Debt obligations - Schedule of Ability Surplus Notes Outstanding (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2026	Dec. 31, 2025
Debt Instrument [Line Items]
Par value	$ 90,752	$ 76,252
Carrying value of note	92,194
Subordinated Debt
Debt Instrument [Line Items]
Par value	17,250	17,250
Carrying value of note	$ 17,250	$ 17,250
Sentinel Security Life Insurance Company | Subordinated Debt
Debt Instrument [Line Items]
Interest rate	5.00%	5.00%
Par value	$ 2,250	$ 2,250
Carrying value of note	$ 2,250	$ 2,250
Revol One Insurance Company (formerly known as Pavonia Life Insurance Company of Michigan) | Subordinated Debt
Debt Instrument [Line Items]
Interest rate	10.00%	10.00%
Par value	$ 12,000	$ 12,000
Carrying value of note	$ 12,000	$ 12,000
Atlantic Coast Life Insurance Company | Subordinated Debt
Debt Instrument [Line Items]
Variable rate	6.00%	6.00%
Par value	$ 3,000	$ 3,000
Carrying value of note	$ 3,000	$ 3,000