Acquisitions - Other Acquisition (Details) - USD ($) $ in Thousands				12 Months Ended
	Sep. 10, 2020	Aug. 25, 2020	Dec. 16, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Cash consideration, net of cash acquired				$ 180,002	$ 10,627	$ 14,945
Goodwill				$ 269,115	$ 165,358	$ 148,561
Gadberry
Business Acquisition [Line Items]
Cash consideration, net of cash acquired	$ 4,600
Maximum amount of equity based compensation to be earned over time	9,900
Equity-based compensation, value	$ 900
Gadberry | Minimum
Business Acquisition [Line Items]
Service period over which equity based compensation is accounted (in years)	2 years
Gadberry | Maximum
Business Acquisition [Line Items]
Service period over which equity based compensation is accounted (in years)	3 years
Gadberry | Common Class A
Business Acquisition [Line Items]
Consideration transferred, stock	$ 5,500
Wemlo
Business Acquisition [Line Items]
Cash consideration, net of cash acquired		$ 6,100
Maximum amount of equity based compensation to be earned over time		$ 6,700
Service period over which equity based compensation is accounted (in years)		3 years
Goodwill		$ 14,400
Other intangible assets		6,300
Wemlo | Common Class A
Business Acquisition [Line Items]
Consideration transferred, stock		$ 3,300
First Leads
Business Acquisition [Line Items]
Cash consideration			$ 15,000