Fair Value Measurements - Summary of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred compensation plan assets	$ 132,284	$ 136,321
Available-for-sale debt securities	43,665	38,670	$ 25,708
Deferred compensation plan liabilities	(132,284)	(136,321)
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred compensation plan assets	132,284	136,321
Available-for-sale debt securities	43,665	38,670
Other depository assets	853	1,144
Deferred compensation plan liabilities	(132,284)	(136,321)
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swaps	3,578	(211)
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent purchase price liabilities	$ (136,534)	$ (79,139)