FAIR VALUE DISCLOSURES AND REPORTING, THE FAIR VALUE OPTION AND FAIR VALUE MEASUREMENTS - Reconciliation of Activity for Assets Measured at Fair Value based on Significant Unobservable (Non-market) Information (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Bank-Issued Trust Preferred Securities
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Balance, January 1	$ 31	$ 43
Paydowns	0	(11)
Balance at June 30	31	32
Municipal securities
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Balance, January 1	15,117	20,123
Purchases	0	0
Maturities, calls and paydowns	(236)	(236)
Transfer from level 2 to level 3	6,085	0
Unrealized gain (loss) included in comprehensive income	55	(1,630)
Balance at June 30	$ 21,021	$ 18,257