Segment Information (Details 2) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Summary of assets by geographic region
Total Assets	$ 245,603	$ 259,952
United States [Member]
Summary of assets by geographic region
Total Assets	211,186	223,430
Malaysia [Member]
Summary of assets by geographic region
Total Assets	34,385	36,492
Other [Member]
Summary of assets by geographic region
Total Assets	$ 32	$ 30