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Commitments and Contingent Liabilities (Schedule of Commitments) (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Supply Commitment [Line Items]    
Contractual Obligation $ 122,348 $ 130,663
Loan Origination Commitments [Member]    
Supply Commitment [Line Items]    
Contractual Obligation 120,786 129,076
Commitments to Extend Credit [Member]    
Supply Commitment [Line Items]    
Contractual Obligation $ 1,562 $ 1,587