Stock Based Compensation - Unrecognized Compensation Costs Related to Non-vested Awards (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($)
Subsidiary Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost, subsidiary Stock options	$ 16,963
Weighted - average recognition period (in years)	2 years 1 month 6 days
Subsidiary Stock options | Fortegra Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost, subsidiary Stock options	$ 16,963
Restricted stock awards and RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	$ 3,059
Weighted - average recognition period (in years)	9 months 18 days
Restricted stock awards and RSUs | Fortegra Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost, subsidiary Stock options	$ 1,772
Performance Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	$ 16,911
Weighted - average recognition period (in years)	1 year 6 months
Performance Restricted Stock Units | Fortegra Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost, subsidiary Stock options	$ 513