LOANS AND ALLOWANCE FOR LOAN LOSSES - Related Party Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Loans and Leases Receivable, Related Parties [Roll Forward]
Balance, January 1	$ 36,468	$ 3,072
Advances	34,132	8,938
Repayments	(1,205)	(2,554)
Transactions due to changes in related parties	0	27,012
Ending balance	$ 69,395	$ 36,468