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Repurchase Agreements - Additional Information (Detail) - USD ($)	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Assets Sold under Agreements to Repurchase [Line Items]
Maximum amount of outstanding agreements	$ 3,939,000	$ 2,840,000
Repurchase agreement monthly average amount	3,398,000	2,400,000
Repurchase agreements	3,738,000	$ 2,015,000
Maturity Overnight [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase agreements	2,000,000
Maturity 30 to 90 Days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase agreements	$ 1,700,000
Maximum [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase agreements term	90 days
Minimum [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase agreements term	30 days

X

- Definition

Repurchase agreement term period.

+ References

No definition available.

+ Details

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- Definition

Securities sold under repurchase agreements average balance.

+ References

No definition available.

+ Details

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- Definition

Securities sold under repurchase agreements maximum balance.

+ References

No definition available.

+ Details

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- Definition

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.

+ References

No definition available.

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- Definition

Carrying value, as of the balance sheet date, of securities sold under agreements to repurchase where the transferor maintains effective control over the assets, accounting for them as secured debt.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 10
-Section 55
-Paragraph 51
-URI http://asc.fasb.org/extlink&oid=116647374&loc=d3e101761-111710

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(m)(1)(i))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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