LOANS AND ALLOWANCE FOR CREDIT LOSSES - Financing Receivable, Troubled Debt Restructuring (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Troubled Debt Restructuring Loans Interest Only	$ 1,768
Troubled Debt Restructuring Loans Modified Term	21
Troubled Debt Restructuring Loans Modified Combination		$ 178
Troubled Debt Restructurings Total New Modifications	1,789	178
Consumer
Troubled Debt Restructuring Loans Modified Term	21
Troubled Debt Restructuring Loans Modified Combination		48
Troubled Debt Restructurings Total New Modifications	21	48
Commercial Real Estate
Troubled Debt Restructuring Loans Interest Only	1,768
Troubled Debt Restructurings Total New Modifications	$ 1,768
One- to four-family residential
Troubled Debt Restructuring Loans Modified Combination		130
Troubled Debt Restructurings Total New Modifications		$ 130