REVENUE FROM CONTRACTS WITH CUSTOMERS (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenue from External Customer [Line Items]
In-scope other operating income	$ 7,298	$ 5,791	$ 21,182	$ 17,554
Out-of-scope other operating income	2,955	5,772	10,312	13,587
Total other operating income	10,253	11,563	31,494	31,141
Loan placement fees
Revenue from External Customer [Line Items]
In-scope other operating income	276	235	1,636	653
Service charges on deposit accounts
Revenue from External Customer [Line Items]
In-scope other operating income	1,637	1,475	4,558	4,674
Other service charges and fees
Revenue from External Customer [Line Items]
In-scope other operating income	4,093	2,932	11,196	8,517
Income from fiduciary activities
Revenue from External Customer [Line Items]
In-scope other operating income	1,292	1,149	3,792	3,716
Net loss on sales of foreclosed assets
Revenue from External Customer [Line Items]
In-scope other operating income	$ 0	$ 0	$ 0	$ (6)