Other Noncurrent Liabilities (Details) - USD ($) $ in Thousands	Dec. 29, 2020	Dec. 31, 2019
Other Noncurrent Liabilities
Non-qualified deferred compensation liabilities	$ 83,702	$ 76,255
Deferred consideration	21,379	37,193
Contingent consideration and compensation liabilities	7,465	13,218
Payroll taxes (1)	18,308
Other	18,871	13,882
Total	$ 149,725	$ 140,548