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Other Liabilities (Tables)
 12 Months Ended
Dec. 31, 2021
Other Liabilities Disclosure [Abstract]  
Summary of Other Liabilities
Other liabilities consisted of the following:

(in thousands)December 31, 2021December 31, 2020
Noncurrent portion of acquisition related contingent consideration$490,587 $398,674 
Accruals for executive benefit plans147,135 144,101 
Noncurrent deferred proceeds from related parties106,304 109,361 
Noncurrent portion of deferred payroll taxes under CARES Act— 18,706 
Other14,584 8,438 
Total other liabilities$758,610 $679,280