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Other Operating Expenses (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Other Operating Expenses [Abstract]      
General and administrative expenses $ 1,877 $ 1,905 $ 1,545
Travel and other employee expenses 1,530 1,298 1,354
Partnership income(1) 0 0 (790)
Other expenses 23 12 129
Total other non-interest expense $ 3,430 $ 3,215 $ 2,238