ALLOWANCE FOR CREDIT LOSSES AND CREDIT QUALITY INFORMATION - Schedule of Troubled Loans Disaggregated by Portfolio Segment (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($)
Financing Receivable, Modifications [Line Items]
Post Modification	$ 95,180
% of Total Loan Category	0.75%
Term Extension
Financing Receivable, Modifications [Line Items]
Post Modification	$ 71,329
More-Than-Insignificant Payment Delay
Financing Receivable, Modifications [Line Items]
Post Modification	12,676
Combination- Term Extension and Payment Delay
Financing Receivable, Modifications [Line Items]
Post Modification	10,660
Combination- Term Extension and Interest Rate Reduction
Financing Receivable, Modifications [Line Items]
Post Modification	321
Combination - Payment Delay and Interest Rate Reduction
Financing Receivable, Modifications [Line Items]
Post Modification	194
Commercial | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Post Modification	$ 60,241
% of Total Loan Category	1.90%
Commercial | Commercial and industrial | Term Extension
Financing Receivable, Modifications [Line Items]
Post Modification	$ 44,123
Commercial | Commercial and industrial | More-Than-Insignificant Payment Delay
Financing Receivable, Modifications [Line Items]
Post Modification	10,523
Commercial | Commercial and industrial | Combination- Term Extension and Payment Delay
Financing Receivable, Modifications [Line Items]
Post Modification	5,568
Commercial | Commercial and industrial | Combination- Term Extension and Interest Rate Reduction
Financing Receivable, Modifications [Line Items]
Post Modification	27
Commercial | Commercial and industrial | Combination - Payment Delay and Interest Rate Reduction
Financing Receivable, Modifications [Line Items]
Post Modification	0
Commercial | Owner-occupied commercial
Financing Receivable, Modifications [Line Items]
Post Modification	$ 204
% of Total Loan Category	0.01%
Commercial | Owner-occupied commercial | Term Extension
Financing Receivable, Modifications [Line Items]
Post Modification	$ 66
Commercial | Owner-occupied commercial | More-Than-Insignificant Payment Delay
Financing Receivable, Modifications [Line Items]
Post Modification	0
Commercial | Owner-occupied commercial | Combination- Term Extension and Payment Delay
Financing Receivable, Modifications [Line Items]
Post Modification	0
Commercial | Owner-occupied commercial | Combination- Term Extension and Interest Rate Reduction
Financing Receivable, Modifications [Line Items]
Post Modification	138
Commercial | Owner-occupied commercial | Combination - Payment Delay and Interest Rate Reduction
Financing Receivable, Modifications [Line Items]
Post Modification	0
Commercial | Commercial mortgages
Financing Receivable, Modifications [Line Items]
Post Modification	$ 9,386
% of Total Loan Category	0.25%
Commercial | Commercial mortgages | Term Extension
Financing Receivable, Modifications [Line Items]
Post Modification	$ 9,386
Commercial | Commercial mortgages | More-Than-Insignificant Payment Delay
Financing Receivable, Modifications [Line Items]
Post Modification	0
Commercial | Commercial mortgages | Combination- Term Extension and Payment Delay
Financing Receivable, Modifications [Line Items]
Post Modification	0
Commercial | Commercial mortgages | Combination- Term Extension and Interest Rate Reduction
Financing Receivable, Modifications [Line Items]
Post Modification	0
Commercial | Commercial mortgages | Combination - Payment Delay and Interest Rate Reduction
Financing Receivable, Modifications [Line Items]
Post Modification	0
Commercial | Construction
Financing Receivable, Modifications [Line Items]
Post Modification	$ 15,411
% of Total Loan Category	1.49%
Commercial | Construction | Term Extension
Financing Receivable, Modifications [Line Items]
Post Modification	$ 15,411
Commercial | Construction | More-Than-Insignificant Payment Delay
Financing Receivable, Modifications [Line Items]
Post Modification	0
Commercial | Construction | Combination- Term Extension and Payment Delay
Financing Receivable, Modifications [Line Items]
Post Modification	0
Commercial | Construction | Combination- Term Extension and Interest Rate Reduction
Financing Receivable, Modifications [Line Items]
Post Modification	0
Commercial | Construction | Combination - Payment Delay and Interest Rate Reduction
Financing Receivable, Modifications [Line Items]
Post Modification	0
Residential
Financing Receivable, Modifications [Line Items]
Post Modification	$ 777
% of Total Loan Category	0.09%
Residential | Term Extension
Financing Receivable, Modifications [Line Items]
Post Modification	$ 561
Residential | More-Than-Insignificant Payment Delay
Financing Receivable, Modifications [Line Items]
Post Modification	216
Residential | Combination- Term Extension and Payment Delay
Financing Receivable, Modifications [Line Items]
Post Modification	0
Residential | Combination- Term Extension and Interest Rate Reduction
Financing Receivable, Modifications [Line Items]
Post Modification	0
Residential | Combination - Payment Delay and Interest Rate Reduction
Financing Receivable, Modifications [Line Items]
Post Modification	0
Consumer
Financing Receivable, Modifications [Line Items]
Post Modification	$ 9,161
% of Total Loan Category	0.46%
Consumer | Term Extension
Financing Receivable, Modifications [Line Items]
Post Modification	$ 1,782
Consumer | More-Than-Insignificant Payment Delay
Financing Receivable, Modifications [Line Items]
Post Modification	1,937
Consumer | Combination- Term Extension and Payment Delay
Financing Receivable, Modifications [Line Items]
Post Modification	5,092
Consumer | Combination- Term Extension and Interest Rate Reduction
Financing Receivable, Modifications [Line Items]
Post Modification	156
Consumer | Combination - Payment Delay and Interest Rate Reduction
Financing Receivable, Modifications [Line Items]
Post Modification	$ 194