Business Combinations - Aggregated Consideration And Preliminary Purchase Price Allocation (Details) - Series of Individually Immaterial Business Acquisitions - USD ($) shares in Thousands, $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Business Acquisition, Contingent Consideration [Line Items]
Common stock issued (in shares)	0	122
Common stock value	$ 0	$ 4,060
Cash paid	72,469	43,104
Recorded contingent consideration	64,648	20,124
Total recorded purchase price	137,117	67,288
Accounts receivable acquired	18,230	5,639
Fixed assets acquired	1,793	781
Identifiable intangible assets acquired	49,000	22,393
Operating lease right-of-use asset acquired	49,291	13,413
Other assets acquired	1,497	429
Operating lease liability acquired - current	(5,860)	(1,070)
Other current liabilities acquired	(909)	(971)
Operating lease liability acquired - non-current	(43,431)	(12,343)
Goodwill	67,506	39,017
Total net assets acquired	137,117	67,288
Maximum potential contingent consideration	$ 67,115	$ 21,115