Interest (Schedule Of Capitalized Interest Costs) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Interest [Abstract]
Interest capitalized beginning of period	$ 41,762	$ 28,935	$ 21,533
Interest capitalized during period	60,772	45,725	26,904
Less: capitalized interest in cost of sales	(48,692)	(32,898)	(19,502)
Interest capitalized end of period	$ 53,842	$ 41,762	$ 28,935