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CAPITAL RATIOS AND SHAREHOLDERS' EQUITY - Components of OCI (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
Net unrealized gain (loss) arising during the period |  |
Net of Tax | $ (7,622) | $ 664
Less: reclassification adjustment for gains (losses) realized in net income |  |
Net of Tax |  | 0
Other comprehensive income (loss) |  |
Before Tax | (10,007) | 950
Tax Effect | 2,385 | (286)
Total other comprehensive (loss) income | (7,622) | 664
Net unrealized loss on AFS securities |  |
Net unrealized gain (loss) arising during the period |  |
Before Tax | (10,702) | 1,116
Tax Effect | 2,550 | (348)
Net of Tax | (8,152) | 768
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 | (10,702) | 1,116
Tax Effect | 2,550 | (348)
Total other comprehensive (loss) income | (8,152) | 768
Net unrealized loss on effective cash flow hedging derivatives |  |
Net unrealized gain (loss) arising during the period |  |
Before Tax | 654 | (223)
Tax Effect | (155) | 83
Net of Tax | 499 | (140)
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 | 654 | (223)
Tax Effect | (155) | 83
Total other comprehensive (loss) income | 499 | (140)
Net unrealized loss on post-retirement plans |  |
Net unrealized gain (loss) arising during the period |  |
Before Tax | 41 | 57
Tax Effect | (10) | (21)
Net of Tax | 31 | 36
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 | 41 | 57
Tax Effect | (10) | (21)
Total other comprehensive (loss) income | $ 31 | $ 36

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