Interest Rate Swap Derivatives (Offsetting Assets And Liabilities) (Details) - Not Designated as Hedging Instrument - Interest Rate Swap - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Other Assets
Derivative [Line Items]
Asset derivative, fair value	$ 3,053	$ 5,239
Asset derivative, amounts offset in the balance sheet	0	0
Asset derivative, net amounts in the balance sheet	3,053	5,239
Asset derivative, netting adjustment per applicable master netting agreements	0	0
Asset derivative, fair value of financial collateral in the balance sheet	0	0
Asset derivative, net amount	3,053	5,239
Other Liabilities
Derivative [Line Items]
Liability derivatives, fair value	3,053	5,239
Liability derivatives, amounts offset in balance sheet	0	0
Liability derivatives, net amounts in balance sheet	3,053	5,239
Liability derivatives, netting adjustment per applicable master netting agreements	0	0
Liability derivatives, fair value of financial collateral in the balance sheet	6,300	5,000
Liability derivatives, net amount	$ (3,247)	$ 239