BORROWINGS - Remaining contractual maturity of the repurchase agreements (Details) $ in Thousands	Sep. 30, 2023 USD ($)
Repurchase agreements and repurchase-to-maturity transactions:
Remaining Contractual Maturity of the Agreements	$ 17,715
U.S. Treasury and/or agency securities
Repurchase agreements and repurchase-to-maturity transactions:
Remaining Contractual Maturity of the Agreements	17,715
Overnight and Continuous
Repurchase agreements and repurchase-to-maturity transactions:
Remaining Contractual Maturity of the Agreements	17,715
Overnight and Continuous | U.S. Treasury and/or agency securities
Repurchase agreements and repurchase-to-maturity transactions:
Remaining Contractual Maturity of the Agreements	17,715
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