Fair Value Measurements (Details) - USD ($) $ in Thousands	Dec. 29, 2020	Dec. 31, 2019
Assets (Liabilities) at fair value
Non-qualified deferred compensation liabilities	$ (83,702)	$ (76,255)
Deferred consideration related to Acquisition	(21,379)	(37,193)
Minimum
Assets (Liabilities) at fair value
Undiscounted range of out comes	0	0
Maximum
Assets (Liabilities) at fair value
Undiscounted range of out comes	32,000	69,200
Level 1
Assets (Liabilities) at fair value
Non-qualified deferred compensation assets	83,485	77,228
Non-qualified deferred compensation liabilities	(83,702)	(76,255)
Level 2
Assets (Liabilities) at fair value
Interest rate swap	(4,591)
Acquisition-related deferred consideration	(38,119)	(53,933)
Level 3
Assets (Liabilities) at fair value
Acquisition-related contingent consideration and compensation liabilities	$ (7,465)	$ (13,218)