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Loans, Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		9 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Sep. 30, 2023	Dec. 31, 2023
Allowance for loan losses [Roll Forward]
Balance, beginning of period	$ 10,557	$ 7,858	$ 10,525	$ 5,646	$ 5,646
Provision for (recovery of) credit losses	(220)	131	(143)	163
Losses charged off	(86)	(49)	(164)	(85)
Recoveries	68	16	101	36
Balance, end of period	$ 11,270	$ 7,956	11,270	$ 7,956
Financing Receivable, Excluding Accrued Interest, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date			$ 188
Ratio Of Net Charge-Offs To Average Loans	0.00%	0.01%	0.00%	0.01%
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	0.65%		0.65%			0.61%
Eagle Financial Bancorp, Inc.
Allowance for loan losses [Roll Forward]
Provision for (recovery of) credit losses	$ 763		$ 763
Financing Receivable, Excluding Accrued Interest, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date	188
Cumulative Effect Period Of Adoption Adjustment
Allowance for loan losses [Roll Forward]
Balance, beginning of period				$ 2,196	2,196
Commercial Portfolio Segment
Allowance for loan losses [Roll Forward]
Balance, beginning of period	967	$ 1,047	1,039	1,300	1,300
Provision for (recovery of) credit losses	449	33	377	292
Losses charged off	0	(15)	0	(15)	(15)
Recoveries	0	0	0	0
Balance, end of period	$ 1,568	$ 1,065	1,568	$ 1,065
Financing Receivable, Excluding Accrued Interest, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date			$ 101
Ratio Of Net Charge-Offs To Average Loans	0.00%	0.05%	0.00%	0.02%
Commercial Portfolio Segment | Eagle Financial Bancorp, Inc.
Allowance for loan losses [Roll Forward]
Provision for (recovery of) credit losses	$ 51		$ 51
Financing Receivable, Excluding Accrued Interest, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date	101
Commercial Portfolio Segment | Cumulative Effect Period Of Adoption Adjustment
Allowance for loan losses [Roll Forward]
Balance, beginning of period				$ (512)	(512)
Commercial Real Estate Portfolio Segment
Allowance for loan losses [Roll Forward]
Balance, beginning of period	6,486	$ 4,927	5,414	3,609	3,609
Provision for (recovery of) credit losses	(512)	96	560	(26)
Losses charged off	0	0	0	0	0
Recoveries	0	0	0	0
Balance, end of period	$ 6,228	$ 5,023	6,228	$ 5,023
Financing Receivable, Excluding Accrued Interest, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date			$ 8
Ratio Of Net Charge-Offs To Average Loans	0.00%	0.00%	0.00%	0.00%
Commercial Real Estate Portfolio Segment | Eagle Financial Bancorp, Inc.
Allowance for loan losses [Roll Forward]
Provision for (recovery of) credit losses	$ 246		$ 246
Financing Receivable, Excluding Accrued Interest, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date	8
Commercial Real Estate Portfolio Segment | Cumulative Effect Period Of Adoption Adjustment
Allowance for loan losses [Roll Forward]
Balance, beginning of period				$ 1,440	1,440
Residential Portfolio Segment
Allowance for loan losses [Roll Forward]
Balance, beginning of period	2,852	$ 1,351	3,816	624	624
Provision for (recovery of) credit losses	(184)	(25)	(1,148)	(134)
Losses charged off	0	0	0	0	(4)
Recoveries	9	0	9	0
Balance, end of period	$ 3,222	$ 1,326	3,222	$ 1,326
Financing Receivable, Excluding Accrued Interest, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date			$ 79
Ratio Of Net Charge-Offs To Average Loans	0.01%	0.00%	0.00%	0.00%
Residential Portfolio Segment | Eagle Financial Bancorp, Inc.
Allowance for loan losses [Roll Forward]
Provision for (recovery of) credit losses	$ 466		$ 466
Financing Receivable, Excluding Accrued Interest, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date	79
Residential Portfolio Segment | Cumulative Effect Period Of Adoption Adjustment
Allowance for loan losses [Roll Forward]
Balance, beginning of period				$ 836	836
Consumer
Allowance for loan losses [Roll Forward]
Balance, beginning of period	232	$ 526	238	86	86
Provision for (recovery of) credit losses	(21)	12	(32)	9
Losses charged off	(40)	(4)	(43)	(9)	(83)
Recoveries	41	1	49	3
Balance, end of period	$ 212	$ 535	212	$ 535
Financing Receivable, Excluding Accrued Interest, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date			$ 0
Ratio Of Net Charge-Offs To Average Loans	0.02%	0.04%	(0.05%)	0.04%
Consumer | Eagle Financial Bancorp, Inc.
Allowance for loan losses [Roll Forward]
Provision for (recovery of) credit losses	$ 0		$ 0
Financing Receivable, Excluding Accrued Interest, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date	0
Consumer | Cumulative Effect Period Of Adoption Adjustment
Allowance for loan losses [Roll Forward]
Balance, beginning of period				$ 446	446
Agricultural
Allowance for loan losses [Roll Forward]
Balance, beginning of period	18	$ 7	18	22	22
Provision for (recovery of) credit losses	20	(2)	20	(8)
Losses charged off	0	0	0	0	0
Recoveries	0	0	0	0
Balance, end of period	$ 38	$ 5	38	$ 5
Financing Receivable, Excluding Accrued Interest, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date			$ 0
Ratio Of Net Charge-Offs To Average Loans	0.00%	0.00%	0.00%	0.00%
Agricultural | Eagle Financial Bancorp, Inc.
Allowance for loan losses [Roll Forward]
Provision for (recovery of) credit losses	$ 0		$ 0
Financing Receivable, Excluding Accrued Interest, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date	0
Agricultural | Cumulative Effect Period Of Adoption Adjustment
Allowance for loan losses [Roll Forward]
Balance, beginning of period				$ (9)	(9)
Other
Allowance for loan losses [Roll Forward]
Balance, beginning of period	2	$ 0	0	5	5
Provision for (recovery of) credit losses	28	17	80	30
Losses charged off	(46)	(30)	(121)	(61)	(166)
Recoveries	18	15	43	33
Balance, end of period	$ 2	$ 2	2	$ 2
Financing Receivable, Excluding Accrued Interest, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date			$ 0
Ratio Of Net Charge-Offs To Average Loans	(73.60%)	91.85%	121.28%	79.90%
Other | Eagle Financial Bancorp, Inc.
Allowance for loan losses [Roll Forward]
Provision for (recovery of) credit losses	$ 0		$ 0
Financing Receivable, Excluding Accrued Interest, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date	$ 0
Other | Cumulative Effect Period Of Adoption Adjustment
Allowance for loan losses [Roll Forward]
Balance, beginning of period				$ (5)	$ (5)

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Percentage of allowance for credit loss to total financing receivable outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph a
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-Publisher SEC

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Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
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