Segment Information - Consolidated Financial Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total segment adjusted EBITDA (loss)	$ (22,542)	$ (29,365)	$ (24,304)	$ (36,946)
Reconciling items:
Corporate and other	(12,231)	(13,769)	(27,257)	(28,070)
Depreciation and amortization	(6,202)	(6,214)	(12,519)	(12,229)
Stock-based compensation expense	(7,105)	(6,404)	(12,473)	(13,298)
Restructuring costs	(1,635)	(1,093)	(1,792)	(2,077)
Other non-operating income	(1,696)	0	(2,872)	0
Acquisition and other transaction costs	12	(258)	(166)	(386)
Impairment loss on intangible assets and goodwill	0	(55,211)	0	(57,232)
Reinsurance Recoverable, Allowance for Credit Loss, Recovery (Loss)	1,095	(48,244)	1,106	(48,244)
Impairment loss on property, equipment and software	0	(254)	0	(254)
Change in fair value of contingent consideration	1,351	2,656	300	2,810
Investment income and realized gains	(3,526)	(1,249)	(7,170)	(2,007)
Operating loss	(52,479)	(159,405)	(87,147)	(197,933)
Vertical Software segment | Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total segment adjusted EBITDA (loss)	4,778	1,816	5,901	1,420
Insurance segment | Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total segment adjusted EBITDA (loss)	$ (27,320)	$ (31,181)	$ (30,205)	$ (38,366)