v3.26.1
Investments - ISLP Balance Sheet (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Mar. 31, 2025
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Investments at fair value $ 2,470,798 $ 2,508,441  
Cash and cash equivalents 12,973 23,092  
Foreign cash 3,622 3,151 $ 28,188
Collateral on forward currency exchange contracts 4,760 12,907  
Deferred financing costs 3,285 3,543  
Unrealized appreciation on forward currency exchange contracts 224 0  
Interest receivable on investments 35,091 38,023  
Total Assets 2,601,676 2,662,585  
Debt [1] 1,454,657 1,470,796  
Interest payable on debt 10,910 12,376  
Payable for investments purchased 3,527 2,110  
Unrealized depreciation on forward currency exchange contracts 2,739 9,061  
Distributions payable to members 0 9,730  
Accounts payable and accrued expenses 16,825 12,910  
Total liabilities 1,508,121 1,545,175  
Total members' equity 1,093,555 1,117,410  
Total Liabilities and Total Net Assets 2,601,676 2,662,585  
Investments, amortized cost 2,482,858 2,502,667  
Foreign cash, cost 3,026 2,477  
International Senior Loan Program, LLC      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Investments at fair value 711,887 733,104  
Cash and cash equivalents 3,715 15,565  
Foreign cash 5,945 9,607  
Collateral on forward currency exchange contracts 5 3  
Deferred financing costs 3,017 3,196  
Unrealized appreciation on forward currency exchange contracts 232 15  
Interest receivable on investments 13,839 14,831  
Other receivable 0 237  
Total Assets 738,640 776,558  
Debt 372,540 381,361  
Subordinated notes payable to members 304,369 305,655  
Interest payable on debt 907 942  
Interest payable on subordinated notes payable to members 8,892 18,984  
Payable for investments purchased 470 0  
Unrealized depreciation on forward currency exchange contracts 3,889 2,338  
Distributions payable to members 1,337 1,712  
Accounts payable and accrued expenses 1,193 1,115  
Total liabilities 693,597 712,107  
Total members' equity 45,043 64,451  
Total Liabilities and Total Net Assets 738,640 776,558  
Investments, amortized cost 744,599 739,567  
Foreign cash, cost 5,929 10,095  
Accumulated amortization $ 4,073 $ 3,897  
[1] Carrying value represents aggregate principal amount outstanding less unamortized debt issuance costs.