Derivative Instruments (Schedule Of Effect Of Derivatives Not Designated As Hedges On Results Of Operations) (Details) (Not Designated as Hedging Instrument [Member], Embedded Derivative Financial Instruments [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Not Designated as Hedging Instrument [Member] | Embedded Derivative Financial Instruments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized Gain (Loss) on Derivatives	$ 2,659	$ 1,580