Other Liabilities - Summary of Other Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Other Liabilities Disclosure [Abstract]
Noncurrent portion of acquisition related contingent consideration	$ 490,587	$ 398,674
Accruals for executive benefit plans	147,135	144,101
Noncurrent deferred proceeds from related parties	106,304	109,361
Noncurrent portion of deferred payroll taxes under CARES Act	0	18,706
Other	14,584	8,438
Total other liabilities	$ 758,610	$ 679,280