Quarterly report pursuant to Section 13 or 15(d)

Segment Information (Consolidated Net Sales And Long Lived Assets) (Details)

v3.20.1
Segment Information (Consolidated Net Sales And Long Lived Assets) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 28, 2020
Mar. 30, 2019
Dec. 28, 2019
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net sales $ 266,619 $ 272,990  
China [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net sales 115,478 $ 127,372  
Long-lived assets 88,131   $ 90,886
United States [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Long-lived assets $ 59,345   $ 54,809