Quarterly report pursuant to Section 13 or 15(d)

Financing Agreements - Lines of Credit - Trading Credit Facility - Additional Information (Details)

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Financing Agreements - Lines of Credit - Trading Credit Facility - Additional Information (Details) - Trading Credit Facility - Line of Credit - USD ($)
3 Months Ended 9 Months Ended
Dec. 21, 2021
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2023
Mar. 31, 2022
Jun. 30, 2022
Debt Instrument [Line Items]            
Line of credit facility term 3 years          
Line of credit, termination date Dec. 21, 2024          
Stated interest rate (in percentage)   7.20%   7.20%    
Accumulated amortization of loan cost   $ 2,800,000   $ 2,800,000   $ 3,400,000
Variable rate basis       daily SOFR rate    
Credit facility, interest rate at period end   4.90%   4.90%    
Borrowings due on demand   $ 230,000,000.0   $ 230,000,000.0   215,000,000.0
Borrowings available   120,000,000.0   120,000,000.0   $ 122,000,000.0
Interest expense   $ 5,100,000 $ 1,900,000 $ 11,100,000 $ 6,200,000  
Percentage of total expense recognized   54.80% 34.70% 49.00% 37.90%  
Effective rate of interest   7.46% 3.18% 6.79% 3.42%  
Maximum            
Debt Instrument [Line Items]            
Line of credit, current borrowing capacity $ 350,000,000.0          
Minimum            
Debt Instrument [Line Items]            
Lender holding percentage of revolving commitments       66.67%    
SOFR            
Debt Instrument [Line Items]            
Applicable margin of basis points 2.36%