Interest (Schedule Of Capitalized Interest Costs) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Interest [Abstract]
Interest capitalized beginning of period	$ 24,846	$ 13,600	$ 21,533	$ 11,302
Interest capitalized during period	6,649	4,971	13,029	8,890
Less: capitalized interest in cost of sales	(4,918)	(2,830)	(7,985)	(4,451)
Interest capitalized end of period	$ 26,577	$ 15,741	$ 26,577	$ 15,741