Assets Held for Sale (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	1 Months Ended	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Abstract]
Assets Held-for-sale, at Carrying Value		$ 2,179	$ 0	$ 2,179
Asset impairment charges		1,571		1,571
Proceeds from sale of Hungarian subsidiary	1,500		1,500	0	0
Proceeds from disposal of property and equipment	800		167	238	0
Change in fair value of assets held for sale			698	0	0
Equipment in property and equipment transferred to (from) assets held for sale			(333)	2,179	0
Loss on disposal and exchange of Assets Held for Sale, net			$ 87	$ 0	$ 0