Net investment income (Details) - Insurance Solutions - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2026	Mar. 31, 2025
Net Investment Income [Line Items]
Gross investment income:	$ 17,655	$ 17,759
Investment expense	(979)	(2,808)
Net investment income	20,220	18,850
Consolidated Entity, Excluding Consolidated VIE
Net Investment Income [Line Items]
Net investment income	16,676	14,951
Variable Interest Entity, Primary Beneficiary
Net Investment Income [Line Items]
Gross investment income:	3,747	4,034
Investment expense	(203)	(135)
Net investment income	3,544	3,899
Debt securities
Net Investment Income [Line Items]
Gross investment income:	10,984	13,034
Corporate loans
Net Investment Income [Line Items]
Gross investment income:	3,117	1,699
Derivative income (expense)
Net Investment Income [Line Items]
Derivative income (expense)	(58)	(436)
Mortgage loans
Net Investment Income [Line Items]
Gross investment income:	2,590	2,826
Equity securities
Net Investment Income [Line Items]
Gross investment income:	141	176
Other
Net Investment Income [Line Items]
Gross investment income:	$ 881	$ 460

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

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Amount, before investment expense, of income earned from investments in securities and real estate. Includes, but is not limited to, real estate investment, policy loans, dividends, and interest. Excludes realized gain (loss) on investments.

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