Segment Reporting (Details 1) - USD ($) $ in Thousands	Apr. 01, 2017	Dec. 31, 2016
Americas:
Total Americas	$ 195,546	$ 194,507
Total long-lived assets	243,949	238,607
United States [Member]
Summary of long-lived assets by geography
Long-Lived Assets in Individual Foreign Countries	194,801	193,750
Other Americas [Member]
Summary of long-lived assets by geography
Long-Lived Assets in Individual Foreign Countries	745	757
Asia [Member]
Summary of long-lived assets by geography
Long-Lived Assets in Individual Foreign Countries	33,696	30,564
EMEA [Member]
Summary of long-lived assets by geography
Long-Lived Assets in Individual Foreign Countries	13,919	12,692
Japan [Member]
Summary of long-lived assets by geography
Long-Lived Assets in Individual Foreign Countries	$ 788	$ 844