Goodwill and intangible assets - Schedule in Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Intangible assets — definite life
Total	$ 2,770
Asset Management
Intangible assets — definite life
Accumulated amortization	(8,381)	$ (4,808)
Accumulated impairment	(22,642)	(1,835)
Gross carrying amount	41,984	32,583
Net carrying amount	10,961	25,940
Asset Management \| Investment management contracts
Intangible assets — definite life
Gross carrying amount	11,544	13,379
Accumulated amortization	(8,381)	(4,808)
Accumulated impairment	(393)	(1,835)
Total	2,770	6,736
Insurance Solutions
Intangible assets — indefinite life
Intangible assets — indefinite life	2,444	2,444
Intangible assets — definite life
Net carrying amount	2,444	2,444
Investment management contracts \| Asset Management
Intangible assets — indefinite life
Gross carrying amount	19,204	19,204
Accumulated impairment	(19,204)
Intangible assets — indefinite life		19,204
Licensing Agreements \| Insurance Solutions
Intangible assets — indefinite life
Intangible assets — indefinite life	2,444	$ 2,444
Profit Sharing Interest \| Asset Management
Intangible assets — indefinite life
Gross carrying amount	11,236
Accumulated impairment	(3,045)
Intangible assets — indefinite life	$ 8,191

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