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Fair value measurements - Schedule of Fair Value Measurement Inputs and Valuation Techniques (Details) $ in Thousands | Dec. 31, 2025 USD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($)
--- | --- | --- | ---
Financial assets |  |  |
Level 3 Assets fair value | $ 282,270 | $ 257,265 | $ 246,847
Financial liabilities |  |  |
Total financial liabilities |  | 1,471 |
Variable Interest Entity, Primary Beneficiary |  |  |
Financial assets |  |  |
Level 3 Assets fair value | 120,680 | 125,898 |
Consolidated Balance Including Variable Interest Entity |  |  |
Financial assets |  |  |
Level 3 Assets fair value | 275,701 | 256,766 | 245,177
Asset Management |  |  |
Financial assets |  |  |
Level 3 Assets fair value | 6,569 | 499 | 1,670
Financial liabilities |  |  |
Debt obligation |  | 1,471 |
Total financial liabilities | 0 | 1,471 | 1,175
Insurance Solutions |  |  |
Financial assets |  |  |
Debt securities: | 405,621 | 388,907 |
Level 3 Assets fair value | 155,021 | 130,868 | $ 120,540
Insurance Solutions | Corporate |  |  |
Financial assets |  |  |
Debt securities: | 166,693 | 119,896 |
Insurance Solutions | Asset and mortgage-backed securities |  |  |
Financial assets |  |  |
Debt securities: | 221,524 | 253,934 |
Insurance Solutions | Consolidated Balance Including Variable Interest Entity |  |  |
Financial assets |  |  |
Level 3 Assets fair value | 275,701 | 256,766 |
Discounted cash flow |  |  |
Financial assets |  |  |
Other invested assets | 5,637 |  |
Discounted cash flow | Asset Management |  |  |
Financial assets |  |  |
Equity securities |  | 30 |
Discounted cash flow | Insurance Solutions |  |  |
Financial assets |  |  |
Equity securities | 3,000 | 2,918 |
Debt securities: |  | 8,588 |
Corporate loans | 116,568 | 113,062 |
Other invested assets |  | $ 4,575 |
Discounted cash flow | Insurance Solutions | Corporate |  |  |
Financial assets |  |  |
Debt securities: | 10,149 |  |
Discounted cash flow | Insurance Solutions | Asset and mortgage-backed securities |  |  |
Financial assets |  |  |
Debt securities: | 19,427 |  |
Discounted cash flow | Insurance Solutions | Minimum |  |  |
Financial assets |  |  |
Corporate loans, measurement input |  | 0.036 |
Discounted cash flow | Insurance Solutions | Maximum |  |  |
Financial assets |  |  |
Corporate loans, measurement input |  | 0.175 |
Discounted cash flow | Insurance Solutions | Weighted Average |  |  |
Financial assets |  |  |
Corporate loans, measurement input |  | 0.106 |
Discounted cash flow | Insurance Solutions | Variable Interest Entity, Primary Beneficiary |  |  |
Financial assets |  |  |
Equity securities |  | $ 141 |
Corporate loans | $ 89,608 | $ 75,172 |
Discounted cash flow | Discount rate | Asset Management | Minimum |  |  |
Financial assets |  |  |
Equity securities, measurement input |  | 0.220 |
Discounted cash flow | Discount rate | Asset Management | Maximum |  |  |
Financial assets |  |  |
Equity securities, measurement input |  | 0.270 |
Discounted cash flow | Discount rate | Asset Management | Weighted Average |  |  |
Financial assets |  |  |
Equity securities, measurement input |  | 0.245 |
Discounted cash flow | Discount rate | Insurance Solutions | Minimum |  |  |
Financial assets |  |  |
Equity securities, measurement input | 0.0561 | 0.101 |
Debt securities, measurement input |  | 0.057 |
Corporate loans, measurement input | 0 |  |
Other invested assets , measurement input | 9.57% | 14.90% |
Discounted cash flow | Discount rate | Insurance Solutions | Minimum | Corporate |  |  |
Financial assets |  |  |
Debt securities, measurement input | 0.0736 |  |
Discounted cash flow | Discount rate | Insurance Solutions | Minimum | Asset and mortgage-backed securities |  |  |
Financial assets |  |  |
Debt securities, measurement input | 0.0629 |  |
Discounted cash flow | Discount rate | Insurance Solutions | Maximum |  |  |
Financial assets |  |  |
Equity securities, measurement input | 0.0561 | 0.101 |
Debt securities, measurement input |  | 0.093 |
Corporate loans, measurement input | 0.1569 |  |
Other invested assets , measurement input | 19.72% | 19.30% |
Discounted cash flow | Discount rate | Insurance Solutions | Maximum | Corporate |  |  |
Financial assets |  |  |
Debt securities, measurement input | 0.0892 |  |
Discounted cash flow | Discount rate | Insurance Solutions | Maximum | Asset and mortgage-backed securities |  |  |
Financial assets |  |  |
