ALLOWANCE FOR CREDIT LOSSES AND CREDIT QUALITY INFORMATION - Schedule of Performance of Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024	Sep. 30, 2024
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	$ 146,457		$ 166,754
Nonaccrual Loans With No Allowance	35,042	$ 103,578
30-89 Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	6,571		908
90+ Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0		382
Accruing Current Balances
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	107,494		120,852
Nonaccrual Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	32,392		44,612
Commercial | Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	35,460		107,531
Nonaccrual Loans With No Allowance	14,842	43,206
Commercial | Commercial and industrial | Discontinued Operations, Held-for-Sale
Financing Receivable, Troubled Debt Restructuring [Line Items]
Nonaccrual Loans With No Allowance	10,300
Commercial | Commercial and industrial | 30-89 Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0		0
Commercial | Commercial and industrial | 90+ Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0		0
Commercial | Commercial and industrial | Accruing Current Balances
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	32,097		63,410
Commercial | Commercial and industrial | Nonaccrual Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	3,363		44,121
Commercial | Owner-occupied commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	4,360
Nonaccrual Loans With No Allowance	6,502	4,710
Commercial | Owner-occupied commercial | 30-89 Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0
Commercial | Owner-occupied commercial | 90+ Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0
Commercial | Owner-occupied commercial | Accruing Current Balances
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	2,197
Commercial | Owner-occupied commercial | Nonaccrual Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	2,163
Commercial | Commercial mortgages
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	57,499		30,001
Nonaccrual Loans With No Allowance	3,145	22,223
Commercial | Commercial mortgages | 30-89 Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	6,570		0
Commercial | Commercial mortgages | 90+ Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0		0
Commercial | Commercial mortgages | Accruing Current Balances
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	50,929		30,001
Commercial | Commercial mortgages | Nonaccrual Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0		0
Commercial | Construction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	48,115		21,294
Nonaccrual Loans With No Allowance	2,621	25,600
Commercial | Construction | 30-89 Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0		0
Commercial | Construction | 90+ Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0		0
Commercial | Construction | Accruing Current Balances
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	21,355		21,294
Commercial | Construction | Nonaccrual Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	26,760		0
Residential
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total			309
Nonaccrual Loans With No Allowance	4,892	5,011
Residential | 30-89 Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total			0
Residential | 90+ Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total			0
Residential | Accruing Current Balances
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total			0
Residential | Nonaccrual Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total			309
Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	1,023		7,619
Nonaccrual Loans With No Allowance	3,040	$ 2,828
Consumer | 30-89 Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	1		908
Consumer | 90+ Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0		382
Consumer | Accruing Current Balances
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	916		6,147
Consumer | Nonaccrual Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	$ 106		$ 182