |  | 299 |  |  |  | 1,179
Tax Effect |  | (81) |  |  |  | (290)
Net of Tax |  | 218 |  |  |  | 889
Less: reclassification adjustment for gains (losses) realized in net income |  |  |  |  |  |
Before Tax |  | 0 |  |  |  | 0
Tax Effect |  | 0 |  |  |  | 0
Net of Tax |  | 0 |  |  |  | 0
Other comprehensive income (loss) |  |  |  |  |  |
Before Tax |  | 299 |  |  |  | 1,179
Tax Effect |  | (81) |  |  |  | (290)
Total other comprehensive income (loss) |  | $ 218 |  |  |  | $ 889

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