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Summary Of Significant Accounting Policies of Tax Treatment of Common Dividends Per Share for Federal Tax Purposes (Details) - $ / shares
 3 Months Ended 12 Months Ended
Oct. 31, 2024
Jul. 31, 2024
Apr. 30, 2024
Jan. 30, 2024
Oct. 31, 2023
Jul. 31, 2023
Apr. 28, 2023
Jan. 30, 2023
Oct. 31, 2022
Jul. 29, 2022
Apr. 29, 2022
Jan. 28, 2022
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 18, 2024
Summary Of Significant Accounting Policies [Line Items]                                    
Dividends treatment for federal tax purposes.                             $ 3.65 [1] $ 4.16 [2] $ 3.95 [3]  
Dividends Treatment For Federal Tax Purposes, Percentage                             100.00% 100.00% 100.00%  
Distributions Payable, Amount Per Unit                                   $ 0.98
Dividends, Per Unit, Cash Paid $ 0.98 $ 0.98 $ 0.98 $ 0.98 $ 0.98 $ 0.98 $ 0.98 $ 0.98 $ 0.98 $ 0.98 $ 0.98 $ 0.98            
Ordinary income                                    
Summary Of Significant Accounting Policies [Line Items]                                    
Dividends treatment for federal tax purposes.                             $ 3.22 $ 3.04 $ 3.42  
Dividends Treatment For Federal Tax Purposes, Percentage                             88.29% 72.98% 86.60%  
Capital Gain Income                                    
Summary Of Significant Accounting Policies [Line Items]                                    
Dividends treatment for federal tax purposes.                             $ 0.03 $ 1.12 $ 0.53  
Dividends Treatment For Federal Tax Purposes, Percentage                             0.79% 27.02% 13.40%  
Return of Capital                                    
Summary Of Significant Accounting Policies [Line Items]                                    
Dividends treatment for federal tax purposes.                             $ 0.40 $ 0 $ 0  
Dividends Treatment For Federal Tax Purposes, Percentage                             10.92% 0.00% 0.00%  
Dividend Declared                                    
Summary Of Significant Accounting Policies [Line Items]                                    
Distributions Payable, Amount Per Unit                             $ 0.98      
Dividend Paid [Member]                                    
Summary Of Significant Accounting Policies [Line Items]                                    
Dividends, Per Unit, Cash Paid                         $ 0.98 $ 0.98        
Dividend Paid [Member] | Tax Year 2024                                    
Summary Of Significant Accounting Policies [Line Items]                                    
Dividends, Per Unit, Cash Paid                         0.71          
Dividend Paid [Member] | Tax Year 2023                                    
Summary Of Significant Accounting Policies [Line Items]                                    
Dividends, Per Unit, Cash Paid                         $ 0.27 0.95        
Dividend Paid [Member] | Tax Year 2022                                    
Summary Of Significant Accounting Policies [Line Items]                                    
Dividends, Per Unit, Cash Paid                           $ 0.03        
[1] The fourth quarter 2024 regular quarterly dividend was $0.98 per common share, all of which were allocable to 2025.
[2] The fourth quarter 2023 regular quarterly dividend was $0.98 per common share, of which approximately $0.27 per common share was allocated to 2023 and approximately $0.71 per common share was allocated to 2024.
[3] The fourth quarter 2022 regular quarterly dividend was $0.98 per common share, of which approximately $0.03 per common share was allocated to 2022 and approximately $0.95 per common share was allocated to 2023.