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Commitments (Summarized credit-related financial instruments) (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Commitments and Contingencies [Abstract]    
Commitments To Extend Credit $ 607,051 $ 493,248
Commercial letters credit 1,508 885
Standby letters of credit and financial guarantees 14,656 32,970
Performance letters of credit and financial guarantees 22,374  
Loans sold with recourse $ 34,888 67,803
Commitments To Sell Or Securitize Mortgage Loans   $ 10,207