LOANS AND ALLOWANCE FOR CREDIT LOSSES - Modifications (Details) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2023 USD ($)	Jun. 30, 2023 USD ($)
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	$ 1,920	$ 2,195
Commercial Mortgages
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	$ 1,920	$ 2,195
% of Loan Class	0.21%	0.24%
Weighted-average interest rate reduction (%)		0.00%
Weighted-average term extension (in months)		60 months
Principal Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	$ 0	$ 0
Principal Reduction | Commercial Mortgages
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	0	0
Principal Reduction	0	0
Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	0	0
Interest Rate Reduction | Commercial Mortgages
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	0	0
Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	0	275
Term Extension | Commercial Mortgages
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	0	275
Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	1,920	1,920
Payment Delay | Commercial Mortgages
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	1,920	1,920
Combination
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	0	0
Combination | Commercial Mortgages
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	$ 0	$ 0