Business Combinations - Additional Information (Details) $ in Thousands		3 Months Ended		9 Months Ended
	Jul. 01, 2023 client	Sep. 30, 2023 USD ($) business	Sep. 30, 2022 USD ($) business	Sep. 30, 2023 USD ($) business	Sep. 30, 2022 USD ($) business
Business Acquisition, Contingent Consideration [Line Items]
Number of clients from acquiree | client	1,200
Annualized revenue				$ 67,300
Transaction and integration related costs				3,100
Proceeds from sales of divested operations				1,696	$ 2,906
Financial Services practice group
Business Acquisition, Contingent Consideration [Line Items]
Gain on disposition of business		$ 1,400		$ 1,500
Number of businesses sold | business		1		1
Benefits and Insurance Services
Business Acquisition, Contingent Consideration [Line Items]
Gain on disposition of business			$ 2,400		$ 2,400
Number of businesses sold | business			1		1
Proceeds from sales of divested operations			$ 2,500		$ 2,500
Client list
Business Acquisition, Contingent Consideration [Line Items]
Acquired finite-lived intangible assets, useful life				10 years
Other intangibles
Business Acquisition, Contingent Consideration [Line Items]
Acquired finite-lived intangible assets, useful life				3 years