v3.26.3
Fair Value Measurement and Disclosures - Summarize the Valuation of The Company's Investments and Cash and Cash Equivalents in The Fair Value Hierarchy Levels (Details) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Investments, Fair Value Disclosure [Abstract]    
Asset Backed Debt Securities $ 1,376,067 $ 943,100
Equity & Other Investments 625,067 634,605
Total Investments, at fair value 2,001,134 1,577,705
Derivative Assets At Fair Value [Abstract]    
Total Derivative Assets, at fair value 46,882 46,042
Derivative Liabilities at Fair Value [Abstract]    
Total Derivative Liabilities, at fair value 17,253 4,986
Total 2,030,763 1,618,761
Credit Default Swaps    
Derivative Assets At Fair Value [Abstract]    
Total Derivative Assets, at fair value 40,603 44,653
Derivative Liabilities at Fair Value [Abstract]    
Total Derivative Liabilities, at fair value 363 30
Interest Rate Swaps    
Derivative Assets At Fair Value [Abstract]    
Total Derivative Assets, at fair value   1,389
Derivative Liabilities at Fair Value [Abstract]    
Total Derivative Liabilities, at fair value 16,870  
Swaptions    
Derivative Assets At Fair Value [Abstract]    
Total Derivative Assets, at fair value 18  
Derivative Liabilities at Fair Value [Abstract]    
Total Derivative Liabilities, at fair value 20  
Forward Currency Contracts    
Derivative Assets At Fair Value [Abstract]    
Total Derivative Assets, at fair value 6,261  
Derivative Liabilities at Fair Value [Abstract]    
Total Derivative Liabilities, at fair value   935
Futures Contracts    
Derivative Liabilities at Fair Value [Abstract]    
Total Derivative Liabilities, at fair value   4,021
Investments at NAV    
Investments, Fair Value Disclosure [Abstract]    
Equity & Other Investments 442,663 381,089
Total Investments, at fair value 442,663 381,089
Derivative Liabilities at Fair Value [Abstract]    
Total 442,663 381,089
Level I    
Derivative Liabilities at Fair Value [Abstract]    
Total Derivative Liabilities, at fair value   4,021
Total   (4,021)
Level I | Futures Contracts    
Derivative Liabilities at Fair Value [Abstract]    
Total Derivative Liabilities, at fair value   4,021
Level II    
Investments, Fair Value Disclosure [Abstract]    
Asset Backed Debt Securities 142,784 171,415
Equity & Other Investments 1,500 1,850
Total Investments, at fair value 144,284 173,265
Derivative Assets At Fair Value [Abstract]    
Total Derivative Assets, at fair value 6,279 1,389
Derivative Liabilities at Fair Value [Abstract]    
Total Derivative Liabilities, at fair value 17,253 965
Total 133,310 173,689
Level II | Credit Default Swaps    
Derivative Liabilities at Fair Value [Abstract]    
Total Derivative Liabilities, at fair value 363 30
Level II | Interest Rate Swaps    
Derivative Assets At Fair Value [Abstract]    
Total Derivative Assets, at fair value   1,389
Derivative Liabilities at Fair Value [Abstract]    
Total Derivative Liabilities, at fair value 16,870  
Level II | Swaptions    
Derivative Assets At Fair Value [Abstract]    
Total Derivative Assets, at fair value 18  
Derivative Liabilities at Fair Value [Abstract]    
Total Derivative Liabilities, at fair value 20  
Level II | Forward Currency Contracts    
Derivative Assets At Fair Value [Abstract]    
Total Derivative Assets, at fair value 6,261  
Derivative Liabilities at Fair Value [Abstract]    
Total Derivative Liabilities, at fair value   935
Level III    
Investments, Fair Value Disclosure [Abstract]    
Asset Backed Debt Securities 1,233,283 771,685
Equity & Other Investments 180,904 251,666
Total Investments, at fair value 1,414,187 1,023,351
Derivative Assets At Fair Value [Abstract]    
Total Derivative Assets, at fair value 40,603 44,653
Derivative Liabilities at Fair Value [Abstract]    
Total 1,454,790 1,068,004
Level III | Credit Default Swaps    
Derivative Assets At Fair Value [Abstract]    
