Fair Value Of Financial Instruments (Changes In Fair Value Measurement Of Level 3 Items) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	$ 25,841	$ 18,489	$ 26,755	$ 29,004
Contingent interest payment for debenture	(5,534)	0	(10,759)	0
Unrealized (gain) loss on contingent interest derivative on Convertible Debentures	4,747	6,562	9,058	(3,953)
Ending balance	$ 25,054	$ 25,051	$ 25,054	$ 25,051