v3.26.1
Investments - Schedule of Investments at Fair Value and Amortized Cost (Details) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Schedule of Investments [Line Items]    
Amortized Cost $ 5,388,045 [1],[2],[3],[4] $ 6,206,603 [5],[6],[7],[8]
Fair Value 5,217,369 [1],[3] 6,207,136 [5],[7]
First-lien senior secured debt investments    
Schedule of Investments [Line Items]    
Amortized Cost 4,677,079 5,488,669
Fair Value 4,557,893 5,484,795
Second-lien senior secured debt investments    
Schedule of Investments [Line Items]    
Amortized Cost 253,123 283,730
Fair Value 201,125 267,441
Unsecured debt investments    
Schedule of Investments [Line Items]    
Amortized Cost 62,534 66,248
Fair Value 62,454 66,531
Preferred equity investments    
Schedule of Investments [Line Items]    
Amortized Cost 182,633 177,173
Fair Value 171,367 173,230
Common equity investments    
Schedule of Investments [Line Items]    
Amortized Cost 90,882 80,256
Fair Value 100,585 101,617
Specialty finance equity investments    
Schedule of Investments [Line Items]    
Amortized Cost 105,282 86,202
Fair Value 108,651 89,389
Joint Ventures    
Schedule of Investments [Line Items]    
Amortized Cost 16,512 24,325
Fair Value $ 15,294 $ 24,133
[1] Certain portfolio company investments are subject to contractual restrictions on sales. Refer to footnote 30 for additional information on our restricted securities.
[2] The amortized cost represents the original cost adjusted for the amortization or accretion of premium or discount, as applicable, on debt investments using the effective interest method.
[3] Unless otherwise indicated, the Company’s portfolio companies are pledged as collateral supporting the amounts outstanding under the Company’s Amended and Restated Senior Secured Revolving Credit Agreement (the “Revolving Credit Facility”) and credit facilities to which certain of the Company’s subsidiaries are parties (the “SPV Asset Facilities” and the “CLOs”). See “Note 5 — Debt.”
[4] As of March 31, 2026, the net estimated unrealized loss for U.S. federal income tax purposes was $116.3 million based on a tax cost basis of $5.3 billion. As of March 31, 2026, the aggregate gross unrealized losses for U.S federal income tax purposes was $156.3 million and the estimated aggregate gross unrealized gain for U.S. federal income tax purposes was $40.0 million.
[5] Certain portfolio company investments are subject to contractual restrictions on sales. Refer to footnote 30 for additional information on our restricted securities.
[6] The amortized cost represents the original cost adjusted for the amortization or accretion of premium or discount, as applicable, on debt investments using the effective interest method.
[7] Unless otherwise indicated, the Company’s portfolio companies are pledged as collateral supporting the amounts outstanding under the Company’s Amended and Restated Senior Secured Revolving Credit Agreement (the “Revolving Credit Facility”) and credit facilities to which certain of the Company’s subsidiaries are parties (the “SPV Asset Facilities” and the “CLOs”). See “Note 5 — Debt.”
[8] As of December 31, 2025, the net estimated unrealized gain for U.S. federal income tax purposes was $52.3 million based on a tax cost basis of $6.2 billion. As of December 31, 2025, the aggregate gross unrealized losses for U.S federal income tax purposes was$7.3 million and the estimated aggregate gross unrealized gain for U.S. federal income tax purposes was $59.6 million.