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Securities - Contractual Maturities - Additional Information (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Securities    
Proceeds from maturities, calls and principal repayments of securities $ 8,900 $ 8,100
Proceeds from sales of securities available-for-sale 0 0
Gross realized gains on available-for-sale securities 0 0
Realized losses $ 0 $ 0