PORTFOLIO LOANS - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net deferred loan origination costs	$ 13,500,000	$ 14,000,000
Net accretable purchase accounting adjustments	(4,500,000)	(5,900,000)
Gross interest income that would have been recorded if impaired loans had been current	1,100,000	1,200,000	$ 1,600,000
Amount of interest collected and recognized on a cash basis	400,000	400,000	400,000
Amortized cost of modified loans with subsequent defaults	0	0	0
Collateral dependent loans secured by real estate or business assets	6,100,000	14,000,000
Retail real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans purchased	0	0	$ 32,200,000
Maximum | Total commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Limit where loans are processed through an expedited underwriting process	1,000,000
Watch | Total commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Limit above which loans are annually reviewed	1,000,000
Special Mention | Total commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Limit above which loans are annually reviewed	350,000
PPP Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized cost of the loans outstanding	$ 300,000	$ 800,000