SHORT-TERM BORROWINGS - Remaining contractual maturity of repurchase agreements (Details) $ in Thousands	Dec. 31, 2021 USD ($)
Repurchase agreements and repurchase-to-maturity transactions:
Remaining Contractual Maturity of the Agreements	$ 27,377
U.S. Treasury and/or agency securities [Member]
Repurchase agreements and repurchase-to-maturity transactions:
Remaining Contractual Maturity of the Agreements	27,377
Overnight and Continuous [Member]
Repurchase agreements and repurchase-to-maturity transactions:
Remaining Contractual Maturity of the Agreements	27,377
Overnight and Continuous [Member] | U.S. Treasury and/or agency securities [Member]
Repurchase agreements and repurchase-to-maturity transactions:
Remaining Contractual Maturity of the Agreements	27,377
Upto 30 Days [Member]
Repurchase agreements and repurchase-to-maturity transactions:
Remaining Contractual Maturity of the Agreements	0
Upto 30 Days [Member] | U.S. Treasury and/or agency securities [Member]
Repurchase agreements and repurchase-to-maturity transactions:
Remaining Contractual Maturity of the Agreements	0
30 to 90 Days [Member]
Repurchase agreements and repurchase-to-maturity transactions:
Remaining Contractual Maturity of the Agreements	0
30 to 90 Days [Member] | U.S. Treasury and/or agency securities [Member]
Repurchase agreements and repurchase-to-maturity transactions:
Remaining Contractual Maturity of the Agreements	0
Greater than 90 Days [Member]
Repurchase agreements and repurchase-to-maturity transactions:
Remaining Contractual Maturity of the Agreements	0
Greater than 90 Days [Member] | U.S. Treasury and/or agency securities [Member]
Repurchase agreements and repurchase-to-maturity transactions:
Remaining Contractual Maturity of the Agreements	$ 0