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Core Deposit Intangible - Schedule of Finite-Lived Intangible Assets (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2018
Dec. 31, 2017
Finite-lived Intangible Assets [Roll Forward]          
Amortization $ (184) $ (496)      
Core Deposits [Member]          
Finite-lived Intangible Assets [Roll Forward]          
Balance at the beginning of the year 782 1,305      
Amortization (496) (523) $ (550)    
Additions 0 0      
Net Carrying Value $ 782 $ 1,305 $ 1,305 $ 286 $ 782
Gross carrying amount       5,932 5,932
Accumulated amortization       $ (5,646) $ (5,150)