Segment Reporting (Details 1) (USD $) In Thousands, unless otherwise specified	Sep. 29, 2012	Dec. 31, 2011
Summary of long-lived assets by geography
Total long-lived assets	$ 246,856	$ 262,517
Americas:
United States	215,656	230,884
Total Americas	215,740	230,919
Other Americas [Member]
Summary of long-lived assets by geography
Long-Lived Assets in Individual Foreign Countries	84	35
Europe, Middle East and Africa [Member]
Summary of long-lived assets by geography
Long-Lived Assets in Individual Foreign Countries	5,081	4,813
Japan [Member]
Summary of long-lived assets by geography
Long-Lived Assets in Individual Foreign Countries	2,247	3,960
Asia [Member]
Summary of long-lived assets by geography
Long-Lived Assets in Individual Foreign Countries	$ 23,788	$ 22,825