Segment Reporting (Details 1) - USD ($) $ in Thousands	Jul. 01, 2017	Dec. 31, 2016
Americas:
Total Americas	$ 198,341	$ 194,507
Total long-lived assets	249,140	238,607
United States [Member]
Summary of long-lived assets by geography
Long-Lived Assets in Individual Foreign Countries	197,663	193,750
Other Americas [Member]
Summary of long-lived assets by geography
Long-Lived Assets in Individual Foreign Countries	678	757
Asia [Member]
Summary of long-lived assets by geography
Long-Lived Assets in Individual Foreign Countries	36,046	30,564
EMEA [Member]
Summary of long-lived assets by geography
Long-Lived Assets in Individual Foreign Countries	14,063	12,692
Japan [Member]
Summary of long-lived assets by geography
Long-Lived Assets in Individual Foreign Countries	$ 690	$ 844