BORROWINGS - Schedule of Borrowings (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Jun. 30, 2022
Debt Instrument [Line Items]
Short-term Debt	$ 1,611,692	$ 901,337
FHLB advances
Debt Instrument [Line Items]
Short-term Debt	1,156,692	651,337
Overnight borrowings
Debt Instrument [Line Items]
Short-term Debt	455,000	$ 250,000
Overnight borrowings \| Line of Credit
Debt Instrument [Line Items]
Short-term Debt	385,000
Overnight borrowings \| Unsecured Debt
Debt Instrument [Line Items]
Short-term Debt	$ 70,000

Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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Name:	us-gaap_ShortTermBorrowings
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant