v3.26.3
Equities - Schedule of Preferred Stock Dividends (Details) - $ / shares
 12 Months Ended
Aug. 31, 2026
Aug. 31, 2025
Aug. 31, 2024
8% Cumulative Redeemable      
Class of Stock [Line Items]      
Dividend Rate (as a percent) 8.00%    
Annual Dividend Per Share (in dollars per share) $ 2.00 $ 2.00 $ 2.00
Class B Cumulative Redeemable, Series 1      
Class of Stock [Line Items]      
Dividend Rate (as a percent) 7.875%    
Annual Dividend Per Share (in dollars per share) $ 1.97 1.97 1.97
Class B Reset Rate Cumulative Redeemable, Series 2      
Class of Stock [Line Items]      
Dividend Rate (as a percent) 7.10%    
Annual Dividend Per Share (in dollars per share) $ 1.78 1.78 1.78
Class B Reset Rate Cumulative Redeemable, Series 3      
Class of Stock [Line Items]      
Dividend Rate (as a percent) 6.75%    
Annual Dividend Per Share (in dollars per share) $ 1.69 1.69 1.69
Class B Cumulative Redeemable, Series 4      
Class of Stock [Line Items]      
Dividend Rate (as a percent) 7.50%    
Annual Dividend Per Share (in dollars per share) $ 1.88 $ 1.88 $ 1.88