CAPITAL RATIOS AND SHAREHOLDERS' EQUITY - Components of AOCI (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss)	$ 6,190	$ 3,911
Net unrealized gain on AFS securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other accumulated comprehensive income (loss), before tax:	12,699	7,342
Income taxes related to items of accumulated other comprehensive (income) loss:	(3,139)	(1,793)
Net unrealized loss on effective hedging derivatives
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other accumulated comprehensive income (loss), before tax:	(3,099)	(718)
Income taxes related to items of accumulated other comprehensive (income) loss:	886	237
Net unrealized loss on post retirement
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other accumulated comprehensive income (loss), before tax:	(1,512)	(1,512)
Income taxes related to items of accumulated other comprehensive (income) loss:	$ 355	$ 355