Acquisitions - Narrative (Details) $ in Thousands			6 Months Ended	12 Months Ended
	May 03, 2022 USD ($)	Apr. 01, 2022 company	Jun. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)	Mar. 10, 2023 USD ($)	Dec. 31, 2021 USD ($)
Business Acquisition
Goodwill			$ 775,855	$ 705,894		$ 657,131
Number of businesses acquired | company		2
Gerald Eve
Business Acquisition
Goodwill			75,600		$ 75,638
Business acquisition, amount deductible for tax			54,800
Business acquisition, aggregate revenue contribution			33,400
Net assets acquired					$ 113,015
2022 Business Acquisitions
Business Acquisition
Cash and stock issued at closing	$ 65,533			65,500
Goodwill	50,756			50,800
Business acquisition, amount deductible for tax				35,100
Business acquisition, aggregate revenue contribution				17,800
Net assets acquired	$ 72,855			$ 72,900
Restricted Stock Units | Gerald Eve
Business Acquisition
Shares issued as compensation			$ 113,000