BORROWINGS - Remaining contractual maturity of repurchase agreements (Details) $ in Thousands	Sep. 30, 2025 USD ($)
Repurchase agreements and repurchase-to-maturity transactions:
Remaining Contractual Maturity of the Agreements	$ 32,856
U.S. Treasury and/or agency securities
Repurchase agreements and repurchase-to-maturity transactions:
Remaining Contractual Maturity of the Agreements	32,856
Overnight and Continuous
Repurchase agreements and repurchase-to-maturity transactions:
Remaining Contractual Maturity of the Agreements	32,856
Overnight and Continuous | U.S. Treasury and/or agency securities
Repurchase agreements and repurchase-to-maturity transactions:
Remaining Contractual Maturity of the Agreements	32,856
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
Greater 30 - 90 Days
Repurchase agreements and repurchase-to-maturity transactions:
Remaining Contractual Maturity of the Agreements	0
Greater 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