CAPITAL RATIOS AND SHAREHOLDERS' EQUITY - Components of AOCI (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	$ (1,705)	$ (4,326)
Net unrealized holding gain/(loss) on AFS securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other accumulated comprehensive loss, before tax:	1,332	(3,269)
Income taxes related to items of accumulated other comprehensive loss:	(496)	1,144
Net unrealized loss on effective cash flow hedging derivatives
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other accumulated comprehensive loss, before tax:	(3,470)	(2,766)
Income taxes related to items of accumulated other comprehensive loss:	1,293	968
Net unrealized holding loss on post-retirement plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other accumulated comprehensive loss, before tax:	(580)	(622)
Income taxes related to items of accumulated other comprehensive loss:	$ 216	$ 219