BORROWINGS - Schedule of Borrowings (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Jun. 30, 2025
Debt Instrument [Line Items]
Borrowings	$ 1,060,000	$ 1,256,491
Fair value of collateral	4,500,000
Overnight borrowings
Debt Instrument [Line Items]
Borrowings	160,000	150,000
FHLB advances
Debt Instrument [Line Items]
Borrowings	900,000	1,106,491
Line of Credit \| Overnight borrowings \| FHLB Overnight Line of Credit Borrowings
Debt Instrument [Line Items]
Borrowings	160,000	150,000
Total Fixed-Rate Advances
Debt Instrument [Line Items]
Borrowings	$ 900,000	$ 1,106,491

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details