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SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE - Narrative (Details) - USD ($) $ in Thousands | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Securities sold under agreements to repurchase |  |
Repurchase agreements | $ 956 | $ 539
Carrying amount of U.S. GSE residential collateralized mortgage obligations and U.S. GSE residential mortgage-backed securities | 2,200 | $ 2,400
Maturing during the fourth quarter |  |
Securities sold under agreements to repurchase |  |
Repurchase agreements | $ 1,000 |
U.S. GSE residential collateralized mortgage obligations |  |
Securities sold under agreements to repurchase |  |
Percentage of investment securities held as collateral | 17.00% | 18.00%
U.S. GSE residential mortgage-backed securities |  |
Securities sold under agreements to repurchase |  |
Percentage of investment securities held as collateral | 83.00% | 82.00%

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