v3.26.1
Fair value measurements - Schedule of Fair Value Measurement Inputs and Valuation Techniques (Details)
$ in Thousands
Jun. 30, 2026
USD ($)
Mar. 31, 2026
USD ($)
Dec. 31, 2025
USD ($)
Jun. 30, 2025
USD ($)
Mar. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Financial assets            
Total financial assets $ 300,990 $ 323,930 $ 282,270 $ 295,985 $ 282,589 $ 257,265
Variable Interest Entity, Primary Beneficiary            
Financial assets            
Total financial assets 130,722   120,680      
Consolidated Balance Including Variable Interest Entity            
Financial assets            
Total financial assets 294,682 317,219 275,701 290,136 277,217 256,766
Asset Management            
Financial assets            
Total financial assets 6,308 6,711 6,569 5,849 5,372 499
Insurance Solutions            
Financial assets            
Debt securities 391,431   405,621      
Total financial assets 163,960 $ 186,909 155,021 $ 161,083 $ 144,824 $ 130,868
Insurance Solutions | Asset and mortgage-backed securities            
Financial assets            
Debt securities 205,610   221,524      
Insurance Solutions | Corporate            
Financial assets            
Debt securities 169,892   166,693      
Insurance Solutions | Consolidated Balance Including Variable Interest Entity            
Financial assets            
Total financial assets 294,682   275,701      
Equity value | Asset Management            
Financial assets            
Equity securities $ 6,162          
Equity value | Equity and enterprise value, multiple | Asset Management | Minimum            
Financial assets            
Equity securities, measurement input 8.5          
Equity value | Equity and enterprise value, multiple | Asset Management | Maximum            
Financial assets            
Equity securities, measurement input 10.5          
Equity value | Equity and enterprise value, multiple | Asset Management | Weighted Average            
Financial assets            
Equity securities, measurement input 9.5          
Market approach | Asset Management            
Financial assets            
Equity securities $ 75   75      
Probability-Weighted Expected Return Method | Asset Management            
Financial assets            
Other invested assets $ 71   $ 72      
Probability-Weighted Expected Return Method | Independent probabilities | Asset Management | Minimum            
Financial assets            
Equity securities, measurement input     0.050      
Other invested assets , measurement input 5.00%          
Probability-Weighted Expected Return Method | Independent probabilities | Asset Management | Maximum            
Financial assets            
Equity securities, measurement input     0.050      
Other invested assets , measurement input 5.00%          
Probability-Weighted Expected Return Method | Independent probabilities | Asset Management | Weighted Average            
Financial assets            
Equity securities, measurement input     0.050      
Other invested assets , measurement input 5.00%          
Probability-Weighted Expected Return Method | Dependent probabilities | Asset Management | Minimum            
Financial assets            
Equity securities, measurement input     0.024      
Other invested assets , measurement input 2.40%          
Probability-Weighted Expected Return Method | Dependent probabilities | Asset Management | Maximum            
Financial assets            
Equity securities, measurement input     0.037      
Other invested assets , measurement input 3.70%          
Probability-Weighted Expected Return Method | Dependent probabilities | Asset Management | Weighted Average            
Financial assets            
Equity securities, measurement input     0.031      
Other invested assets , measurement input 3.10%          
Probability-Weighted Expected Return Method | Years to exit | Asset Management | Minimum            
Financial assets            
Equity securities, measurement input     2.5      
Other invested assets , measurement input 250.00%          
Probability-Weighted Expected Return Method | Years to exit | Asset Management | Maximum            
Financial assets            
Equity securities, measurement input     4.5      
Other invested assets , measurement input 450.00%          
Probability-Weighted Expected Return Method | Years to exit | Asset Management | Weighted Average            
Financial assets            
Equity securities, measurement input     3.5      
Other invested assets , measurement input 350.00%          
Discounted cash flow            
Financial assets            
Other invested assets $ 4,749          
Discounted cash flow | Insurance Solutions            
Financial assets            
Equity securities     $ 3,000      
Other invested assets     5,637      
Corporate loans 108,536   116,568      
Discounted cash flow | Insurance Solutions | Asset and mortgage-backed securities            
Financial assets            
Debt securities 40,373   19,427      
Discounted cash flow | Insurance Solutions | Corporate            
Financial assets            
Debt securities 10,001   10,149      
Discounted cash flow | Insurance Solutions | Variable Interest Entity, Primary Beneficiary            
Financial assets            
Equity securities     949      
Corporate loans $ 104,385   $ 89,608      
Discounted cash flow | Discount rate | Insurance Solutions | Minimum            
Financial assets            
Equity securities, measurement input     0.056      
Other invested assets , measurement input 14.20%   9.60%      
Corporate loans, measurement input (0.004)   0      
Discounted cash flow | Discount rate | Insurance Solutions | Minimum | Asset and mortgage-backed securities            
Financial assets            
Debt securities, measurement input 0.054   0.063      
Discounted cash flow | Discount rate | Insurance Solutions | Minimum | Corporate            
Financial assets            
