Loans Held For Investment: Schedule of Average Recorded Investment in Non-Performing Loans and Related Interest Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Non-performing Loans, with No Related Allowance, Average Recorded Investment	$ 7,301	$ 7,833	$ 7,693	$ 8,148
Non-performing Loans, with No Related Allowance, Interest Income	0	1	148	37
Non-performing Loans, with Related Allowance, Average Recorded Investment	862	2,758	685	2,887
Non-performing Loans, with Related Allowance, Interest Income	10	33	22	66
Average investment in non-performing loans	8,163	10,591	8,378	11,035
Non-performing Loans, Interest Income	10	34	170	103
Mortgage loans, Single-family
Non-performing Loans, with No Related Allowance, Average Recorded Investment	7,301	7,458	7,659	7,771
Non-performing Loans, with No Related Allowance, Interest Income	0	1	135	37
Non-performing Loans, with Related Allowance, Average Recorded Investment	786	2,578	608	2,517
Non-performing Loans, with Related Allowance, Interest Income	8	19	19	46
Mortgage loans, Multi-family
Non-performing Loans, with No Related Allowance, Average Recorded Investment	0	375	0	377
Non-performing Loans, with No Related Allowance, Interest Income	0	0	0	0
Non-performing Loans, with Related Allowance, Average Recorded Investment	0	92	0	279
Non-performing Loans, with Related Allowance, Interest Income	0	12	0	17
Commercial Real Estate [Member]
Non-performing Loans, with No Related Allowance, Average Recorded Investment			34	0
Non-performing Loans, with No Related Allowance, Interest Income			13	0
Commercial Business Loans
Non-performing Loans, with Related Allowance, Average Recorded Investment	76	88	77	91
Non-performing Loans, with Related Allowance, Interest Income	$ 2	$ 2	$ 3	$ 3