Loans - Schedule of Troubled Debt Restructurings With Payment Default (Details) $ in Thousands	12 Months Ended
Jun. 30, 2020 USD ($) loan	Jun. 30, 2019 USD ($) loan	Jun. 30, 2018 USD ($) loan
Financing Receivable, Modifications
Number of loans \| loan	1	2	5
Recorded investment \| $	$ 79	$ 74	$ 277
Other Troubled Debt Restructing [Member]
Financing Receivable, Modifications
Number of loans \| loan	1	2	5
Recorded investment \| $	$ 79	$ 74	$ 277
Retail Consumer Loans \| Other Troubled Debt Restructing [Member] \| One-to-four family
Financing Receivable, Modifications
Number of loans \| loan	0	1	5
Recorded investment \| $	$ 0	$ 72	$ 277
Retail Consumer Loans \| Other Troubled Debt Restructing [Member] \| Consumer
Financing Receivable, Modifications
Number of loans \| loan	0	1	0
Recorded investment \| $	$ 0	$ 2	$ 0
Commercial Loans \| Other Troubled Debt Restructing [Member] \| Construction and development
Financing Receivable, Modifications
Number of loans \| loan	1	0	0
Recorded investment \| $	$ 79	$ 0	$ 0

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- Definition

Number of financing receivable contracts modified as troubled debt restructuring within previous 12 months, with subsequent payment default.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953682-111524

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- Definition

Amount of financing receivable modified as troubled debt restructuring within previous 12 months, with subsequent payment default.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 34
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953682-111524

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