Fair Value of Financial Instruments - Fair Value of Financial Assets and Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Liabilities:
Accruals and other current liabilities	$ 3,401	$ 5,382
Fair Value, Recurring
Assets:
Total assets	22,222	10,138
Liabilities:
Acquisition contingent consideration	4,361	6,613
Deferred compensation plan liabilities	97,061	102,199
Cash-settled equity awards	497	353
Total liabilities	101,919	109,165
Accruals and other current liabilities	3,401	5,382
Deferred compensation plan, current	7,779	7,309
Fair Value, Recurring | Interest rate swap
Assets:
Interest rate swap	22,201	10,117
Fair Value, Recurring | Money Market Funds
Assets:
Money market funds	21	21
Level 1 | Fair Value, Recurring
Assets:
Total assets	21	21
Liabilities:
Acquisition contingent consideration	0	0
Deferred compensation plan liabilities	97,061	102,199
Cash-settled equity awards	497	353
Total liabilities	97,558	102,552
Level 1 | Fair Value, Recurring | Interest rate swap
Assets:
Interest rate swap	0	0
Level 1 | Fair Value, Recurring | Money Market Funds
Assets:
Money market funds	21	21
Level 2 | Fair Value, Recurring
Assets:
Total assets	22,201	10,117
Liabilities:
Acquisition contingent consideration	0	0
Deferred compensation plan liabilities	0	0
Cash-settled equity awards	0	0
Total liabilities	0	0
Level 2 | Fair Value, Recurring | Interest rate swap
Assets:
Interest rate swap	22,201	10,117
Level 2 | Fair Value, Recurring | Money Market Funds
Assets:
Money market funds	0	0
Level 3 | Fair Value, Recurring
Assets:
Total assets	0	0
Liabilities:
Acquisition contingent consideration	4,361	6,613
Deferred compensation plan liabilities	0	0
Cash-settled equity awards	0	0
Total liabilities	4,361	6,613
Level 3 | Fair Value, Recurring | Interest rate swap
Assets:
Interest rate swap	0	0
Level 3 | Fair Value, Recurring | Money Market Funds
Assets:
Money market funds	$ 0	$ 0