Debt securities, measurement input | 0.0853 |  |
Discounted cash flow | Discount rate | Insurance Solutions | Weighted Average |  |  |
Financial assets |  |  |
Equity securities, measurement input | 0.0561 | 0.101 |
Debt securities, measurement input |  | 0.080 |
Corporate loans, measurement input | 0.0816 |  |
Other invested assets , measurement input | 16.87% | 18.40% |
Discounted cash flow | Discount rate | Insurance Solutions | Weighted Average | Corporate |  |  |
Financial assets |  |  |
Debt securities, measurement input | 0.0814 |  |
Discounted cash flow | Discount rate | Insurance Solutions | Weighted Average | Asset and mortgage-backed securities |  |  |
Financial assets |  |  |
Debt securities, measurement input | 0.0755 |  |
Discounted cash flow | Discount rate | Insurance Solutions | Variable Interest Entity, Primary Beneficiary | Minimum |  |  |
Financial assets |  |  |
Equity securities, measurement input |  | 0.1437 |
Corporate loans, measurement input | 0.0526 | 0.043 |
Discounted cash flow | Discount rate | Insurance Solutions | Variable Interest Entity, Primary Beneficiary | Maximum |  |  |
Financial assets |  |  |
Equity securities, measurement input |  | 0.1437 |
Corporate loans, measurement input | 0.1483 | 0.171 |
Discounted cash flow | Discount rate | Insurance Solutions | Variable Interest Entity, Primary Beneficiary | Weighted Average |  |  |
Financial assets |  |  |
Equity securities, measurement input |  | 0.1437 |
Corporate loans, measurement input | 0.0963 | 0.067 |
Enterprise value | Asset Management |  |  |
Financial assets |  |  |
Equity securities | $ 6,409 | $ 469 |
Financial liabilities |  |  |
Debt obligation |  | 1,471 |
Enterprise value | Insurance Solutions |  |  |
Financial assets |  |  |
Equity securities | 210 |  |
Corporate loans |  | $ 1,672 |
Enterprise value | Insurance Solutions | Variable Interest Entity, Primary Beneficiary |  |  |
Financial assets |  |  |
Equity securities | $ 949 |  |
Enterprise value | Discount rate | Insurance Solutions | Variable Interest Entity, Primary Beneficiary | Minimum |  |  |
Financial assets |  |  |
Equity securities, measurement input | 10 |  |
Enterprise value | Discount rate | Insurance Solutions | Variable Interest Entity, Primary Beneficiary | Maximum |  |  |
Financial assets |  |  |
Equity securities, measurement input | 16 |  |
Enterprise value | Discount rate | Insurance Solutions | Variable Interest Entity, Primary Beneficiary | Weighted Average |  |  |
Financial assets |  |  |
Equity securities, measurement input | 13 |  |
Enterprise value | Enterprise Value, Multiple | Asset Management | Minimum |  |  |
Financial assets |  |  |
Equity securities, measurement input | 12.5 | 5.13 |
Enterprise value | Enterprise Value, Multiple | Asset Management | Maximum |  |  |
Financial assets |  |  |
Equity securities, measurement input | 13.5 | 6.13 |
Enterprise value | Enterprise Value, Multiple | Asset Management | Weighted Average |  |  |
Financial assets |  |  |
Equity securities, measurement input | 13 | 5.63 |
Enterprise value | Enterprise Value, Multiple | Insurance Solutions | Minimum |  |  |
Financial assets |  |  |
Equity securities, measurement input | 0.63 |  |
Corporate loans, measurement input |  | 0.3 |
Enterprise value | Enterprise Value, Multiple | Insurance Solutions | Maximum |  |  |
Financial assets |  |  |
Equity securities, measurement input | 0.63 |  |
Corporate loans, measurement input |  | 8.25 |
Enterprise value | Enterprise Value, Multiple | Insurance Solutions | Weighted Average |  |  |
Financial assets |  |  |
Equity securities, measurement input | 0.63 |  |
Corporate loans, measurement input |  | 8.04 |
Recent transaction | Insurance Solutions |  |  |
Financial assets |  |  |
Equity securities | $ 30 |  |
Debt securities: |  | $ 53 |
Recent transaction | Insurance Solutions | Variable Interest Entity, Primary Beneficiary |  |  |
Financial assets |  |  |
Corporate loans | 30,123 | $ 50,585 |
Market approach | Asset Management |  |  |
Financial assets |  |  |
Equity securities | 75 |  |
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 | 1.1620 |  |
Option pricing model | Valuation Technique, Volatility | Asset Management | Maximum |  |  |
Financial assets |  |  |
Equity securities, measurement input | 1.2620 |  |
Option pricing model | Valuation Technique, Volatility | Asset Management | Weighted Average |  |  |
Financial assets |  |  |
Equity securities, measurement input | 1.2120 |  |
