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Commitments (Summarized credit-related financial instruments) (Details) - USD ($)
$ in Thousands
Sep. 30, 2015
Dec. 31, 2014
Commitments and Contingencies [Abstract]    
Commitments To Extend Credit $ 432,006 $ 493,248
Commercial letters credit 1,443 885
Standby letters of credit and financial guarantees 15,007 32,970
Performance letters of credit and financial guarantees 24,996  
Loans sold with recourse $ 61,597 67,803
Commitments To Sell Or Securitize Mortgage Loans   $ 10,207