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Commitments and Contingencies (Summarized credit-related financial instruments) (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Commitments and Contingencies [Abstract]    
Commitments To Extend Credit $ 588,159 $ 541,423
Commercial letters credit 121 340
Standby letters of credit and financial guarantees 12,595 23,889
Loans sold with recourse $ 5,341 $ 5,414