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SHAREHOLDERS’ EQUITY AND EARNINGS PER COMMON SHARE - Components of OCI (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net unrealized gain (loss) arising during the period
Net of Tax	$ (6,998)	$ (229)	$ (5,049)
Less: reclassification adjustment for gains (losses) realized in net income
Net of Tax	(730)	(1)	2,906
Other comprehensive income (loss)
Before Tax	(8,125)	(638)	(12,241)
Tax Effect	1,857	410	4,286
Total other comprehensive loss	(6,268)	(228)	(7,955)
Net unrealized loss on AFS securities
Net unrealized gain (loss) arising during the period
Before Tax	(9,487)	545	(7,561)
Tax Effect	2,194	(121)	2,647
Net of Tax	(7,293)	424	(4,914)
Less: reclassification adjustment for gains (losses) realized in net income
Before Tax	(924)	19	4,498
Tax Effect	216	(7)	(1,574)
Net of Tax	(708)	12	2,924
Other comprehensive income (loss)
Before Tax	(8,563)	526	(12,059)
Tax Effect	1,978	(114)	4,221
Total other comprehensive loss	(6,585)	412	(7,838)
Net unrealized loss on derivative hedges
Net unrealized gain (loss) arising during the period
Before Tax	654	(838)	(272)
Tax Effect	(168)	386	95
Net of Tax	486	(452)	(177)
Less: reclassification adjustment for gains (losses) realized in net income
Before Tax	0	0	0
Tax Effect	0	0	0
Net of Tax	0	0	0
Other comprehensive income (loss)
Before Tax	654	(838)	(272)
Tax Effect	(168)	386	95
Total other comprehensive loss	486	(452)	(177)
Net unrealized loss on post-retirement plans
Net unrealized gain (loss) arising during the period
Before Tax	(245)	(347)	62
Tax Effect	54	146	(20)
Net of Tax	(191)	(201)	42
Less: reclassification adjustment for gains (losses) realized in net income
Before Tax	(29)	(21)	(28)
Tax Effect	7	8	10
Net of Tax	(22)	(13)	(18)
Other comprehensive income (loss)
Before Tax	(216)	(326)	90
Tax Effect	47	138	(30)
Total other comprehensive loss	$ (169)	$ (188)	$ 60

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