Interest (Schedule Of Capitalized Interest Costs) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Interest [Abstract]
Interest capitalized beginning of period	$ 26,577	$ 15,741	$ 21,533	$ 11,302
Interest capitalized during period	6,743	5,189	19,772	14,079
Less: capitalized interest in cost of sales	(5,192)	(2,474)	(13,177)	(6,925)
Interest capitalized end of period	$ 28,128	$ 18,456	$ 28,128	$ 18,456