Derivative Instruments (Fair Value Of Derivative Instruments) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Designated as Hedging Instrument [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	$ 4,842	$ 5,475
Fair Value	229	61
Not Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	398,139	372,995
Fair Value	29,415	10,811
Not Designated as Hedging Instrument [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	405,662	380,995
Fair Value	$ 29,733	$ 10,872