ALLOWANCE FOR CREDIT LOSSES AND CREDIT QUALITY INFORMATION - Schedule of Amortized Cost of Loans Received Term Extension Modification (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	$ 0	$ 19,176	$ 5,435	$ 34,341
Combination Term Extension & Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	301		301
Loans Modified
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	301	34,390	5,736	49,555
Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total		121		121
More-Than-Insignificant Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total		15,093		15,093
Commercial | Commercial and industrial | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0	19,176	0	34,341
Commercial | Commercial and industrial | Combination Term Extension & Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	301		301
Commercial | Commercial and industrial | Loans Modified
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	$ 301	34,173	301	49,338
Commercial | Commercial and industrial | Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total		0		0
Commercial | Commercial and industrial | More-Than-Insignificant Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total		14,997		14,997
Commercial | Commercial mortgages | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total			5,435
Commercial | Commercial mortgages | Combination Term Extension & Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total			0
Commercial | Commercial mortgages | Loans Modified
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total			$ 5,435
Residential | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total		0		0
Residential | Loans Modified
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total		121		121
Residential | Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total		121		121
Residential | More-Than-Insignificant Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total		0		0
Consumer | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total		0		0
Consumer | Loans Modified
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total		96		96
Consumer | Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total		0		0
Consumer | More-Than-Insignificant Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total		$ 96		$ 96