OTHER COMPREHENSIVE (LOSS) INCOME - Summary of the Tax Effects (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Securities available-for-sale, Before Tax Amount
Change in unrealized gain/loss during period	$ (3,307)	$ (2,369)	$ 4,687
Reclassification adjustment for net gains included in net income	(20)	(1,243)	(128)
Securities available-for-sale, Tax Effect
Change in unrealized gain/loss during period	1,158	829	(1,641)
Reclassification adjustment for net gains included in net income	7	435	45
Securities available-for-sale, Net of Tax Amount
Change in unrealized gain/loss during period	(2,149)	(1,540)	3,046
Reclassification adjustment for net gains included in net income	(13)	(808)	(83)
Cash flow hedge derivatives, Before Tax Amount
Change in fair value of derivative instruments designated as cash flow hedges during the year	989	0	0
Cash flow hedge derivatives, Tax Effect
Change in fair value of derivative instruments designated as cash flow hedges	(346)	0	0
Cash Flow Hedge Derivatives, Net of Tax
Change in fair value of derivative instruments designated as cash flow hedges	643	0	0
Total other comprehensive (loss) income, before tax	(2,338)	(3,612)	4,559
Total other comprehensive (loss) income	819	1,264	(1,596)
Total other comprehensive (loss) income, net of tax	$ (1,519)	$ (2,348)	$ 2,963