Segment Reporting (Details 1) - USD ($) $ in Thousands	Mar. 30, 2019	Dec. 29, 2018
Summary of long-lived assets by geography
Total long-lived assets	$ 253,392	$ 252,630
United States [Member]
Summary of long-lived assets by geography
Long-lived assets in individual foreign countries	198,168	200,025
Other Americas [Member]
Summary of long-lived assets by geography
Long-lived assets in individual foreign countries	506	475
Americas [Member]
Summary of long-lived assets by geography
Long-lived assets in individual foreign countries	198,674	200,500
China [Member]
Summary of long-lived assets by geography
Long-lived assets in individual foreign countries	15,064	9,608
Other Asia [Member]
Summary of long-lived assets by geography
Long-lived assets in individual foreign countries	28,180	30,021
Asia [Member]
Summary of long-lived assets by geography
Long-lived assets in individual foreign countries	43,244	39,629
EMEA [Member]
Summary of long-lived assets by geography
Long-lived assets in individual foreign countries	10,830	11,784
Japan [Member]
Summary of long-lived assets by geography
Long-lived assets in individual foreign countries	$ 644	$ 717