LOANS - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, accrued interest, before allowance for credit loss	$ 15,300		$ 15,300
Accrued interest receivable for LHFI totaled with no related ACL					$ 16,400
Amortized cost, PCD loans	6,200		6,200		8,600
PCD loans, estimated ACL	584		584		855
Total	21,144		21,144		24,200
Additional amount committed on TDR loans	0		0
TDRs allowance for loan losses					4,300
Period increase (decrease) in allowance			0	$ 21
Loans charged-off	426	$ 888	657	5,011
Total loans, other financial institutions	148,600		148,600		118,400
Loans sold to other financial institutions.	62,400		62,400		77,800
Loans purchased	86,200		$ 86,200		40,600
LGD Rate			15.00%
Threshold default percentage			1.00%
Provision for credit loss	450	0	$ 450	0
Recoveries	756	$ 682	1,865	1,251
PPP Loans	$ 6,300		6,300		$ 41,100
Trouble debt restructuring
Financing Receivable, Recorded Investment [Line Items]
Period increase (decrease) in allowance			1,500	238
Loans charged-off			$ 0	$ 0