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Fair value measurements - Schedule of Level 3 Rollforward (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024
Financial assets |  |
Beginning Balance | $ 257,265 | $ 246,847
Purchases | 118,628 | 159,577
Sales and repayments | (176,171) | (185,816)
Net realized gain (loss) | (1,135) | 194
Included in income | 7,692 | (6,762)
Included in OCI | 370 | (1,565)
Transfer in | 75,621 | 44,790
Ending Balance | 282,270 | 257,265
Change in unrealized gains (losses) included in income on Level 3 assets and liabilities still held | 2,203 | (8,883)
Change in unrealized gains (losses) included in OCI on Level 3 assets and liabilities still held | 370 | (1,565)
Financial liabilities |  |
Beginning Balance | $ 1,471 |
Ending Balance |  | $ 1,471
Fair Value Recurring Basis Unobservable Input Reconciliation Asset Gain Loss Statement Of Income Extensible List Not Disclosed Flag | Included in income |
Fair Value Asset Recurring Basis Still Held Unrealized Gain Loss Statement Of Income Extensible List Not Disclosed Flag |  | Change in unrealized gains (losses) included in income on Level 3 assets and liabilities still held
Variable Interest Entity, Primary Beneficiary |  |
Financial assets |  |
Beginning Balance | $ 125,898 |
Ending Balance | 120,680 | $ 125,898
Consolidated Balance Including Variable Interest Entity |  |
Financial assets |  |
Beginning Balance | 256,766 | 245,177
Purchases | 112,599 | 159,577
Sales and repayments | (174,830) | (185,816)
Net realized gain (loss) | (1,135) | 194
Included in income | 6,310 | (5,591)
Included in OCI | 370 | (1,565)
Transfer in | 75,621 | 44,790
Ending Balance | 275,701 | 256,766
Change in unrealized gains (losses) included in income on Level 3 assets and liabilities still held | 792 | (7,712)
Change in unrealized gains (losses) included in OCI on Level 3 assets and liabilities still held | 370 | $ (1,565)
Financial liabilities |  |
Fair Value Recurring Basis Unobservable Input Reconciliation Asset Gain Loss Statement Of Other Comprehensive Income Extensible List Not Disclosed Flag |  | Included in OCI
Asset Management |  |
Financial assets |  |
Beginning Balance | 499 | $ 1,670
Purchases | 6,029 |
Sales and repayments | (1,341) |
Included in income | 1,382 | (1,171)
Ending Balance | 6,569 | 499
Change in unrealized gains (losses) included in income on Level 3 assets and liabilities still held | 1,411 | (1,171)
Financial liabilities |  |
Beginning Balance | 1,471 | 1,175
Sales and repayments | (132) |
Net realized gain (loss) |  | 296
Included in income | (1,339) | 0
Ending Balance | 0 | 1,471
Change in unrealized gains (losses) included in income on Level 3 assets and liabilities still held | $ 1,339 | (296)
Fair Value Recurring Basis Unobservable Input Reconciliation Liability Gain Loss Statement Of Income Extensible List Not Disclosed Flag | Included in income |
Asset Management | Debt obligations |  |
Financial liabilities |  |
Beginning Balance | $ 1,471 | 1,175
Sales and repayments | (132) |
Net realized gain (loss) |  | 296
Included in income | (1,339) | 0
Ending Balance | 0 | 1,471
Change in unrealized gains (losses) included in income on Level 3 assets and liabilities still held | 1,339 | (296)
Asset Management | Equity securities |  |
Financial assets |  |
Beginning Balance | 499 | 1,670
Purchases | 5,946 |
Sales and repayments | (1,341) |
Included in income | 1,380 | (1,171)
Ending Balance | 6,484 | 499
Change in unrealized gains (losses) included in income on Level 3 assets and liabilities still held | 1,409 | (1,171)
Asset Management | Other invested assets |  |
Financial assets |  |
Purchases | 72 |
Ending Balance | 72 |
Asset Management | Derivatives |  |
Financial assets |  |
