ACCUMULATED OTHER COMPREHENSIVE LOSS - Reclassifications from AOCL (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net realized (loss) gain on securities sales	$ (22)	$ (50)	$ 167
Tax benefit	(5,778)	(4,599)	(8,238)
Reclassification out of Accumulated Other Comprehensive Loss | Unrealized Gains and (Losses) on Securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net realized (loss) gain on securities sales	22	50	(167)
Tax benefit	(5)	(10)	59
Net of Tax	$ 17	$ 40	$ (108)