ALLOWANCE FOR CREDIT LOSSES AND CREDIT QUALITY INFORMATION - Schedule of Troubled Loans Disaggregated by Portfolio Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	$ 44,279	$ 35,752	$ 79,536	$ 51,129
% of Total Loan Category	0.34%	0.29%	0.61%	0.41%
Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	$ 41,527	$ 21,764	$ 73,501	$ 35,191
More-Than-Insignificant Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	1,390	720	2,344	871
Combination- Term Extension and Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	1,362	13,193	3,691	14,570
Combination- Term Extension and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total		0		302
Combination - Payment Delay and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total		75		195
Commercial | Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	$ 30,773	$ 18,983	$ 63,563	$ 31,694
% of Total Loan Category	1.17%	0.72%	2.41%	1.21%
Commercial | Commercial and industrial | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	$ 30,075	$ 8,819	$ 61,803	$ 21,530
Commercial | Commercial and industrial | More-Than-Insignificant Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	606	0	955	0
Commercial | Commercial and industrial | Combination- Term Extension and Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	92	10,164	805	10,164
Commercial | Commercial and industrial | Combination- Term Extension and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total		0		0
Commercial | Commercial and industrial | Combination - Payment Delay and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total		0		0
Commercial | Owner-occupied commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	$ 493	$ 1,062	$ 493	$ 1,206
% of Total Loan Category	0.03%	0.06%	0.03%	0.06%
Commercial | Owner-occupied commercial | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	$ 493	$ 0	$ 493	$ 0
Commercial | Owner-occupied commercial | More-Than-Insignificant Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0	0	0	0
Commercial | Owner-occupied commercial | Combination- Term Extension and Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0	1,062	0	1,062
Commercial | Owner-occupied commercial | Combination- Term Extension and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total		0		144
Commercial | Owner-occupied commercial | Combination - Payment Delay and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total		0		0
Commercial | Commercial mortgages
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	$ 83	$ 9,468	$ 83	$ 9,468
% of Total Loan Category	0.00%	0.27%	0.00%	0.27%
Commercial | Commercial mortgages | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	$ 83	$ 9,468	$ 83	$ 9,468
Commercial | Commercial mortgages | More-Than-Insignificant Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0	0	0	0
Commercial | Commercial mortgages | Combination- Term Extension and Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0	0	0	0
Commercial | Commercial mortgages | Combination- Term Extension and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total		0		0
Commercial | Commercial mortgages | Combination - Payment Delay and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total		0		0
Commercial | Construction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	$ 10,620	$ 3,305	$ 10,620	$ 3,305
% of Total Loan Category	1.21%	0.35%	1.21%	0.35%
Commercial | Construction | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	$ 10,620	$ 3,305	$ 10,620	$ 3,305
Commercial | Construction | More-Than-Insignificant Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0	0	0	0
Commercial | Construction | Combination- Term Extension and Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0	0	0	0
Commercial | Construction | Combination- Term Extension and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total		0		0
Commercial | Construction | Combination - Payment Delay and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total		0		0
Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	$ 2,310	$ 2,934	$ 4,777	$ 5,456
% of Total Loan Category	0.11%	0.15%	0.23%	0.29%
Consumer | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	$ 256	$ 172	$ 502	$ 888
Consumer | More-Than-Insignificant Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	784	720	1,389	871
Consumer | Combination- Term Extension and Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	$ 1,270	1,967	$ 2,886	3,344
Consumer | Combination- Term Extension and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total		0		158
Consumer | Combination - Payment Delay and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total		$ 75		$ 195