Revenue - Contract Liabilities - Activity Impacting Deferred Revenue (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2022
Change in Contract with Customer, Liability
Earned premium, net of ceded	$ 94,000			$ 248,800
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-10-01
Change in Contract with Customer, Liability
Revenue, remaining performance obligation, amount	$ 4,300			$ 4,300
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	12 months			12 months
ASC 606
Change in Contract with Customer, Liability
Beginning balance	$ 243,425	$ 198,857	$ 201,085	$ 201,085
Revenue recognized	(118,585)	(103,681)	(97,273)
Additional amounts deferred	152,776	142,543	95,045
Impact of acquisitions		5,706
Ending balance	277,616	243,425	198,857	277,616
ASC 606 | Vertical Software
Change in Contract with Customer, Liability
Beginning balance	4,241	4,257	3,814	3,814
Revenue recognized	(5,674)	(6,027)	(5,279)
Additional amounts deferred	5,733	5,815	5,722
Impact of acquisitions		196
Ending balance	4,300	4,241	4,257	4,300
ASC 606 | Insurance
Change in Contract with Customer, Liability
Beginning balance	239,184	194,600	197,271	197,271
Revenue recognized	(112,911)	(97,654)	(91,994)
Additional amounts deferred	147,043	136,728	89,323
Impact of acquisitions		5,510
Ending balance	$ 273,316	$ 239,184	$ 194,600	$ 273,316