LOANS AND LEASES - Additional Information (Details)	3 Months Ended	6 Months Ended
	Jun. 30, 2023 USD ($)	Jun. 30, 2023 USD ($) loans	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Jun. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	$ 200,000	$ 200,000
Restructured Loans, Nonaccrual Status				$ 10,000,000
Real Estate Acquired Through Foreclosure	281,000	281,000	$ 191,000	191,000	$ 22,000	$ 72,000	$ 98,000
Loans and Leases Receivable, Net of Deferred Income	10,550,209,000	10,550,209,000		10,298,971,000
Unused Commitments to Extend Credit	3,948,027,000	$ 3,948,027,000		3,904,732,000
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | loans		1
Commercial segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	21,508,000	$ 21,508,000		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	11,697,000	11,697,000		10,691,000
Lease financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	4,833,000	4,833,000		$ 178,000
Financial Difficulty Modification
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unused Commitments to Extend Credit	$ 0	$ 0