Interest (Schedule Of Capitalized Interest Costs) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Interest [Abstract]
Interest capitalized beginning of period	$ 47,797	$ 35,668	$ 41,762	$ 28,935
Interest capitalized during period	16,109	13,338	43,387	31,902
Less: capitalized interest in cost of sales	(12,334)	(8,794)	(33,577)	(20,625)
Interest capitalized end of period	$ 51,572	$ 40,212	$ 51,572	$ 40,212