LOANS AND LEASES - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	$ 0
Restructured Loans, Nonaccrual Status		$ 10,000,000
Real Estate Acquired Through Foreclosure	191,000	191,000	$ 72,000	$ 98,000
Loans and Leases Receivable, Net of Deferred Income	10,433,385,000	10,298,971,000
Unused Commitments to Extend Credit	3,968,309,000	3,904,732,000
Commercial segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	13,971,000	8,242,000
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Restructured Loans, Loan Relationships, Review Threshold Amount Minimum	250,000
Loans and Leases Receivable, Net of Deferred Income	11,129,000	10,691,000
Lease financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	175,000	$ 178,000
Financial Difficulty Modification
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unused Commitments to Extend Credit	$ 0