Loans Held For Investment Loans Held For Investment: Schedule of Allowance For Loan Losses and Recorded Investment in Gross Loans, by Portfolio Type (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Jun. 30, 2017
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance at beginning of period	$ 8,063	$ 8,725	$ 8,039	$ 8,670
(Recovery) provision for loan losses	11	350	158	(500)
Recoveries	48	39	132	310
Allowance for Loan and Lease Losses Write-offs, Net	(25)	(23)	(254)	(89)
Balance at end of period	8,075	8,391	8,075	8,391
Loans receivable, individually evaluated allowance	15	112	15	112	$ 101
Loans receivable, collectively evaluated allowance	8,060	8,279	8,060	8,279	7,938
Financing Receivable, Individually Evaluated for Impairment	7,114	8,303	7,114	8,303
Financing Receivable, Collectively Evaluated for Impairment	888,927	872,732	888,927	872,732
Loans Held For Investment, Gross	$ 896,041	$ 881,035	$ 896,041	$ 881,035	916,432
Allowance for loan losses as a percentage of gross loans held for investment at the end of the period	0.90%	0.96%	0.90%	0.96%
Mortgage loans, Single-family
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance at beginning of period	$ 3,579	$ 4,575	$ 3,601	$ 4,933
(Recovery) provision for loan losses	299	304	176	859
Recoveries	48	33	132	296
Allowance for Loan and Lease Losses Write-offs, Net	(25)	(21)	(254)	(87)
Balance at end of period	3,303	4,283	3,303	4,283
Loans receivable, individually evaluated allowance	0	97	0	97	86
Loans receivable, collectively evaluated allowance	3,303	4,186	3,303	4,186	3,515
Financing Receivable, Individually Evaluated for Impairment	7,038	7,844	7,038	7,844
Financing Receivable, Collectively Evaluated for Impairment	306,799	308,751	306,799	308,751
Loans Held For Investment, Gross	$ 313,837	$ 316,595	$ 313,837	$ 316,595	322,197
Allowance for loan losses as a percentage of gross loans held for investment at the end of the period	1.05%	1.35%	1.05%	1.35%
Mortgage loans, Multi-family
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance at beginning of period	$ 3,431	$ 3,186	$ 3,420	$ 2,800
(Recovery) provision for loan losses	136	36	125	(343)
Recoveries	0	6	0	13
Allowance for Loan and Lease Losses Write-offs, Net	0	0	0	0
Balance at end of period	3,295	3,156	3,295	3,156
Loans receivable, individually evaluated allowance	0	0	0	0
Loans receivable, collectively evaluated allowance	3,295	3,156	3,295	3,156	3,420
Financing Receivable, Individually Evaluated for Impairment	0	374	0	374
Financing Receivable, Collectively Evaluated for Impairment	463,786	448,091	463,786	448,091
Loans Held For Investment, Gross	$ 463,786	$ 448,465	$ 463,786	$ 448,465	479,959
Allowance for loan losses as a percentage of gross loans held for investment at the end of the period	0.71%	0.70%	0.71%	0.70%
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance at beginning of period	$ 875	$ 854	$ 879	$ 848
(Recovery) provision for loan losses	(58)	18	(54)	12
Recoveries	0	0	0	0
Allowance for Loan and Lease Losses Write-offs, Net	0	0	0	0
Balance at end of period	933	836	933	836
Loans receivable, individually evaluated allowance	0	0	0	0
Loans receivable, collectively evaluated allowance	933	836	933	836	879
Financing Receivable, Individually Evaluated for Impairment	0	0	0	0
Financing Receivable, Collectively Evaluated for Impairment	103,366	98,044	103,366	98,044
Loans Held For Investment, Gross	$ 103,366	$ 98,044	$ 103,366	$ 98,044	97,562
Allowance for loan losses as a percentage of gross loans held for investment at the end of the period	0.90%	0.85%	0.90%	0.85%
Construction Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance at beginning of period	$ 140	$ 53	$ 96	$ 31
(Recovery) provision for loan losses	(364)	(12)	(408)	(34)
Recoveries	0	0	0	0
Allowance for Loan and Lease Losses Write-offs, Net	0	0	0	0
Balance at end of period	504	65	504	65
Loans receivable, individually evaluated allowance	0	0	0	0
Loans receivable, collectively evaluated allowance	504	65	504	65	96
Financing Receivable, Individually Evaluated for Impairment	0	0	0	0
Financing Receivable, Collectively Evaluated for Impairment	14,430	16,872	14,430	16,872
Loans Held For Investment, Gross	$ 14,430	$ 16,872	$ 14,430	$ 16,872	16,009
Allowance for loan losses as a percentage of gross loans held for investment at the end of the period	3.49%	0.39%	3.49%	0.39%
Mortgage Loans, Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance at beginning of period		$ 7		$ 7
(Recovery) provision for loan losses		(1)		(1)
Recoveries		0		0
Allowance for Loan and Lease Losses Write-offs, Net		0		0
Balance at end of period		6		6
Loans receivable, individually evaluated allowance		0		0
Loans receivable, collectively evaluated allowance		6		6
Financing Receivable, Individually Evaluated for Impairment		0		0
Financing Receivable, Collectively Evaluated for Impairment		265		265
Loans Held For Investment, Gross		$ 265		$ 265
Allowance for loan losses as a percentage of gross loans held for investment at the end of the period		2.26%		2.26%
Commercial Business Loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance at beginning of period	$ 31	$ 42	$ 36	$ 43
(Recovery) provision for loan losses	(1)	5	4	6
Recoveries	0	0	0	0
Allowance for Loan and Lease Losses Write-offs, Net	0	0	0	0
Balance at end of period	32	37	32	37
Loans receivable, individually evaluated allowance	15	15	15	15	15
Loans receivable, collectively evaluated allowance	17	22	17	22	21
Financing Receivable, Individually Evaluated for Impairment	76	85	76	85
Financing Receivable, Collectively Evaluated for Impairment	402	525	402	525
Loans Held For Investment, Gross	$ 478	$ 610	$ 478	$ 610	576
Allowance for loan losses as a percentage of gross loans held for investment at the end of the period	6.69%	6.07%	6.69%	6.07%
Consumer Loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance at beginning of period	$ 7	$ 8	$ 7	$ 8
(Recovery) provision for loan losses	(1)	(2)	(1)	(1)
Recoveries	0	0	0	1
Allowance for Loan and Lease Losses Write-offs, Net	0	(2)	0	(2)
Balance at end of period	8	8	8	8
Loans receivable, individually evaluated allowance	0	0	0	0
Loans receivable, collectively evaluated allowance	8	8	8	8	7
Financing Receivable, Individually Evaluated for Impairment	0	0	0	0
Financing Receivable, Collectively Evaluated for Impairment	144	184	144	184
Loans Held For Investment, Gross	$ 144	$ 184	$ 144	$ 184	$ 129
Allowance for loan losses as a percentage of gross loans held for investment at the end of the period	5.56%	4.35%	5.56%	4.35%