FAIR VALUE MEASUREMENTS - Fair value measurement on non-recurring basis (Details) - Fair Value, Measurements, Nonrecurring [Member] - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Total	$ 9,474	$ 9,013
Impaired Loans [Member]
Total	5,941	7,257
Assets held for sale [Member]
Total		668
Foreclosed Real Estate [Member]
Total	3,533	1,088
Fair Value, Inputs, Level 1 [Member]
Total	0	0
Fair Value, Inputs, Level 1 [Member] | Impaired Loans [Member]
Total	0	0
Fair Value, Inputs, Level 1 [Member] | Assets held for sale [Member]
Total		0
Fair Value, Inputs, Level 1 [Member] | Foreclosed Real Estate [Member]
Total	0	0
Fair Value, Inputs, Level 2 [Member]
Total	0	0
Fair Value, Inputs, Level 2 [Member] | Impaired Loans [Member]
Total	0	0
Fair Value, Inputs, Level 2 [Member] | Assets held for sale [Member]
Total		0
Fair Value, Inputs, Level 2 [Member] | Foreclosed Real Estate [Member]
Total	0	0
Fair Value, Inputs, Level 3 [Member]
Total	9,474	9,013
Fair Value, Inputs, Level 3 [Member] | Impaired Loans [Member]
Total	5,941	7,257
Fair Value, Inputs, Level 3 [Member] | Assets held for sale [Member]
Total		668
Fair Value, Inputs, Level 3 [Member] | Foreclosed Real Estate [Member]
Total	$ 3,533	$ 1,088