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, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	$ 54,798	$ 44,279	$ 126,742	$ 79,536
% of Total Loan Category	0.42%	0.34%	0.98%	0.61%
Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	$ 30,905	$ 41,527	$ 101,305	$ 73,501
More-Than-Insignificant Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	2,515	1,390	3,666	2,344
Combination- Term Extension and Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	21,378	1,362	21,771	3,691
Commercial | Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	$ 32,174	$ 30,773	$ 33,166	$ 63,563
% of Total Loan Category	1.17%	1.17%	1.21%	2.41%
Commercial | Commercial and industrial | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	$ 14,874	$ 30,075	$ 15,801	$ 61,803
Commercial | Commercial and industrial | More-Than-Insignificant Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	2,500	606	2,565	955
Commercial | Commercial and industrial | Combination- Term Extension and Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	14,800	92	14,800	805
Commercial | Owner-occupied commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total		$ 493	$ 7,820	$ 493
% of Total Loan Category		0.03%	0.40%	0.03%
Commercial | Owner-occupied commercial | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total		$ 493	$ 6,912	$ 493
Commercial | Owner-occupied commercial | More-Than-Insignificant Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total		0	908	0
Commercial | Owner-occupied commercial | Combination- Term Extension and Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total		0	0	0
Commercial | Commercial mortgages
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	$ 22,599	$ 83	$ 59,276	$ 83
% of Total Loan Category	0.58%	0.00%	1.52%	0.00%
Commercial | Commercial mortgages | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	$ 16,029	$ 83	$ 52,706	$ 83
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	6,570	0	6,570	0
Commercial | Construction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total		$ 10,620	$ 25,884	$ 10,620
% of Total Loan Category		1.21%	3.02%	1.21%
Commercial | Construction | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total		$ 10,620	$ 25,884	$ 10,620
Commercial | Construction | More-Than-Insignificant Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total		0	0	0
Commercial | Construction | Combination- Term Extension and Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total		0	0	0
Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	$ 25	$ 2,310	$ 596	$ 4,777
% of Total Loan Category	0.00%	0.11%	0.03%	0.23%
Consumer | Discontinued Operations, Held-for-Sale
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	$ 1,300		$ 2,300
Consumer | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	2	$ 256	2	$ 502
Consumer | More-Than-Insignificant Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	15	784	193	1,389
Consumer | Combination- Term Extension and Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	$ 8	$ 1,270	$ 401	$ 2,886