Derivatives and Hedging (Offsetting Of Derivative Assets And Liabilities) (Details) - Interest Rate Contracts [Member] $ in Thousands	Dec. 31, 2017 USD ($)
Offsetting Assets [Line Items]
Gross amounts recognized, assets	$ 2,035
Gross amounts offset in balance sheet, assets	0
Net amounts presented in Balance Sheet	2,035
Gross amount not offset in balance sheet, financial instruments, assets	0
Gross amount not offset in balance sheet, cash collateral received, assets	0
Net amount, assets	$ 2,035