Debt securities, measurement input 0.065   0.074      
Discounted cash flow | Discount rate | Insurance Solutions | Maximum            
Financial assets            
Equity securities, measurement input     0.056      
Other invested assets , measurement input 19.20%   19.70%      
Corporate loans, measurement input 0.157   0.157      
Discounted cash flow | Discount rate | Insurance Solutions | Maximum | Asset and mortgage-backed securities            
Financial assets            
Debt securities, measurement input 0.093   0.085      
Discounted cash flow | Discount rate | Insurance Solutions | Maximum | Corporate            
Financial assets            
Debt securities, measurement input 0.081   0.089      
Discounted cash flow | Discount rate | Insurance Solutions | Weighted Average            
Financial assets            
Equity securities, measurement input     0.056      
Other invested assets , measurement input 13.50%   16.90%      
Corporate loans, measurement input 0.087   0.082      
Discounted cash flow | Discount rate | Insurance Solutions | Weighted Average | Asset and mortgage-backed securities            
Financial assets            
Debt securities, measurement input 0.085   0.076      
Discounted cash flow | Discount rate | Insurance Solutions | Weighted Average | Corporate            
Financial assets            
Debt securities, measurement input 0.073   0.081      
Discounted cash flow | Discount rate | Insurance Solutions | Variable Interest Entity, Primary Beneficiary | Minimum            
Financial assets            
Equity securities, measurement input     10.0      
Corporate loans, measurement input 0.051   0.053      
Discounted cash flow | Discount rate | Insurance Solutions | Variable Interest Entity, Primary Beneficiary | Maximum            
Financial assets            
Equity securities, measurement input     16.0      
Corporate loans, measurement input 0.239   0.148      
Discounted cash flow | Discount rate | Insurance Solutions | Variable Interest Entity, Primary Beneficiary | Weighted Average            
Financial assets            
Equity securities, measurement input     13.0      
Corporate loans, measurement input 0.103   0.096      
Enterprise value | Asset Management            
Financial assets            
Equity securities     $ 6,409      
Enterprise value | Insurance Solutions            
Financial assets            
Equity securities $ 271   $ 210      
Enterprise value | Insurance Solutions | Variable Interest Entity, Primary Beneficiary            
Financial assets            
Equity securities $ 1,116          
Enterprise value | Equity and enterprise value, multiple | Asset Management | Minimum            
Financial assets            
Equity securities, measurement input     12.5      
Enterprise value | Equity and enterprise value, multiple | Asset Management | Maximum            
Financial assets            
Equity securities, measurement input     13.5      
Enterprise value | Equity and enterprise value, multiple | Asset Management | Weighted Average            
Financial assets            
Equity securities, measurement input     13.0      
Enterprise value | Equity and enterprise value, multiple | Insurance Solutions | Minimum            
Financial assets            
Equity securities, measurement input 0.1   0.6      
Enterprise value | Equity and enterprise value, multiple | Insurance Solutions | Maximum            
Financial assets            
Equity securities, measurement input 0.1   0.6      
Enterprise value | Equity and enterprise value, multiple | Insurance Solutions | Weighted Average            
Financial assets            
Equity securities, measurement input 0.1   0.6      
Enterprise value | Equity and enterprise value, multiple | Insurance Solutions | Variable Interest Entity, Primary Beneficiary | Minimum            
Financial assets            
Equity securities, measurement input 3.4          
Enterprise value | Equity and enterprise value, multiple | Insurance Solutions | Variable Interest Entity, Primary Beneficiary | Maximum            
Financial assets            
Equity securities, measurement input 10.1          
Enterprise value | Equity and enterprise value, multiple | Insurance Solutions | Variable Interest Entity, Primary Beneficiary | Weighted Average            
Financial assets            
Equity securities, measurement input 8.0          
Option pricing model | Asset Management            
Financial assets            
Equity securities     $ 13      
Option pricing model | Valuation Technique, Volatility | Asset Management | Minimum            
Financial assets            
Equity securities, measurement input     1.162      
Option pricing model | Valuation Technique, Volatility | Asset Management | Maximum            
Financial assets            
Equity securities, measurement input     1.262      
Option pricing model | Valuation Technique, Volatility | Asset Management | Weighted Average            
Financial assets            
Equity securities, measurement input     1.212      
Option Pricing Model Years To Exercise | Valuation Technique, Years To Exercise | Asset Management | Minimum            
Financial assets            
Equity securities, measurement input     0.1      
Option Pricing Model Years To Exercise | Valuation Technique, Years To Exercise | Asset Management | Maximum            
Financial assets            
Equity securities, measurement input     0.3      
Option Pricing Model Years To Exercise | Valuation Technique, Years To Exercise | Asset Management | Weighted Average            
Financial assets            
Equity securities, measurement input     0.2      
Recent transaction | Insurance Solutions            
Financial assets            
Equity securities $ 30   $ 30      
Recent transaction | Insurance Solutions | Variable Interest Entity, Primary Beneficiary            
Financial assets            
Corporate loans $ 25,221   $ 30,123