v3.25.2
Portfolio Investments - Composition of Investment Portfolio (Details) - USD ($)
$ in Thousands
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2023
Schedule of Investments [Line Items]      
Cost $ 6,693,501 $ 7,447,174  
Fair Value 6,673,516 [1] 7,718,243 [2]  
First Lien, Unitranche      
Schedule of Investments [Line Items]      
Cost 201,585 22,359 $ 49,625
Fair Value 166,464 22,413 $ 48,332
First Lien Revolving Line of Credit      
Schedule of Investments [Line Items]      
Cost 83,721 87,589  
Fair Value 81,551 86,544  
First Lien Debt      
Schedule of Investments [Line Items]      
Cost 4,636,795 4,686,107  
Fair Value 4,381,227 4,569,467  
Second Lien Revolving Line of Credit      
Schedule of Investments [Line Items]      
Cost 0 5,147  
Fair Value 0 4,987  
Second Lien Debt      
Schedule of Investments [Line Items]      
Cost 965,712 1,219,482  
Fair Value 765,806 1,038,882  
Unsecured Debt      
Schedule of Investments [Line Items]      
Cost 7,200 7,200  
Fair Value 5,403 7,200  
Subordinated Structured Notes      
Schedule of Investments [Line Items]      
Cost 37,840 623,700  
Fair Value 35,002 531,690  
Equity      
Schedule of Investments [Line Items]      
Cost 962,233 817,949 [3]  
Fair Value $ 1,404,527 [4] $ 1,479,473 [3]  
[1] Fair value is determined by or under the direction of our Board of Directors. Unless otherwise indicated by endnote 42 below, all of our investments are valued using significant unobservable inputs. In accordance with ASC 820, such investments are classified as Level 3 within the fair value hierarchy. See Notes 2 and 3 within the accompanying notes to consolidated financial statements for further discussion.
[2] Fair value is determined by or under the direction of our Board of Directors. Unless otherwise indicated by endnote 42 below, all of our investments are valued using significant unobservable inputs. In accordance with ASC 820, such investments are classified as Level 3 within the fair value hierarchy. See Notes 2 and 3 within the accompanying notes to consolidated financial statements for further discussion.
[3] Equity, unless specifically stated otherwise, includes our investments in preferred stock, common stock, membership interests, net profits interests, net operating income interests, net revenue interests, overriding royalty interests, escrows receivable, and warrants.
[4]     Equity, unless specifically stated otherwise, includes our investments in preferred stock, common stock, membership interests, net profits interests, net operating income interests, net revenue interests, overriding royalty interests, escrows receivable, and warrants.