Financing Agreements - Lines of Credit - Trading Credit Facility - Additional Information (Details) - Trading Credit Facility - Line of Credit - USD ($)		3 Months Ended		6 Months Ended
	Dec. 21, 2021	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2025	Dec. 31, 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				3.90%
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]	us-gaap:SecuredOvernightFinancingRateSofrMember			us-gaap:SecuredOvernightFinancingRateSofrMember
Stated interest rate (in percentage)		6.30%		6.30%
Accumulated amortization of loan cost		$ 3,400,000		$ 3,400,000		$ 3,500,000
Variable rate basis				daily SOFR rate
Borrowings due on demand		300,000,000		$ 300,000,000		345,000,000
Borrowings available		122,500,000		122,500,000		$ 99,100,000
Line of credit facility, aggregate incremental facility		73,000,000		73,000,000
Line of credit facility amended increase in incremental facility				422,500,000
Interest expense		$ 6,700,000	$ 6,500,000	$ 13,600,000	$ 12,900,000
Percentage of total expense recognized		41.00%	63.20%	47.30%	63.50%
Effective rate of interest		7.90%	8.70%	8.50%	8.90%
Maximum
Debt Instrument [Line Items]
Line of credit, current borrowing capacity	$ 350,000,000