v3.26.1
Derivatives - Schedule of Forward Currency Contract, Fair Value (Details) - USD ($)
Jun. 30, 2026
Sep. 30, 2025
Offsetting Derivative Assets [Abstract]    
Collateral Pledged $ 0 $ 0
Regions Bank | Interest rate swaps    
Offsetting Derivative Assets [Abstract]    
Gross Amount of Recognized Assets 0 0
Gross Amount of Recognized (Liabilities) (8,003,000) (2,252,000)
Offsetting Derivative Liabilities [Abstract]    
Net amounts presented in the Consolidated Statements of Financial Condition (8,003,000) (2,252,000)
Collateral (Received) Pledged 0 0
Net Amounts (8,003,000) (2,252,000)
Regions Bank | Foreign currency forward contracts    
Offsetting Derivative Assets [Abstract]    
Gross Amount of Recognized Assets 1,623,000 388,000
Gross Amount of Recognized (Liabilities) (2,382,000) (6,019,000)
Offsetting Derivative Liabilities [Abstract]    
Net amounts presented in the Consolidated Statements of Financial Condition (759,000) (5,631,000)
Collateral (Received) Pledged 0 0
Net Amounts (759,000) (5,631,000)
SMBC Capital Markets, Inc. | Interest rate swaps    
Offsetting Derivative Assets [Abstract]    
Gross Amount of Recognized Assets 2,725,000 17,302,000
Gross Amount of Recognized (Liabilities) (9,337,000) 0
Net amounts presented in the Consolidated Statements of Financial Condition   17,302,000
Collateral Pledged   0
Net Amounts   17,302,000
Offsetting Derivative Liabilities [Abstract]    
Net amounts presented in the Consolidated Statements of Financial Condition (6,612,000)  
Collateral (Received) Pledged 0  
Net Amounts (6,612,000)  
SMBC Capital Markets, Inc. | Foreign currency forward contracts    
Offsetting Derivative Assets [Abstract]    
Gross Amount of Recognized Assets 49,000  
Gross Amount of Recognized (Liabilities) 0  
Net amounts presented in the Consolidated Statements of Financial Condition 49,000  
Collateral Pledged 0  
Net Amounts 49,000  
Macquarie Bank Limited | Interest rate swaps    
Offsetting Derivative Assets [Abstract]    
Gross Amount of Recognized Assets 320,000 1,425,000
Gross Amount of Recognized (Liabilities) (3,352,000) (869,000)
Net amounts presented in the Consolidated Statements of Financial Condition   556,000
Collateral Pledged   0
Net Amounts   556,000
Offsetting Derivative Liabilities [Abstract]    
Net amounts presented in the Consolidated Statements of Financial Condition (3,032,000)  
Collateral (Received) Pledged 0  
Net Amounts (3,032,000)  
Macquarie Bank Limited | Foreign currency forward contracts    
Offsetting Derivative Assets [Abstract]    
Gross Amount of Recognized Assets 605,000 0
Gross Amount of Recognized (Liabilities) 0 (853,000)
Net amounts presented in the Consolidated Statements of Financial Condition 605,000  
Collateral Pledged 0  
Net Amounts 605,000  
Offsetting Derivative Liabilities [Abstract]    
Net amounts presented in the Consolidated Statements of Financial Condition   (853,000)
Collateral (Received) Pledged   0
Net Amounts   (853,000)
Morgan Stanley Capital Services LLC | Interest rate swaps    
Offsetting Derivative Assets [Abstract]    
Gross Amount of Recognized Assets 606,000 4,286,000
Gross Amount of Recognized (Liabilities) 0 0
Net amounts presented in the Consolidated Statements of Financial Condition 606,000 4,286,000
Collateral Pledged 0 0
Net Amounts 606,000 4,286,000
Morgan Stanley Capital Services LLC | Foreign currency forward contracts    
Offsetting Derivative Assets [Abstract]    
Gross Amount of Recognized Assets 0 0
Gross Amount of Recognized (Liabilities) (1,641,000) (2,635,000)
Offsetting Derivative Liabilities [Abstract]    
Net amounts presented in the Consolidated Statements of Financial Condition (1,641,000) (2,635,000)
Collateral (Received) Pledged 0 0
Net Amounts (1,641,000) $ (2,635,000)
BNP Paribas | Interest rate swaps    
Offsetting Derivative Assets [Abstract]    
Gross Amount of Recognized Assets 0  
Gross Amount of Recognized (Liabilities) (3,107,000)  
Offsetting Derivative Liabilities [Abstract]    
Net amounts presented in the Consolidated Statements of Financial Condition (3,107,000)  
Collateral (Received) Pledged 0  
Net Amounts $ (3,107,000)