SHORT-TERM BORROWINGS - Remaining contractual maturity of repurchase agreements (Details) $ in Thousands	Dec. 31, 2023 USD ($)
Repurchase agreements and repurchase-to-maturity transactions:
Remaining Contractual Maturity of the Agreements	$ 19,708
U.S. Treasury and/or agency securities
Repurchase agreements and repurchase-to-maturity transactions:
Remaining Contractual Maturity of the Agreements	19,708
Overnight and Continuous
Repurchase agreements and repurchase-to-maturity transactions:
Remaining Contractual Maturity of the Agreements	19,708
Overnight and Continuous | U.S. Treasury and/or agency securities
Repurchase agreements and repurchase-to-maturity transactions:
Remaining Contractual Maturity of the Agreements	19,708
Up to 30 days
Repurchase agreements and repurchase-to-maturity transactions:
Remaining Contractual Maturity of the Agreements	0
Up to 30 days | U.S. Treasury and/or agency securities
Repurchase agreements and repurchase-to-maturity transactions:
Remaining Contractual Maturity of the Agreements	0
30 - 90 Days
Repurchase agreements and repurchase-to-maturity transactions:
Remaining Contractual Maturity of the Agreements	0
30 - 90 Days | U.S. Treasury and/or agency securities
Repurchase agreements and repurchase-to-maturity transactions:
Remaining Contractual Maturity of the Agreements	0
Greater than 90 Days
Repurchase agreements and repurchase-to-maturity transactions:
Remaining Contractual Maturity of the Agreements	0
Greater than 90 Days | U.S. Treasury and/or agency securities
Repurchase agreements and repurchase-to-maturity transactions:
Remaining Contractual Maturity of the Agreements	$ 0