v3.26.1
Significant Accounting Policies (Details)
 12 Months Ended
Feb. 10, 2026
Jan. 17, 2025
Dec. 27, 2024
Oct. 30, 2020
Aug. 03, 2020
Jun. 30, 2026
USD ($)
investment
Jun. 30, 2025
USD ($)
investment
Jun. 30, 2024
USD ($)
Oct. 30, 2025
Sep. 30, 2021
May 27, 2021
Mar. 01, 2019
Temporary Equity [Line Items]                        
Interest Income           $ 581,932,000 $ 671,109,000 $ 770,312,000        
Qualifying assets           81.94% 85.27%          
Number of asset going through foreclosure | investment           0 0          
Total assets at fair value are in non-accrual status           0.70% 0.30%          
Excise tax expense           $ 0            
Registration expenses           $ 0 $ 0          
Time dividends have remained unpaid           2 years 2 years          
5.50% Preferred Stock                        
Temporary Equity [Line Items]                        
Dividend rate         5.50% 5.50% 5.50%          
Dividend rate 5.50%     5.50% 5.50% 5.50% 5.50%          
6.50% Preferred Stock                        
Temporary Equity [Line Items]                        
Dividend rate       6.50% 6.50% 6.50% 6.50%          
Dividend rate         6.50% 6.50% 6.50%          
5.35% Series A Preferred Stock                        
Temporary Equity [Line Items]                        
Dividend rate           5.35%            
7.50% Preferred Stock                        
Temporary Equity [Line Items]                        
Dividend rate     7.50%   7.50% 7.50%            
Dividend rate   7.50%       7.50% 7.50%          
5.50% 2030 Notes                        
Temporary Equity [Line Items]                        
Stated rate           5.50%     5.50%      
5.50% 2030 Notes | Unsecured Debt                        
Temporary Equity [Line Items]                        
Stated rate           5.50%     5.50%      
2025 Notes | Convertible Notes                        
Temporary Equity [Line Items]                        
Stated rate             6.375%         6.375%
3.364% 2026 Notes                        
Temporary Equity [Line Items]                        
Stated rate           3.364%            
3.364% 2026 Notes | Unsecured Debt                        
Temporary Equity [Line Items]                        
Stated rate           3.364% 3.364%       3.364%  
3.364% 2026 Notes | Convertible Notes                        
Temporary Equity [Line Items]                        
Stated rate           3.364%            
3.437% 2028 Notes                        
Temporary Equity [Line Items]                        
Stated rate           3.437%            
3.437% 2028 Notes | Unsecured Debt                        
Temporary Equity [Line Items]                        
Stated rate           3.437% 3.437%     3.437%    
Control investments                        
Temporary Equity [Line Items]                        
Interest Income           $ 280,909,000 $ 281,307,000