SECURITIES - Narrative (Details)	Dec. 31, 2022 USD ($) security	Oct. 31, 2022 USD ($)	Dec. 31, 2021 USD ($) security
Debt and Equity Securities, FV-NI [Line Items]
Debt securities, held-to-maturity, accumulated unrecognized loss, transferred from available-for-sale		$ 36,800,000
Accrued interest receivable	$ 6,200,000		$ 6,800,000
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Current, Statement of Financial Position [Extensible Enumeration]	Interest receivable
Debt securities, HTM, credit loss exposure	$ 242,000
Amount of reserve recorded	0		0
Debt Securities, HTM, accrued interest, after allowance for credit loss	$ 3,600,000		0
Debt Securities, Held-to-Maturity, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]	Interest receivable
Debt securities, HTM, excluding accrued interest, nonaccrual	$ 0		0
Carrying value of securities pledged to public deposits	$ 1,031,000,000.000		$ 889,500,000
Number of securities in the portfolio that were in an unrealized loss position | security	1,265		304
Debt securities, AFS, allowance for credit loss	$ 0		$ 0
Obligations of U.S. government agencies and sponsored entities
Debt and Equity Securities, FV-NI [Line Items]
Debt securities, held-to-maturity, excluding accrued interest, after allowance for credit loss, transferred from available-for-sale		863,000
Mortgage-backed securities - commercial
Debt and Equity Securities, FV-NI [Line Items]
Debt securities, held-to-maturity, excluding accrued interest, after allowance for credit loss, transferred from available-for-sale		1,200,000
Tax-exempt and taxable obligations of states and municipal subdivisions
Debt and Equity Securities, FV-NI [Line Items]
Debt securities, held-to-maturity, excluding accrued interest, after allowance for credit loss, transferred from available-for-sale		$ 137,500,000
Financial Asset, Past Due
Debt and Equity Securities, FV-NI [Line Items]
Securities HTM, excluding accrued interest, past due 30 days	$ 0