LOANS AND ALLOWANCE FOR CREDIT LOSSES Allowance for Credit Losses Activity, Unfunded Loan Commitments (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2020	Dec. 31, 2019
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at December 31, 2019	$ 8,593	$ 100
Expense for credit losses	0	500
Balance at September 30, 2020	$ 8,593	8,593	$ 100
Accounting standards update			us-gaap:AccountingStandardsUpdate201613Member
Cumulative Effect, Period of Adoption, Adjustment
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at December 31, 2019		7,993
Balance at September 30, 2020			$ 7,993
Cumulative Effect, Period of Adoption, Adjusted Balance
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at December 31, 2019		$ 8,093
Balance at September 30, 2020			$ 8,093