Interest Rate Swap Derivatives (Offsetting Assets And Liabilities) (Details) - Not Designated as Hedging Instrument - Interest Rate Swap - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Other Assets
Derivative [Line Items]
Asset derivative, fair value	$ 18,769	$ 8,646
Asset derivative, amounts offset in the Balance Sheet	0	0
Asset derivative, net amounts in the Balance Sheet	18,769	8,646
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	18,769	8,646
Other Liabilities
Derivative [Line Items]
Liability derivatives, fair value	18,769	8,646
Liability derivatives, amounts offset in Balance Sheet	0	0
Liability derivatives, net amounts in Balance Sheet	18,769	8,646
Liability derivatives, netting adjustment per applicable master netting agreements	0	0
Liability derivatives, fair value of financial collateral in the Balance Sheet	18,865	8,595
Liability derivatives, net amount	$ (96)	$ 51