Business Combinations - Additional Information (Details) $ in Thousands		12 Months Ended
	Jul. 01, 2023 client	Dec. 31, 2023 USD ($) business	Dec. 31, 2022 USD ($) business	Dec. 31, 2021 USD ($)
Business Acquisition, Contingent Consideration [Line Items]
Number of clients from acquiree | client	1,200
Business acquisition, annualized revenue		$ 64,900
Proceeds from sales of assets and divested operations		3,059	$ 3,022	$ 9,710
Financial Services Practice Group
Business Acquisition, Contingent Consideration [Line Items]
Gain (loss) on disposition of business		$ 1,500
Number of business sold | business		1
Benefits and Insurance Services
Business Acquisition, Contingent Consideration [Line Items]
Gain (loss) on disposition of business		$ 1,400	$ 2,400
Number of business sold | business			1
Proceeds from sales of assets and divested operations			$ 2,500
Client lists
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
Somerest Acquisition
Business Acquisition, Contingent Consideration [Line Items]
Transaction and integration related costs		$ 3,400
Marks Paneth Acquisition
Business Acquisition, Contingent Consideration [Line Items]
Transaction and integration related costs		$ 10,500