Property, Plant And Equipment (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Interest capitalized	$ 86	$ 904	$ 878
Interest cost rate	6.27%	4.71%	4.82%
Additions of property, plant and equipment	$ 943	$ 21,430	$ 2,174
Impairment loss		8,084
Land and Improvements [Member]
Impairment loss		6,094
Building [Member]
Impairment loss		$ 1,990