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Commitments And Contingencies (Off-Balance Sheet Commitments) (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Commitments To Extend Credit [Member]    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Off-balance sheet commitments $ 536,312 $ 555,713
Standby Letters Of Credit [Member]    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Off-balance sheet commitments $ 13,232 $ 12,689