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Other Operating Expense (Schedule of Other Operating Expense) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Other Income and Expenses [Abstract]      
Postage and supplies $ 2,180 $ 2,087 $ 1,925
Promotional expense 3,344 2,557 2,187
Professional fees 2,170 1,650 1,930
Outside service fees 4,909 4,424 3,316
Data processing services 919 897 372
Telecommunications 778 749 1,000
Other 1,963 1,722 1,913
Total other operating expense $ 16,263 $ 14,086 $ 12,643