Loans Held for Investment - Schedule of Recorded Investment in Non-Performing Loans (Details) - USD ($) $ in Thousands	3 Months Ended
Sep. 30, 2020	Sep. 30, 2019	Jun. 30, 2020
With related allowances, Interest Income Recognized	$ 41	$ 13
With related allowances, Average Recorded Investment	3,542	1,244
Recorded Investment	4,966		$ 5,366
Related Allowance	(434)		$ (442)
Non-performing loans, Net Investment	4,532
Without related allowances, Interest Income Recognized	0	116
Without related allowances, Average Recorded Investment	1,883	4,170
Impaired Financing Receivable, Interest Income, Accrual Method	41	129
Impaired Financing Receivable, Average Recorded Investment	5,425	5,414
Mortgage loans, Single-family
With related allowances, Interest Income Recognized	40	12
With related allowances, Average Recorded Investment	3,510	1,198
Without related allowances, Interest Income Recognized	0	116
Without related allowances, Average Recorded Investment	1,883	3,086
Commercial business loans
With related allowances, Interest Income Recognized	1	1
With related allowances, Average Recorded Investment	32	46
Construction
Without related allowances, Interest Income Recognized	0	0
Without related allowances, Average Recorded Investment	$ 0	$ 1,084

Impaired Financing Receivable, Recorded Investment, Net of Allowance

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- Definition

Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
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- Definition

Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

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Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
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Amount of allowance for credit losses related to recorded investment.

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Amount of average investment of impaired financing receivables for which there is no related allowance for credit losses.

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-Publisher FASB
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-URI http://asc.fasb.org/extlink&oid=121611835&loc=d3e5212-111524

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Amount of interest income, recognized on accrual basis, on financing receivables that are recognized as impaired, for which there is no related allowance for credit losses.

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Amount of interest income, recognized on accrual basis, on financing receivables, for which there is a related allowance for credit losses and are recognized as impaired.

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