Business Combinations - Aggregated Consideration And Preliminary Purchase Price Allocation (Details) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Business Acquisition [Line Items]
Goodwill	$ 865,180	$ 819,917	$ 740,743
Series of Individually Immaterial Business Acquisitions
Business Acquisition [Line Items]
Common stock issued (in shares)	102	42
Common stock value	$ 4,796	$ 1,668
Cash paid	53,027	79,141
Recorded contingent consideration	32,142	74,199
Total recorded purchase price	89,965	155,008
Accounts receivable acquired, net	8,544	20,429
Fixed assets acquired	1,108	1,933
Identifiable intangible assets acquired	35,267	53,400
Operating lease right-of-use asset acquired	14,972	49,291
Other assets acquired	1,163	1,693
Operating lease liability acquired - current	(1,080)	(5,860)
Other current liabilities acquired	(1,371)	(1,594)
Operating lease liability acquired - noncurrent	(13,892)	(43,431)
Goodwill	45,254	79,147
Total net assets acquired	89,965	155,008
Maximum potential contingent consideration	$ 33,845	$ 77,075