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Loan Servicing (Mortgage-Servicing Rights) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Accounting for Certain Loans Acquired in a Transfer [Abstract]      
Balances, January 1 $ 1,504 $ 1,351 $ 1,335
Mortgage-servicing rights acquired 1,325    
Servicing rights capitalized 438 549 482
Amortization of servicing rights (596) (396) (466)
Ending balance $ 2,671 $ 1,504 $ 1,351