Borrowings - Schedule of Borrowings (Detail) - USD ($) $ in Thousands	Mar. 31, 2022	Jun. 30, 2021
Debt Instrument [Line Items]
Short-term Debt	$ 851,220	$ 685,876
FHLB advances
Debt Instrument [Line Items]
Short-term Debt	541,220	665,876
Overnight borrowings
Debt Instrument [Line Items]
Short-term Debt	$ 310,000	$ 20,000

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