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Commitments (Summarized credit-related financial instruments) (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Commitments and Contingencies [Abstract]    
Commitments To Extend Credit $ 492,885 $ 456,720
Commercial letters credit 2,721 1,508
Standby letters of credit and financial guarantees 4,041 14,656
Loans sold with recourse $ 20,126 $ 22,374