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 |  |
Probability-Weighted Expected Return Method | Asset Management |  |  |
Financial assets |  |  |
Other invested assets | $ 72 |  |
Probability-Weighted Expected Return Method | Independent probabilities | Asset Management | Minimum |  |  |
Financial assets |  |  |
Other invested assets , measurement input | 5.00% |  |
Probability-Weighted Expected Return Method | Independent probabilities | Asset Management | Maximum |  |  |
Financial assets |  |  |
Other invested assets , measurement input | 5.00% |  |
Probability-Weighted Expected Return Method | Independent probabilities | Asset Management | Weighted Average |  |  |
Financial assets |  |  |
Other invested assets , measurement input | 5.00% |  |
Probability-Weighted Expected Return Method Dependent Probabilities | Dependent Probabilities | Asset Management | Minimum |  |  |
Financial assets |  |  |
Other invested assets , measurement input | 2.40% |  |
Probability-Weighted Expected Return Method Dependent Probabilities | Dependent Probabilities | Asset Management | Maximum |  |  |
Financial assets |  |  |
Other invested assets , measurement input | 3.70% |  |
Probability-Weighted Expected Return Method Dependent Probabilities | Dependent Probabilities | Asset Management | Weighted Average |  |  |
Financial assets |  |  |
Other invested assets , measurement input | 3.10% |  |
Probability-Weighted Expected Return Method Years To Cash Flows | Years To Cash Flows | Asset Management | Minimum |  |  |
Financial assets |  |  |
Other invested assets , measurement input | 250.00% |  |
Probability-Weighted Expected Return Method Years To Cash Flows | Years To Cash Flows | Asset Management | Maximum |  |  |
Financial assets |  |  |
Other invested assets , measurement input | 450.00% |  |
Probability-Weighted Expected Return Method Years To Cash Flows | Years To Cash Flows | Asset Management | Weighted Average |  |  |
Financial assets |  |  |
Other invested assets , measurement input | 350.00% |  |

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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Name Accounting Standards Codification -Section 55 -Paragraph 10 -SubTopic 10 -Topic 825 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482881/825-10-55-10 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482736/825-10-45-1A Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-11 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-11 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-10 Reference 9: http://www.xbrl.org/2003/role/exampleRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482881/825-10-55-12 Reference 10: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 103 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-103 Reference 11: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 100 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-100 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (aa) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 Reference 14: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481830/320-10-45-1 Reference 15: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(6)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 16: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479130/326-30-45-1 + Details
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- Definition Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482736/825-10-45-1A Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-11 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-11 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-10 Reference 8: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 100 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-100 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 10: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 80 -Name Accounting Standards Codification -Section 55 -Paragraph 14 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480078/944-80-55-14 Reference 11: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 80 -Name Accounting Standards Codification -Section 55 -Paragraph 9 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480078/944-80-55-9 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(1)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(1)(6)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 + Details
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