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Acquisitions and Dispositions (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 28, 2019
Sep. 29, 2018
Sep. 28, 2019
Sep. 29, 2018
Dec. 29, 2018
Subsequent Event [Line Items]          
Acquisitions, net of cash acquired     $ 1,431 $ 51,301  
Goodwill $ 1,212,313   1,212,313   $ 1,229,159
Proceeds from sale of investment in subsidiary     0 82,805  
Loss on disposal of subsidiaries $ 0 $ (3,038) $ 0 $ 12,500