ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Changes in AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	$ (1,570)
Other comprehensive income (loss), net of tax	1,759	$ (1,244)	$ (2,109)
Ending balance	189	(705)	(1,570)
Gains and Losses on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(185)	(480)	(480)
Other comprehensive gain before reclassifications	25	132
Other comprehensive income (loss), net of tax	25	132
Ending balance	(160)	(348)	(185)
Unrealized Gains and Losses on Available-for-Sale Securities
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(1,385)	3,126	3,126
Other comprehensive gain before reclassifications	1,742	(1,308)
Reclassification adjustment - gains on equity securities	0	(2,107)
Amounts reclassified from accumulated other comprehensive income (loss)	(8)	(68)
Other comprehensive income (loss), net of tax	1,734	(3,483)
Ending balance	$ 349	$ (357)	$ (1,385)