Organization and Summary of Significant Accounting Policies - Cash and Cash Equivalents (Details) - USD ($) $ in Millions	9 Months Ended
	Mar. 31, 2025	Jun. 30, 2024
Cash and Cash Equivalents [Line Items]
Securities purchased under agreements to resell	$ 25.3	$ 0.0
Term of interest bearing deposits	3 years
Interest-bearing deposits in other depository institutions
Cash and Cash Equivalents [Line Items]
Cash	$ 172.7	7.7
Deposits are held in various commercial banks
Cash and Cash Equivalents [Line Items]
Cash	$ 1.8	$ 2.3