Loans Receivable Held for Investment, Aging of Recorded Investment in Past Due Loans by Loan Type (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	$ 0	$ 18
Current	363,344	401,011
Gross loans receivable	363,344	401,029
30-59 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	18
60-89 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Greater than 90 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Real Estate [Member] | Single Family [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	18
Current	48,357	73,094
Gross loans receivable	48,357	73,112
Real Estate [Member] | Single Family [Member] | 30-59 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	18
Real Estate [Member] | Single Family [Member] | 60-89 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Real Estate [Member] | Single Family [Member] | Greater than 90 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Real Estate [Member] | Multi-Family [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Current	273,864	289,043
Gross loans receivable	273,864	289,043
Real Estate [Member] | Multi-Family [Member] | 30-59 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Real Estate [Member] | Multi-Family [Member] | 60-89 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Real Estate [Member] | Multi-Family [Member] | Greater than 90 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Real Estate [Member] | Commercial Real Estate [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Current	24,322	14,818
Gross loans receivable	24,322	14,818
Real Estate [Member] | Commercial Real Estate [Member] | 30-59 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Real Estate [Member] | Commercial Real Estate [Member] | 60-89 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Real Estate [Member] | Commercial Real Estate [Member] | Greater than 90 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Real Estate [Member] | Church [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Current	16,308	20,648
Gross loans receivable	16,308	20,648
Real Estate [Member] | Church [Member] | 30-59 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Real Estate [Member] | Church [Member] | 60-89 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Real Estate [Member] | Church [Member] | Greater than 90 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Real Estate [Member] | Construction [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Current	430	3,125
Gross loans receivable	430	3,125
Real Estate [Member] | Construction [Member] | 30-59 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Real Estate [Member] | Construction [Member] | 60-89 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Real Estate [Member] | Construction [Member] | Greater than 90 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Commercial - Other [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Current	56	262
Gross loans receivable	56	262
Commercial - Other [Member] | 30-59 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Commercial - Other [Member] | 60-89 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Commercial - Other [Member] | Greater than 90 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Consumer [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Current	7	21
Gross loans receivable	7	21
Consumer [Member] | 30-59 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Consumer [Member] | 60-89 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Consumer [Member] | Greater than 90 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	$ 0	$ 0