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ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
OTHER COMPREHENSIVE INCOME (LOSS) |  |
Unrealized holding (losses) gains on available for sale securities | $ (8,587) | $ 1,616
Income tax effect | 2,499 | (606)
Net change in unrealized (losses) gains on available for sale securities | (6,088) | 1,010
Reclassification adjustment for amortization realized in income | 95 | 114
Income tax effect | (28) | (17)
Net change in post-retirement obligation | 67 | 97
Change in fair value of derivatives used for cash flow hedges | 2,827 | 25
Reclassification adjustment for losses realized in income | 65 | 275
Income tax effect | (841) | (126)
Net change in unrealized gains on cash flow hedges | 2,051 | 174
Other comprehensive (loss) income | $ (3,970) | $ 1,281

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