v3.26.1
Fair value measurements - Schedule Of Gains Losses From Credit Risks (Details) - Insurance Solutions - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Fair Value, Option, Changes in Fair Value, Gain (Loss) $ 4,751 $ (4,178)
Corporate loans    
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Fair Value, Option, Changes in Fair Value, Gain (Loss) 1,200 75
Other invested assets    
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Fair Value, Option, Changes in Fair Value, Gain (Loss) 3,551 (4,253)
Variable Interest Entity, Primary Beneficiary    
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Fair Value, Option, Changes in Fair Value, Gain (Loss) (915) (863)
Consolidated Balance Including Variable Interest Entity    
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Fair Value, Option, Changes in Fair Value, Gain (Loss) $ 3,836 $ (5,041)