Loans Held for Investment - Schedule of Restructured Loans by Type, Net of Individually Evaluated Allowances (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Jun. 30, 2022
Financing Receivable, Impaired [Line Items]
Restructured Loans, Allowance for Loan Losses	$ (38)	$ (38)
Restructured Loans, Unpaid Principal Balance	2,665	4,508
Restructured Loans, Related Charge-offs	0	0
Restructured Loans, Recorded Investment	2,665	4,508
Restructured loans, net investment	2,627	4,470
Mortgage loans, Single-family
Financing Receivable, Impaired [Line Items]
Restructured Loans, With Related Allowance, Unpaid Principal Balance	759	760
Restructured Loans, With Related Allowance, Related Charge-offs	0	0
Restructured Loans, With a Related Allowance, Recorded Investment	759	760
Restructured Loans, Allowance for Loan Losses	(38)	(38)
Restructured loans, with a related allowance, net investment	721	722
Restructured Loans, Without a Related Allowance, Unpaid Principal Balance	1,906	3,748
Restructured Loans, Without a Related Allowance, Related Charge-offs	0	0
Restructured Loans, Without a Related Allowance, Recorded Investment	1,906	3,748
Restructured Loans, Without a Related Allowance, Net Investment	1,906	3,748
Restructured Loans, Unpaid Principal Balance	2,665	4,508
Restructured Loans, Related Charge-offs	0	0
Restructured Loans, Recorded Investment	2,665	4,508
Restructured loans, net investment	$ 2,627	$ 4,470