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CAPITAL RATIOS AND SHAREHOLDERS' EQUITY - Components of OCI (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Net unrealized gain (loss) arising during the period
Net of Tax	$ (4,341)	$ 282	$ (14,154)	$ 2,903
Less: reclassification adjustment for gains (losses) realized in net income
Net of Tax	0	12	0	12
Other comprehensive income (loss)
Before Tax	(5,551)	433	(18,419)	4,359
Tax Effect	1,210	(163)	4,265	(1,468)
Total other comprehensive (loss) income	(4,341)	270	(14,154)	2,891
Net unrealized gain (loss) on AFS securities
Net unrealized gain (loss) arising during the period
Before Tax	(5,850)	531	(19,639)	5,138
Tax Effect	1,291	(199)	4,565	(1,846)
Net of Tax	(4,559)	332	(15,074)	3,292
Less: reclassification adjustment for gains (losses) realized in net income
Before Tax	0	19	0	19
Tax Effect	0	(7)	0	(7)
Net of Tax	0	12	0	12
Other comprehensive income (loss)
Before Tax	(5,850)	512	(19,639)	5,119
Tax Effect	1,291	(192)	4,565	(1,839)
Total other comprehensive (loss) income	(4,559)	320	(15,074)	3,280
Net unrealized loss on effective cash flow hedging derivatives
Net unrealized gain (loss) arising during the period
Before Tax	299	(84)	1,179	(805)
Tax Effect	(81)	31	(290)	373
Net of Tax	218	(53)	889	(432)
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	299	(84)	1,179	(805)
Tax Effect	(81)	31	(290)	373
Total other comprehensive (loss) income	218	(53)	889	(432)
Net unrealized loss on post-retirement plans
Net unrealized gain (loss) arising during the period
Before Tax	0	5	41	45
Tax Effect	0	(2)	(10)	(2)
Net of Tax	0	3	31	43
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	5	41	45
Tax Effect	0	(2)	(10)	(2)
Total other comprehensive (loss) income	$ 0	$ 3	$ 31	$ 43

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