Goodwill and Other Intangible Assets (Schedule of Changes in Intangible Assets and Goodwill) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Amortized intangible assets:
Beginning balance	$ 385	$ 616
Amortization	$ (231)	$ (231)
Currency Translation
Ending balance	$ 154	$ 385
Goodwill
Beginning balance	$ 71,680	$ 78,890
Amortization
Currency translation	$ (5,307)	$ (7,210)
Ending balance	66,373	71,680
AEC Trade Names [Member]
Amortized intangible assets:
Beginning balance	29	33
Amortization	$ (4)	$ (4)
Currency Translation
Ending balance	$ 25	$ 29
AEC Customer Contracts [Member]
Amortized intangible assets:
Beginning balance	202	404
Amortization	$ (202)	$ (202)
Currency Translation
Ending balance		$ 202
AEC Technology [Member]
Amortized intangible assets:
Beginning balance	$ 154	179
Amortization	$ (25)	$ (25)
Currency Translation
Ending balance	$ 129	$ 154