PORTFOLIO LOANS - Schedule of financial instruments owned and pledged as collateral (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Financial Instruments Owned and Pledged as Collateral [Line Items]
Portfolio loans, net	$ 7,634,094	$ 7,101,111
Asset Pledged as Collateral
Financial Instruments Owned and Pledged as Collateral [Line Items]
Portfolio loans, net	5,900,166	5,464,585
FHLB
Financial Instruments Owned and Pledged as Collateral [Line Items]
Portfolio loans, net	5,095,448	4,656,331
Federal Reserve Bank
Financial Instruments Owned and Pledged as Collateral [Line Items]
Portfolio loans, net	$ 804,718	$ 808,254