Total Derivative Assets, at fair value 40,603 44,653
Series I    
Investments, Fair Value Disclosure [Abstract]    
Asset Backed Debt Securities 215,231 182,791
Equity & Other Investments 97,767 122,998
Total Investments, at fair value 312,998 305,789
Derivative Assets At Fair Value [Abstract]    
Total Derivative Assets, at fair value 7,333 8,924
Derivative Liabilities at Fair Value [Abstract]    
Total Derivative Liabilities, at fair value 2,699 966
Total 317,632 313,747
Series I | Credit Default Swaps    
Derivative Assets At Fair Value [Abstract]    
Total Derivative Assets, at fair value 6,351 8,655
Derivative Liabilities at Fair Value [Abstract]    
Total Derivative Liabilities, at fair value 57 6
Series I | Interest Rate Swaps    
Derivative Assets At Fair Value [Abstract]    
Total Derivative Assets, at fair value   269
Derivative Liabilities at Fair Value [Abstract]    
Total Derivative Liabilities, at fair value 2,639  
Series I | Swaptions    
Derivative Assets At Fair Value [Abstract]    
Total Derivative Assets, at fair value 3  
Derivative Liabilities at Fair Value [Abstract]    
Total Derivative Liabilities, at fair value 3  
Series I | Forward Currency Contracts    
Derivative Assets At Fair Value [Abstract]    
Total Derivative Assets, at fair value 979  
Derivative Liabilities at Fair Value [Abstract]    
Total Derivative Liabilities, at fair value   181
Series I | Futures Contracts    
Derivative Liabilities at Fair Value [Abstract]    
Total Derivative Liabilities, at fair value   779
Series I | Investments at NAV    
Investments, Fair Value Disclosure [Abstract]    
Equity & Other Investments 69,237 73,862
Total Investments, at fair value 69,237 73,862
Derivative Liabilities at Fair Value [Abstract]    
Total 69,237 73,862
Series I | Level I    
Derivative Liabilities at Fair Value [Abstract]    
Total Derivative Liabilities, at fair value   779
Total   (779)
Series I | Level I | Futures Contracts    
Derivative Liabilities at Fair Value [Abstract]    
Total Derivative Liabilities, at fair value   779
Series I | Level II    
Investments, Fair Value Disclosure [Abstract]    
Asset Backed Debt Securities 22,332 33,223
Equity & Other Investments 235 359
Total Investments, at fair value 22,567 33,582
Derivative Assets At Fair Value [Abstract]    
Total Derivative Assets, at fair value 982 269
Derivative Liabilities at Fair Value [Abstract]    
Total Derivative Liabilities, at fair value 2,699 187
Total 20,850 33,664
Series I | Level II | Credit Default Swaps    
Derivative Liabilities at Fair Value [Abstract]    
Total Derivative Liabilities, at fair value 57 6
Series I | Level II | Interest Rate Swaps    
Derivative Assets At Fair Value [Abstract]    
Total Derivative Assets, at fair value   269
Derivative Liabilities at Fair Value [Abstract]    
Total Derivative Liabilities, at fair value 2,639  
Series I | Level II | Swaptions    
Derivative Assets At Fair Value [Abstract]    
Total Derivative Assets, at fair value 3  
Derivative Liabilities at Fair Value [Abstract]    
Total Derivative Liabilities, at fair value 3  
Series I | Level II | Forward Currency Contracts    
Derivative Assets At Fair Value [Abstract]    
Total Derivative Assets, at fair value 979  
Derivative Liabilities at Fair Value [Abstract]    
Total Derivative Liabilities, at fair value   181
Series I | Level III    
Investments, Fair Value Disclosure [Abstract]    
Asset Backed Debt Securities 192,899 149,568
Equity & Other Investments 28,295 48,777
Total Investments, at fair value 221,194 198,345
Derivative Assets At Fair Value [Abstract]    
Total Derivative Assets, at fair value 6,351 8,655
Derivative Liabilities at Fair Value [Abstract]    
Total 227,545 207,000
Series I | Level III | Credit Default Swaps    
Derivative Assets At Fair Value [Abstract]    
Total Derivative Assets, at fair value 6,351 8,655
Series II    
