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SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Securities sold under agreements to repurchase    
Securities sold under agreements to repurchase $ 816 $ 877
Carrying amount of U.S. GSE residential collateralized mortgage obligations and U.S. GSE residential mortgage-backed securities 2,400 $ 1,800
Maturing during the fourth quarter    
Securities sold under agreements to repurchase    
Securities sold under agreements to repurchase $ 800  
U.S. GSE residential collateralized mortgage obligations    
Securities sold under agreements to repurchase    
Percentage of investment securities held as collateral 18.00% 52.00%
U.S. GSE residential mortgage-backed securities    
Securities sold under agreements to repurchase    
Percentage of investment securities held as collateral 82.00% 48.00%