XML 31 R61.htm IDEA: XBRL DOCUMENT v3.19.3
Property and Equipment Property and Equipment Narrative (Details)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 28, 2019
USD ($)
Facilities
Sep. 29, 2018
USD ($)
Sep. 28, 2019
USD ($)
Sep. 29, 2018
USD ($)
Dec. 29, 2018
USD ($)
Property, Plant and Equipment [Line Items]          
Total property and equipment $ 319,987   $ 319,987   $ 263,762
Accumulated depreciation 110,529   110,529   $ 97,790
Depreciation $ 4,800 $ 4,000 $ 14,300 $ 12,100  
Properties Purchased | Facilities 2        
Property, Plant and Equipment, Additions $ 35,600