ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Changes in AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance			$ 2,646
Other comprehensive income (loss), net of tax	$ (337)	$ 282	(2,317)	$ 1,238	$ 1,204
Ending balance	(1,778)	2,245	(1,778)	2,245	2,646
Gains and Losses on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance			(480)	(679)	(679)
Other comprehensive gain before reclassifications			265	180
Other comprehensive income (loss), net of tax			265	180
Ending balance	(215)	(499)	(215)	(499)	(480)
Unrealized Gains and Losses on Available-for-Sale Securities
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance			3,126	1,686	1,686
Other comprehensive gain before reclassifications			(2,459)	1,263
Reclassification adjustment - gains on equity securities			(2,107)	0
Amounts reclassified from accumulated other comprehensive income (loss)			(123)	(205)
Other comprehensive income (loss), net of tax			(4,689)	1,058
Ending balance	$ (1,563)	$ 2,744	$ (1,563)	$ 2,744	$ 3,126