Property, Plant And Equipment (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Property, Plant and Equipment [Abstract]
Interest capitalized	$ 22	$ 11	$ 39	$ 23
Interest cost rate	2.40%	5.46%	2.40%	5.46%