LOANS - Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Recorded Investment
With no related allowance recorded	$ 5,967		$ 5,129
With an allowance recorded	901		2,509
Total	6,868		7,638
Unpaid Principal Balance
With no related allowance recorded	7,086		5,533
With an allowance recorded	898		2,484
Total	7,984		8,017
Related Allowance	25		815
Average Recorded Investment
With no related allowance recorded	5,329	$ 4,708
With an allowance recorded	2,105	929
Total	7,434	5,637
Interest Income
With no related allowance recorded	27	39
With an allowance recorded	11	12
Total	38	51
Cash Basis Interest
With no related allowance recorded	22	3
With an allowance recorded	0	0
Total	22	3
Multifamily residential
Recorded Investment
With no related allowance recorded	537		541
Total	537		541
Unpaid Principal Balance
With no related allowance recorded	614		618
Total	614		618
Related Allowance	0		0
Average Recorded Investment
With no related allowance recorded	539	560
Total	539	560
Interest Income
With no related allowance recorded	8	3
Total	8	3
Cash Basis Interest
With no related allowance recorded	8	3
Total	8	3
Single family residential
Recorded Investment
With no related allowance recorded	5,430		4,588
With an allowance recorded	901		2,509
Total	6,331		7,097
Unpaid Principal Balance
With no related allowance recorded	6,472		4,915
With an allowance recorded	898		2,484
Total	7,370		7,399
Related Allowance	25		$ 815
Average Recorded Investment
With no related allowance recorded	4,790	4,148
With an allowance recorded	2,105	929
Total	6,895	5,077
Interest Income
With no related allowance recorded	19	36
With an allowance recorded	11	12
Total	30	48
Cash Basis Interest
With no related allowance recorded	14	0
With an allowance recorded	0	0
Total	14	0
Commercial real estate
Average Recorded Investment
With no related allowance recorded	0	0
Total	0	0
Interest Income
With no related allowance recorded	0	0
Total	0	0
Cash Basis Interest
With no related allowance recorded	0	0
Total	$ 0	$ 0