Other Operating Expenses/(Income) (Schedule Of Other Operating Expenses/(Income)) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Total other operating expenses/(income)	$ 2,570	$ (118)	$ 8,923	$ (169)
Litigation Settlement [Member]
Total other operating expenses/(income)		(204)	6,000	(204)
Transportation Equipment Held For Sale [Member]
Total other operating expenses/(income)	2,266		2,266
Loss On Disposal Of Fixed Assets [Member]
Total other operating expenses/(income)	$ 304	$ 86	$ 657	$ 35