Segment Reporting (Long-lived assets) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Schedule of long-lived assets by geographical area
Long-lived assets	$ 18,312		$ 31,821		$ 41,592
United States
Schedule of long-lived assets by geographical area
Long-lived assets	16,189		25,953		34,817
Europe
Schedule of long-lived assets by geographical area
Long-lived assets	2,123	[1]	5,157	[1]	4,395	[1]
Asia
Schedule of long-lived assets by geographical area
Long-lived assets	$ 0		$ 711		$ 2,380

[1] Primarily Hungary