ACCUMULATED OTHER COMPREHENSIVE INCOME, RECLASSIFICATION OF AOCI (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net gains (losses) on sales of debt securities									$ (221)	$ 41	$ 8
Less provision (benefit) for income taxes	$ (1,283)	$ (928)	$ (1,128)	$ (746)	$ (1,238)	$ (961)	$ (973)	$ (941)	(4,085)	(4,113)	$ (2,949)
Reclassification adjustment, net of taxes									175	(32)
Unrealized Gains and Losses on Available-for-Sale Securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification adjustment, net of taxes									175	(32)
Unrealized Gains and Losses on Available-for-Sale Securities | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net gains (losses) on sales of debt securities									221	(41)
Less provision (benefit) for income taxes									46	(9)
Reclassification adjustment, net of taxes									$ 175	$ (32)