Loans Receivable And Allowance For Loan Losses: Impaired Financing Receivables (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended	9 Months Ended
	Mar. 31, 2023		Mar. 31, 2023	Jun. 30, 2022		Sep. 30, 2022
Recorded Investment
With no related allowance recorded	$ 4,273		$ 4,273			$ 4,282
With an allowance recorded	245		245			250
Total:	4,518		4,518			4,532
Unpaid Principal Balance (Loan Balance Plus Charge Off)
With no related allowance recorded	4,365		4,365			4,375
With an allowance recorded	245		245			250
Total:	4,610		4,610			4,625
Related Allowance	123		123			127
Average Recorded Investment
With no related allowance recorded	4,263	[1]	4,268	$ 4,567
With an allowance recorded	247	[1]	249	413
Total	4,510	[1]	4,517	4,980
Interest Income Recognized
With no related allowance recorded	52	[1]	103	189	[1]
With an allowance recorded	0	[1]	0	0
Total	52	[1]	103	189
Cash Basis Interest Income Recognized
With no related allowance recorded	42	[1]	84	159
With an allowance recorded	0	[1]	0	0
Total	42	[1]	84	159
Mortgage loans, one-to-four family
Recorded Investment
With no related allowance recorded	378		378			388
Total:	378		378			388
Unpaid Principal Balance (Loan Balance Plus Charge Off)
With no related allowance recorded	421		421			432
Total:	421		421			432
Related Allowance	0		0			0
Average Recorded Investment
With no related allowance recorded	381	[1]	386	470
Total	381	[1]	386	470
Interest Income Recognized
With no related allowance recorded	7	[1]	14	31	[1]
Total	7	[1]	14	31
Cash Basis Interest Income Recognized
With no related allowance recorded	7	[1]	14	31
Total	7	[1]	14	31
Mortgage loans, commercial
Recorded Investment
With no related allowance recorded	3,006		3,006			2,988
Total:	3,006		3,006			2,988
Unpaid Principal Balance (Loan Balance Plus Charge Off)
With no related allowance recorded	3,006		3,006			2,988
Total:	3,006		3,006			2,988
Related Allowance	0		0			0
Average Recorded Investment
With no related allowance recorded	2,890	[1]	2,984	3,041
Total	2,890	[1]	2,984	3,041
Interest Income Recognized
With no related allowance recorded	40	[1]	81	152	[1]
Total	40	[1]	81	152
Cash Basis Interest Income Recognized
With no related allowance recorded	30	[1]	63	123
Total	30	[1]	63	123
Mortgage loans, land
Recorded Investment
With no related allowance recorded	459		459			450
Total:	459		459			450
Unpaid Principal Balance (Loan Balance Plus Charge Off)
With no related allowance recorded	459		459			450
Total:	459		459			450
Related Allowance	0		0			0
Average Recorded Investment
With no related allowance recorded	442	[1]	438	492
Total	442	[1]	438	492
Interest Income Recognized
With no related allowance recorded	2	[1]	2	0	[1]
Total	2	[1]	2	0
Cash Basis Interest Income Recognized
With no related allowance recorded	2	[1]	2	0
Total	2	[1]	2	0
Consumer loans, home equity and second mortgage
Recorded Investment
With no related allowance recorded	381		381			394
With an allowance recorded						0
Total:	381		381			394
Unpaid Principal Balance (Loan Balance Plus Charge Off)
With no related allowance recorded	381		381			394
With an allowance recorded						0
Total:	381		381			394
Related Allowance	0		0			0
Average Recorded Investment
With no related allowance recorded	496	[1]	400	436
With an allowance recorded				145
Total	496	[1]	400	581
Interest Income Recognized
With no related allowance recorded	3	[1]	6	6	[1]
With an allowance recorded				0
Total	3	[1]	6	6
Cash Basis Interest Income Recognized
With no related allowance recorded	3	[1]	5	5
With an allowance recorded				0
Total	3	[1]	5	5
Consumer loans, other
Recorded Investment
With no related allowance recorded	1		1			3
Total:	1		1			3
Unpaid Principal Balance (Loan Balance Plus Charge Off)
With no related allowance recorded	1		1			3
Total:	1		1			3
Related Allowance	0		0			0
Average Recorded Investment
With no related allowance recorded	2	[1]	3	7
Total	2	[1]	3	7
Interest Income Recognized
With no related allowance recorded	0	[1]	0	0
Total	0	[1]	0	0
Cash Basis Interest Income Recognized
With no related allowance recorded	0	[1]	0
With an allowance recorded				0
Total	0	[1]	0	0
Commercial business loans
Recorded Investment
With no related allowance recorded	48		48			59
With an allowance recorded	245		245			250
Total:	293		293			309
Unpaid Principal Balance (Loan Balance Plus Charge Off)
With no related allowance recorded	97		97			108
With an allowance recorded	245		245			250
Total:	342		342			358
Related Allowance	123		123			$ 127
Average Recorded Investment
With no related allowance recorded	52	[1]	57	121
With an allowance recorded	247		249	268
Total	299	[1]	306	389
Interest Income Recognized
With no related allowance recorded	0	[1]	0	0	[1]
With an allowance recorded	0	[1]	0	0
Total	0	[1]	0	0
Cash Basis Interest Income Recognized
With no related allowance recorded	0	[1]	0	0
With an allowance recorded	0	[1]	0	0
Total	$ 0	[1]	$ 0	$ 0

[1] For the three months ended March 31, 2023