XML 81 R63.htm IDEA: XBRL DOCUMENT v3.20.4
Property, Plant and Equipment - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 27, 2020
Dec. 29, 2019
Dec. 30, 2018
Property, Plant and Equipment [Abstract]      
Depreciation expense $ 120,229 $ 133,528 $ 139,255