ALLOWANCE FOR CREDIT LOSSES AND CREDIT QUALITY INFORMATION - Schedule of Troubled Loans Disaggregated by Portfolio Segment (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2023 USD ($)
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	$ 78,186
% of Total Loan Category	0.62%
Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	$ 56,969
More-Than-Insignificant Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	3,947
Combination- Term Extension and Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	16,379
Combination- Term Extension and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	397
Combination - Payment Delay and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	494
Commercial | Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	$ 48,070
% of Total Loan Category	1.48%
Commercial | Commercial and industrial | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	$ 36,683
Commercial | Commercial and industrial | More-Than-Insignificant Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	1,193
Commercial | Commercial and industrial | Combination- Term Extension and Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	10,163
Commercial | Commercial and industrial | Combination- Term Extension and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	31
Commercial | Commercial and industrial | Combination - Payment Delay and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0
Commercial | Owner-occupied commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	$ 1,271
% of Total Loan Category	0.07%
Commercial | Owner-occupied commercial | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	$ 0
Commercial | Owner-occupied commercial | More-Than-Insignificant Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0
Commercial | Owner-occupied commercial | Combination- Term Extension and Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	1,062
Commercial | Owner-occupied commercial | Combination- Term Extension and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	209
Commercial | Owner-occupied commercial | Combination - Payment Delay and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0
Commercial | Commercial mortgages
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	$ 9,427
% of Total Loan Category	0.26%
Commercial | Commercial mortgages | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	$ 9,427
Commercial | Commercial mortgages | More-Than-Insignificant Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0
Commercial | Commercial mortgages | Combination- Term Extension and Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0
Commercial | Commercial mortgages | Combination- Term Extension and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0
Commercial | Commercial mortgages | Combination - Payment Delay and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0
Commercial | Construction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	$ 9,194
% of Total Loan Category	0.88%
Commercial | Construction | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	$ 9,194
Commercial | Construction | More-Than-Insignificant Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0
Commercial | Construction | Combination- Term Extension and Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0
Commercial | Construction | Combination- Term Extension and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0
Commercial | Construction | Combination - Payment Delay and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0
Residential
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	$ 613
% of Total Loan Category	0.07%
Residential | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	$ 563
Residential | More-Than-Insignificant Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	50
Residential | Combination- Term Extension and Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0
Residential | Combination- Term Extension and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0
Residential | Combination - Payment Delay and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0
Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	$ 9,611
% of Total Loan Category	0.49%
Consumer | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	$ 1,102
Consumer | More-Than-Insignificant Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	2,704
Consumer | Combination- Term Extension and Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	5,154
Consumer | Combination- Term Extension and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	157
Consumer | Combination - Payment Delay and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	$ 494