INVESTMENT SECURITIES - Narrative (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2023 USD ($) security	Jun. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)	Sep. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)
Debt Securities, Available-for-sale [Line Items]
Allowance for credit loss | $	$ 80	$ 82	$ 75	$ 79	$ 88	$ 0
Unrealized losses | $	78,069		59,134
Expected credit losses | $	0
Debt securities, held-to-maturity, allowance for credit loss | $	$ 0		0
Debt Securities
Debt Securities, Available-for-sale [Line Items]
Number of securities in portfolio | security	419
Number of securities in unrealized loss position | security	412
Number of securities in portfolio | security	27
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises
Debt Securities, Available-for-sale [Line Items]
Number of securities in unrealized loss position | security	320
Number of securities in unrealized loss position | security	21
SBA pool securities
Debt Securities, Available-for-sale [Line Items]
Number of securities in unrealized loss position | security	30
Allowance for credit loss | $	$ 0		0
Unrealized losses | $	$ 2,085		2,027
State, County And Municipal Securities
Debt Securities, Available-for-sale [Line Items]
Number of securities in unrealized loss position | security	27
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Number of securities in unrealized loss position | security	6
Allowance for credit loss | $	$ 80		75
Unrealized losses | $	$ 1,055		396
U.S. government sponsored agency security
Debt Securities, Available-for-sale [Line Items]
Number of securities in unrealized loss position | security	1
State, county and municipal securities
Debt Securities, Available-for-sale [Line Items]
Number of securities in unrealized loss position | security	28
Number of securities in unrealized loss position | security	6
Allowance for credit loss | $	$ 0		0
Unrealized losses | $	1,789		1,180
Collateral Pledged
Debt Securities, Available-for-sale [Line Items]
Pledged securities, carrying value | $	$ 827,900		$ 861,600