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Note 5 - Derivative Instruments (Tables) | 6 Months Ended
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Jun. 30, 2025
Notes Tables |
Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block] |
|  | Notional value |
|  | June 30, 2025 |  |  | December 31, 2024 |
Futures and contracts for difference |  | $ | 1,564.1 |  |  | $ | 789.0 |
Credit default swaps |  |  | 150.3 |  |  |  | 148.5 |
Total return swaps |  |  | 65.8 |  |  |  | 69.7 |
Foreign currency forward contracts |  |  | 295.4 |  |  |  | 328.2 |
TBAs |  |  | 39.0 |  |  |  | 9.1 |
|  | Notional value |
|  | June 30, 2025 |  |  | December 31, 2024 |
Futures and contracts for difference |  | $ | 634.5 |  |  | $ | 160.5 |
Credit default swaps |  |  | 8.1 |  |  |  | 4.3 |
Total return swaps |  |  | 26.3 |  |  |  | 10.3 |
Interest rate swaps |  |  | 14.7 |  |  |  | 13.9 |
Foreign currency forward contracts |  |  | 264.7 |  |  |  | 196.6 |
Other |  |  | 1.6 |  |  |  | — |
|  | Notional value |
|  | June 30, 2025 |  |  | December 31, 2024 |
Foreign currency forward contracts and swaps |  | $ | 43.0 |  |  | $ | 38.4 |
Derivative Instruments, Gain (Loss) [Table Text Block] |
|  | Three months ended |  |  | Six months ended |
|  | June 30, |  |  | June 30, |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Futures and contracts for difference |  | $ | (20.8 | ) |  | $ | 2.9 |  |  | $ | (23.1 | ) |  | $ | (5.8 | )
Credit default swaps |  |  | (1.2 | ) |  |  | (0.1 | ) |  |  | (0.6 | ) |  |  | (1.5 | )
Total return swaps |  |  | (7.1 | ) |  |  | (1.3 | ) |  |  | (5.5 | ) |  |  | (5.9 | )
Foreign currency forward contracts and swaps |  |  | 3.2 |  |  |  | (1.8 | ) |  |  | 5.4 |  |  |  | 0.9 |
TBAs |  |  | (0.4 | ) |  |  | 0.1 |  |  |  | (0.4 | ) |  |  | 0.4 |
Total gains (losses) from derivative instruments |  | $ | (26.3 | ) |  | $ | (0.2 | ) |  | $ | (24.2 | ) |  | $ | (11.9 | )
Schedule of Derivative Instruments [Table Text Block] |
|  | Fair value |
|  | June 30, 2025 |  |  | December 31, 2024 |
Derivative liabilities |  | $ | 14.0 |  |  | $ | 8.5 |

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- Definition Tabular disclosure of the location and amount of derivative instruments and nonderivative instruments designated as hedging instruments reported before netting adjustments, and the amount of gain (loss) on derivative instruments and nonderivative instruments designated and qualified as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4CC -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4CC Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4C -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4C Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4A -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4A -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4E -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4E + Details
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- Definition Tabular disclosure of pertinent information about a derivative or group of derivatives on a disaggregated basis, such as for individual instruments, or small groups of similar instruments. May include a combination of the type of instrument, risks being hedged, notional amount, hedge designation, related hedged item, inception date, maturity date, or other relevant item. + References No definition available. + Details
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- Definition Tabular disclosure of the notional amounts of outstanding derivative positions. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1A -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-1A + Details
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