v3.26.1
Goodwill and intangible assets - Narrative (Details) - USD ($)
$ in Thousands
 12 Months Ended
Oct. 01, 2025
Dec. 31, 2025
Dec. 31, 2024
Indefinite-Lived Intangible Assets [Line Items]      
Goodwill   $ 30,193 $ 55,697
Goodwill impairment   $ 25,504 0
Multi Year Guaranteed Annuities      
Indefinite-Lived Intangible Assets [Line Items]      
Reporting unit exceeded its respective carrying value percentage   30.60%  
Long-Term Care      
Indefinite-Lived Intangible Assets [Line Items]      
Goodwill impairment $ 25,500    
Asset Management      
Indefinite-Lived Intangible Assets [Line Items]      
Goodwill   $ 1,000 1,000
Insurance Solutions      
Indefinite-Lived Intangible Assets [Line Items]      
Goodwill   30,193 55,697
Goodwill impairment   25,504 0
Insurance Solutions | Multi Year Guaranteed Annuities      
Indefinite-Lived Intangible Assets [Line Items]      
Goodwill   30,193 30,193
Goodwill impairment   0  
Insurance Solutions | Long-Term Care      
Indefinite-Lived Intangible Assets [Line Items]      
Goodwill   0 $ 25,504
Goodwill impairment   $ 25,504