Quarterly report [Sections 13 or 15(d)]

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

v3.25.3
Financing Agreements - Lines of Credit - Trading Credit Facility - Additional Information (Details) - Trading Credit Facility - Line of Credit - USD ($)
3 Months Ended
Dec. 21, 2021
Sep. 30, 2025
Sep. 30, 2024
Jun. 30, 2025
Debt Instrument [Line Items]        
Line of credit, maturity date Dec. 21, 2024 Sep. 30, 2027    
Applicable margin of basis points 2.36%      
Credit facility, interest rate at period end   4.20%    
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] us-gaap:SecuredOvernightFinancingRateSofrMember us-gaap:SecuredOvernightFinancingRateSofrMember    
Stated interest rate (in percentage)   6.60%    
Accumulated amortization of loan cost   $ 4,500,000   $ 3,500,000
Variable rate basis   daily SOFR rate    
Borrowings due on demand   $ 290,000,000   345,000,000
Borrowings available   102,200,000   $ 99,100,000
Line of credit facility, aggregate incremental facility   73,000,000    
Line of credit facility amended increase in incremental facility   422,500,000    
Interest expense   $ 7,000,000 $ 6,400,000  
Percentage of total expense recognized   55.50% 63.90%  
Effective rate of interest   9.10% 9.10%  
Maximum        
Debt Instrument [Line Items]        
Line of credit, current borrowing capacity $ 350,000,000