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Investment Securities - Investments, Debt and Equity Securities (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract]    
Investments in equity securities $ 7,111 $ 5,857
Fair Value 14,667 12,252
Total investment securities $ 21,778 $ 18,109