ALLOWANCE FOR CREDIT LOSSES AND CREDIT QUALITY INFORMATION - Analysis of Collateral Dependent and Impaired Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Property
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized cost basis of nonaccruing collateral-dependent loans	$ 101,477	$ 62,026
Equipment and other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized cost basis of nonaccruing collateral-dependent loans	20,704	1,983
Commercial | Commercial and industrial | Property
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized cost basis of nonaccruing collateral-dependent loans	41,105	17,230
Commercial | Commercial and industrial | Equipment and other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized cost basis of nonaccruing collateral-dependent loans	20,704	1,983
Commercial | Owner-occupied commercial | Property
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized cost basis of nonaccruing collateral-dependent loans	4,710	4,862
Commercial | Owner-occupied commercial | Equipment and other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized cost basis of nonaccruing collateral-dependent loans	0	0
Commercial | Commercial mortgages | Property
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized cost basis of nonaccruing collateral-dependent loans	22,223	22,292
Commercial | Commercial mortgages | Equipment and other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized cost basis of nonaccruing collateral-dependent loans	0	0
Commercial | Construction | Property
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized cost basis of nonaccruing collateral-dependent loans	25,600	12,617
Commercial | Construction | Equipment and other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized cost basis of nonaccruing collateral-dependent loans	0	0
Residential | Property
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized cost basis of nonaccruing collateral-dependent loans	5,011	2,579
Residential | Equipment and other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized cost basis of nonaccruing collateral-dependent loans	0	0
Consumer | Property
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized cost basis of nonaccruing collateral-dependent loans	2,828	2,446
Consumer | Equipment and other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized cost basis of nonaccruing collateral-dependent loans	$ 0	$ 0