Quarterly report pursuant to Section 13 or 15(d)

Segment Reporting (Details Textual)

v3.20.2
Segment Reporting (Details Textual)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 26, 2020
USD ($)
Sep. 28, 2019
USD ($)
Sep. 26, 2020
USD ($)
Segment
Sep. 28, 2019
USD ($)
Segment Reporting Information [Line Items]        
Number of reportable segments | Segment     2  
Amortization of intangible assets $ 4,558 $ 4,478 $ 13,323 $ 13,544
Goodwill Impairment Charges     31,871  
Corporate and Other [Member]        
Segment Reporting Information [Line Items]        
Unallocated costs     47,801  
Corporate costs not deemed allocable to either business segment     $ 2,607