Derivative And Financial Instruments (Embedded Derivative) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2016	Dec. 31, 2015
Derivative And Financial Instruments [Abstract]
Beginning Balance		$ (193,077)
Initial fair value of embedded derivative - bifurcated from mezzanine equity			(183,095)
Gain (loss) on embedded derivative	$ 6,898	13,192	(9,982)
Ending Balance	$ (179,885)	$ (179,885)	$ (193,077)