Fair Value Of Financial Instruments (Changes In Fair Value Measurement Of Level 3 Items) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	$ 28,549	$ 23,735	$ 26,755	$ 29,004
contingent interest payment for debenture	0	0	(5,225)	0
Unrealized (gain) loss on contingent interest derivative on Convertible Debentures	(2,708)	(5,246)	4,311	(10,515)
Ending balance	$ 25,841	$ 18,489	$ 25,841	$ 18,489