Loans Held For Investment Loans Held For Investment: Schedule of Past Due Status of Loans Held for Investment, Gross (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Held For Investment, Gross, Current	$ 886,301	$ 907,100
Loans Held For Investment, Gross, 30-89 Days Past Due	1,537	1,035
Loans Held For Investment, Gross, Non-Accrual	8,203	8,297
Loans Held For Investment, Gross	896,041	916,432	$ 881,035
Mortgage loans, Single-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Held For Investment, Gross, Current	304,173	313,146
Loans Held For Investment, Gross, 30-89 Days Past Due	1,537	1,035
Loans Held For Investment, Gross, Non-Accrual	8,127	8,016
Loans Held For Investment, Gross	313,837	322,197	316,595
Mortgage loans, Multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Held For Investment, Gross, Current	463,786	479,959
Loans Held For Investment, Gross, 30-89 Days Past Due	0	0
Loans Held For Investment, Gross, Non-Accrual	0	0
Loans Held For Investment, Gross	463,786	479,959	448,465
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Held For Investment, Gross, Current	103,366	97,361
Loans Held For Investment, Gross, 30-89 Days Past Due	0	0
Loans Held For Investment, Gross, Non-Accrual	0	201
Loans Held For Investment, Gross	103,366	97,562	98,044
Construction Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Held For Investment, Gross, Current	14,430	16,009
Loans Held For Investment, Gross, 30-89 Days Past Due	0	0
Loans Held For Investment, Gross, Non-Accrual	0	0
Loans Held For Investment, Gross	14,430	16,009	16,872
Mortgage Loans, Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Held For Investment, Gross			265
Commercial Business Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Held For Investment, Gross, Current	402	496
Loans Held For Investment, Gross, 30-89 Days Past Due	0	0
Loans Held For Investment, Gross, Non-Accrual	76	80
Loans Held For Investment, Gross	478	576	610
Consumer Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Held For Investment, Gross, Current	144	129
Loans Held For Investment, Gross, 30-89 Days Past Due	0	0
Loans Held For Investment, Gross, Non-Accrual	0	0
Loans Held For Investment, Gross	$ 144	$ 129	$ 184