LOAN SERVICING RIGHTS - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Residential Mortgage Loans
Contractually Specified Servicing Fees, Late Fees, and Ancillary Fees Earned in Exchange for Servicing Financial Assets [Line Items]
Servicing fee income	$ 8,300	$ 5,900	$ 21,400	$ 7,700
SBA servicing rights
Contractually Specified Servicing Fees, Late Fees, and Ancillary Fees Earned in Exchange for Servicing Financial Assets [Line Items]
Servicing fee income	1,100	1,200	3,300	2,400
Indirect automobile
Contractually Specified Servicing Fees, Late Fees, and Ancillary Fees Earned in Exchange for Servicing Financial Assets [Line Items]
Servicing fee income	$ 259	$ 1,100	$ 1,500	$ 1,100