Other Liabilities - Summary of Other Liabilities (Detail) - USD ($) $ in Thousands	Oct. 01, 2021	Dec. 31, 2020
Other Liabilities Disclosure [Abstract]
Noncurrent portion of acquisition related contingent consideration	$ 449,447	$ 398,674
Accruals for executive benefit plans	142,853	144,101
Noncurrent deferred proceeds from related parties	107,070	109,361
Noncurrent portion of deferred payroll taxes under CARES Act	18,739	18,706
Other	8,183	8,438
Total other liabilities	$ 726,292	$ 679,280