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BORROWINGS (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
BORROWINGS    
Borrowings $ 0 $ 0
Securities pledged, served as collateral 544,999 548,229
Loans pledged in association with Mortgage Partnership Finance Program 355 355
FRB Discount Window    
BORROWINGS    
Borrowings 0 0
Securities pledged, served as collateral $ 511 $ 515