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Commitments And Contingent Liabilities (Schedule Of Contractual Amounts Of Commitments And Contingent Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Long-term Purchase Commitment [Line Items]
Total contractual amount of commitment and contingent liability	$ 160,884	$ 151,531
Commitments To Originate Loans [Member]
Long-term Purchase Commitment [Line Items]
Total contractual amount of commitment and contingent liability	41,731	41,529
Unused Lines Of Credit [Member]
Long-term Purchase Commitment [Line Items]
Total contractual amount of commitment and contingent liability	98,823	97,283
Un-Advanced Portions Of Construction Loans [Member]
Long-term Purchase Commitment [Line Items]
Total contractual amount of commitment and contingent liability	$ 20,330	$ 12,719