Investments, Fair Value Disclosure [Abstract]    
Asset Backed Debt Securities 1,160,836 760,309
Equity & Other Investments 527,300 511,607
Total Investments, at fair value 1,688,136 1,271,916
Derivative Assets At Fair Value [Abstract]    
Total Derivative Assets, at fair value 39,549 37,118
Derivative Liabilities at Fair Value [Abstract]    
Total Derivative Liabilities, at fair value 14,554 4,020
Total 1,713,130 1,305,014
Series II | Credit Default Swaps    
Derivative Assets At Fair Value [Abstract]    
Total Derivative Assets, at fair value 34,252 35,998
Derivative Liabilities at Fair Value [Abstract]    
Total Derivative Liabilities, at fair value 306 24
Series II | Interest Rate Swaps    
Derivative Assets At Fair Value [Abstract]    
Total Derivative Assets, at fair value   1,120
Derivative Liabilities at Fair Value [Abstract]    
Total Derivative Liabilities, at fair value 14,231  
Series II | Swaptions    
Derivative Assets At Fair Value [Abstract]    
Total Derivative Assets, at fair value 15  
Derivative Liabilities at Fair Value [Abstract]    
Total Derivative Liabilities, at fair value 17  
Series II | Forward Currency Contracts    
Derivative Assets At Fair Value [Abstract]    
Total Derivative Assets, at fair value 5,282  
Derivative Liabilities at Fair Value [Abstract]    
Total Derivative Liabilities, at fair value   754
Series II | Futures Contracts    
Derivative Liabilities at Fair Value [Abstract]    
Total Derivative Liabilities, at fair value   3,242
Series II | Investments at NAV    
Investments, Fair Value Disclosure [Abstract]    
Equity & Other Investments 373,426 307,227
Total Investments, at fair value 373,426 307,227
Derivative Liabilities at Fair Value [Abstract]    
Total 373,426 307,227
Series II | Level I    
Derivative Liabilities at Fair Value [Abstract]    
Total Derivative Liabilities, at fair value   3,242
Total   (3,242)
Series II | Level II    
Investments, Fair Value Disclosure [Abstract]    
Asset Backed Debt Securities 120,452 138,192
Equity & Other Investments 1,265 1,491
Total Investments, at fair value 121,717 139,683
Derivative Assets At Fair Value [Abstract]    
Total Derivative Assets, at fair value 5,297 1,120
Derivative Liabilities at Fair Value [Abstract]    
Total Derivative Liabilities, at fair value 14,554 778
Total 112,460 140,025
Series II | Level II | Credit Default Swaps    
Derivative Liabilities at Fair Value [Abstract]    
Total Derivative Liabilities, at fair value 306 24
Series II | Level II | Interest Rate Swaps    
Derivative Assets At Fair Value [Abstract]    
Total Derivative Assets, at fair value   1,120
Derivative Liabilities at Fair Value [Abstract]    
Total Derivative Liabilities, at fair value 14,231  
Series II | Level II | Swaptions    
Derivative Assets At Fair Value [Abstract]    
Total Derivative Assets, at fair value 15  
Derivative Liabilities at Fair Value [Abstract]    
Total Derivative Liabilities, at fair value 17  
Series II | Level II | Forward Currency Contracts    
Derivative Assets At Fair Value [Abstract]    
Total Derivative Assets, at fair value 5,282  
Derivative Liabilities at Fair Value [Abstract]    
Total Derivative Liabilities, at fair value   754
Series II | Level II | Futures Contracts    
Derivative Liabilities at Fair Value [Abstract]    
Total Derivative Liabilities, at fair value   3,242
Series II | Level III    
Investments, Fair Value Disclosure [Abstract]    
Asset Backed Debt Securities 1,040,384 622,117
Equity & Other Investments 152,609 202,889
Total Investments, at fair value 1,192,993 825,006
Derivative Assets At Fair Value [Abstract]    
Total Derivative Assets, at fair value 34,252 35,998
Derivative Liabilities at Fair Value [Abstract]    
Total 1,227,245 861,004
Series II | Level III | Credit Default Swaps    
Derivative Assets At Fair Value [Abstract]    
Total Derivative Assets, at fair value $ 34,252 $ 35,998