v3.26.1

Loans, Leases and Allowance - Narrative (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2026 USD ($) segment	Dec. 31, 2025 USD ($)	Dec. 31, 2025 USD ($)
Loans and Leases Receivable Disclosure [Line Items]
Interest income on nonaccrual loans and leases	$ 1	$ 3
Foreclosed residential real estate with physical possession	56	56	$ 56
Consumer mortgage loans secured by residential real estate properties in process of foreclosure	$ 1,055	923	923
Number of loan portfolio segments \| segment	8
Allowance for credit loss, period increase (decrease)	$ 16,700	$ 16,500	$ 16,500
Financing receivable, excluding accrued interest, provision for net amount	621
Financing receivable, excluding accrued interest, net charge-offs	347
Commercial and industrial
Loans and Leases Receivable Disclosure [Line Items]
Allowance for credit loss, period increase (decrease)	(2,700)
Construction and development
Loans and Leases Receivable Disclosure [Line Items]
Allowance for credit loss, period increase (decrease)	(2,600)
Home equity lines of credit
Loans and Leases Receivable Disclosure [Line Items]
Allowance for credit loss, period increase (decrease)	(1,300)
Multi-Family
Loans and Leases Receivable Disclosure [Line Items]
Allowance for credit loss, period increase (decrease)	860
Commercial Loan Portfolio \| Indianapolis, Indiana
Loans and Leases Receivable Disclosure [Line Items]
Downtown capital projects	$ 6,000,000
Commercial Loan Portfolio \| Financing Receivable \| Portfolio Segment Concentration Risk
Loans and Leases Receivable Disclosure [Line Items]
Concentration risk (as a percent)	70.70%		70.20%
Commercial Loan Portfolio \| Allowance for Credit Losses \| Portfolio Segment Concentration Risk
Loans and Leases Receivable Disclosure [Line Items]
Concentration risk (as a percent)	68.20%		66.90%

Represents the monetary amount of Consumer Mortgage Loans Secured by Residential Real Estate Properties in Process of Foreclosure, during the indicated time period.

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- Definition

Financing Receivable, Excluding Accrued Interest, Before Allowance For Credit Loss, Increase (Decrease)

+ References

No definition available.

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- Definition

Financing Receivable, Excluding Accrued Interest, Net Charge-Offs

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No definition available.

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- Definition

Financing Receivable, Excluding Accrued Interest, Provision for Net Amount

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No definition available.

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- Definition

Financing Receivable, Forecast, Downtown Capital Projects

+ References

No definition available.

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- Definition

Represents the monetary amount of Foreclosed Residential Real Estate With Physical Possession, during the indicated time period.

+ References

No definition available.

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- Definition

Number Of Loan Portfolio Segments

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No definition available.

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-42

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 275
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-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-18

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 275
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-18

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 275
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-Name Accounting Standards Codification
-Section 50
-Paragraph 20
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-20

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 275
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-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-18

Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 275
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-Section 50
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-18

Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 275
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-18

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- Definition

Amount of interest income on financing receivable on nonaccrual status.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 16
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-16

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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Richmond Mutual Bancorporation, Inc. 10-Q