Purchases | 11 |
Included in income | 2 |
Ending Balance | 13 |
Change in unrealized gains (losses) included in income on Level 3 assets and liabilities still held | 2 |
Insurance Solutions |  |
Financial assets |  |
Beginning Balance | 130,868 | 120,540
Purchases | 20,453 | 41,474
Sales and repayments | (78,533) | (69,950)
Net realized gain (loss) | (749) | 87
Included in income | 6,991 | (4,508)
Included in OCI | 370 | (1,565)
Transfer in | 75,621 | 44,790
Ending Balance | 155,021 | 130,868
Change in unrealized gains (losses) included in income on Level 3 assets and liabilities still held | 2,807 | (4,542)
Change in unrealized gains (losses) included in OCI on Level 3 assets and liabilities still held | 370 | (1,565)
Insurance Solutions | Consolidated Balance Including Variable Interest Entity |  |
Financial assets |  |
Beginning Balance | 256,766 |
Ending Balance | 275,701 | 256,766
Insurance Solutions | Corporate |  |
Financial assets |  |
Included in OCI | 149 |
Transfer in | 10,000 |
Ending Balance | 10,149 |
Change in unrealized gains (losses) included in OCI on Level 3 assets and liabilities still held | 149 |
Insurance Solutions | Equity securities |  |
Financial assets |  |
Beginning Balance | 2,918 | 3,107
Sales and repayments |  | (250)
Included in income | (43) | 61
Transfer in | 365 |
Ending Balance | 3,240 | 2,918
Change in unrealized gains (losses) included in income on Level 3 assets and liabilities still held | (43) | 61
Insurance Solutions | Equity securities | Variable Interest Entity, Primary Beneficiary |  |
Financial assets |  |
Beginning Balance | 141 | 0
Purchases | 825 | 131
Sales and repayments | (104) | 0
Included in income | 87 | 10
Ending Balance | 949 | 141
Change in unrealized gains (losses) included in income on Level 3 assets and liabilities still held | 88 | 10
Insurance Solutions | Asset and mortgage-backed securities |  |
Financial assets |  |
Beginning Balance | 8,641 | 2,240
Purchases | 756 |
Sales and repayments | (6,280) | (1,008)
Included in income | (59) | (3)
Included in OCI | 356 | (23)
Transfer in | 16,013 | 7,435
Ending Balance | 19,427 | 8,641
Change in unrealized gains (losses) included in OCI on Level 3 assets and liabilities still held | 356 | (23)
Insurance Solutions | Corporate loans |  |
Financial assets |  |
Beginning Balance | 114,734 | 104,588
Purchases | 19,678 | 41,474
Sales and repayments | (67,820) | (68,113)
Net realized gain (loss) | (4) | 85
Included in income | 1,858 | (655)
Transfer in | 48,122 | 37,355
Ending Balance | 116,568 | 114,734
Change in unrealized gains (losses) included in income on Level 3 assets and liabilities still held | 1,834 | (348)
Insurance Solutions | Corporate loans | Variable Interest Entity, Primary Beneficiary |  |
Financial assets |  |
Beginning Balance | 125,757 | 124,637
Purchases | 91,321 | 117,972
Sales and repayments | (96,193) | (115,866)
Net realized gain (loss) | (386) | 107
Included in income | (768) | (1,093)
Ending Balance | 119,731 | 125,757
Change in unrealized gains (losses) included in income on Level 3 assets and liabilities still held | (2,103) | (3,180)
Insurance Solutions | Other invested assets |  |
Financial assets |  |
Beginning Balance | 4,575 | 10,605
Purchases | 19 |
Sales and repayments | (4,433) | (579)
Net realized gain (loss) | (745) | 2
Included in income | 5,235 | (3,911)
Included in OCI | (135) | (1,542)
Transfer in | 1,121 |
Ending Balance | 5,637 | 4,575
Change in unrealized gains (losses) included in income on Level 3 assets and liabilities still held | 1,016 | (4,255)
Change in unrealized gains (losses) included in OCI on Level 3 assets and liabilities still held | $ (135) | $ (1,542)

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