Loans Held for Investment - Schedule of Total Recorded Investment in Non-Performing Loans by Type (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020
Financing Receivable, Allowance for Credit Losses [Line Items]
Related Allowance	$ (434)	$ (442)
Recorded Investment, with No Related Allowance, Net		4,924
Unpaid Principal Balance	5,428	5,833
Related Charge-Offs	462	467
Recorded Investment	4,966	5,366
Recorded Investment, Net of Allowance	4,532
Mortgage loans, Single-family
Financing Receivable, Allowance for Credit Losses [Line Items]
With a related allowance Unpaid Principal Balance	3,352	3,289
With Related Allowance, Related Charge-Offs		0
With Related Allowance, Recorded Investment	3,352	3,289
Related Allowance	(430)	(438)
Recorded Investment, with Related Allowance, Net	2,922	2,851
Without a related allowance, Unpaid Principal Balance	2,045	2,509
With No Related Allowance, Related Charge-Offs	(462)	(467)
With No Related Allowance, Recorded Investment	1,583	2,042
Recorded Investment, with No Related Allowance, Net	1,583	2,042
Unpaid Principal Balance	5,397	5,798
Related Charge-Offs	462	467
Recorded Investment	4,935	5,331
Recorded Investment, Net of Allowance	4,505	4,893
Commercial business loans
Financing Receivable, Allowance for Credit Losses [Line Items]
With a related allowance Unpaid Principal Balance	31	35
With Related Allowance, Related Charge-Offs		0
With Related Allowance, Recorded Investment	31	35
Related Allowance	(4)	(4)
Recorded Investment, with Related Allowance, Net	27
Recorded Investment, with No Related Allowance, Net		31
Unpaid Principal Balance	31	35
Related Charge-Offs		0
Recorded Investment	31	35
Recorded Investment, Net of Allowance	$ 27	$ 31

Impaired Financing Receivable, Recorded Investment, Net of Allowance

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