Note 3 - Loans (Details Textual) $ in Thousands	3 Months Ended
Note 3 - Loans (Details Textual) $ in Thousands	Mar. 31, 2026 USD ($)	Mar. 31, 2025 USD ($)	Sep. 30, 2024	Dec. 31, 2025 USD ($)
Financing Receivable, Unamortized Loan Cost (Fee)	$ 1,100			$ 1,100
Financing Receivable, Accrued Interest, after Allowance for Credit Loss	7,200			$ 7,100
Financing Receivable, Nonaccrual, Interest Income	20	$ 1
Financing Receivable, Accrued Interest, Writeoff	$ 146	$ 9
Financing Receivable, Nonaccrual to Outstanding, Percent	0.19%			0.11%
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	0.79%			0.80%
Mortgage Loans in Process of Foreclosure, Amount	$ 118			$ 33
Financing Receivable, Modified, Commitment to Lend	$ 0			$ 0
Financing Receivable, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]	Interest Receivable			Interest Receivable
Federal Home Loan Mortgage Corporation and Other Investors [Member]
Unpaid Principal Balance Of Loans Serviced For Others	$ 325,100			$ 333,500
Commercial and Industrial Portfolio Segment [Member]
Financing Receivable, Modified, Subsequent Default, Number of Loans	1
Residential Portfolio Segment [Member] \| Home Equity Line-of-credit loans [Member]
Financing Receivable, Amortization Period (Year)	5 years
Consumer Portfolio Segment [Member]
Financing Receivable, Modified, Subsequent Default, Number of Loans		2	2
Financing Receivable, Excluding Accrued Interest, Modified, Subsequent Default		$ 27
Minimum [Member] \| Commercial and Industrial Portfolio Segment [Member]
Loans and Leases Receivable, Term (Year)	1 year
Minimum [Member] \| Commercial Real Estate Portfolio Segment [Member]
Loans and Leases Receivable, Term (Year)	5 years
Financing Receivable, Periodic Payment Terms, Balloon Payment Period (Year)	1 year
Financing Receivable, Variable Rates Of Interest, Adjustment Period (Year)	1 year
Loan And Lease Receivable, Ratio Of Loan To Appraised Value	0.75
Minimum [Member] \| Residential Portfolio Segment [Member]
Financing Receivable, Variable Rates Of Interest, Adjustment Period (Year)	1 year
Loan And Lease Receivable, Ratio Of Loan To Appraised Value	0.80
Financing Receivable, Amortization Period (Year)	5 years
Maximum [Member] \| Commercial and Industrial Portfolio Segment [Member]
Loans and Leases Receivable, Term (Year)	10 years
Maximum [Member] \| Commercial Real Estate Portfolio Segment [Member]
Loans and Leases Receivable, Term (Year)	25 years
Financing Receivable, Periodic Payment Terms, Balloon Payment Period (Year)	10 years
Financing Receivable, Variable Rates Of Interest, Adjustment Period (Year)	10 years
Loan And Lease Receivable, Ratio Of Loan To Appraised Value	0.85
Maximum [Member] \| Residential Portfolio Segment [Member]
Financing Receivable, Variable Rates Of Interest, Adjustment Period (Year)	15 years
Financing Receivable, Amortization Period (Year)	30 years
Maximum [Member] \| Consumer Portfolio Segment [Member]
Loans and Leases Receivable, Term (Year)	84 months
Unemployment Rate [Member] \| Minimum [Member]
Allowance for Credit Losses, Measurement Input	0.0501			0.0545
Unemployment Rate [Member] \| Maximum [Member]
Allowance for Credit Losses, Measurement Input	0.0576			0.0622
Unemployment Rate [Member] \| Arithmetic Average [Member]
Allowance for Credit Losses, Measurement Input	0.0569
Coincident Economic Activity [Member] \| Minimum [Member]
Allowance for Credit Losses, Measurement Input	0.0036			0.0007
Coincident Economic Activity [Member] \| Maximum [Member]
Allowance for Credit Losses, Measurement Input	0.0106			0.0058
Coincident Economic Activity [Member] \| Arithmetic Average [Member]
Allowance for Credit Losses, Measurement Input	0.0196
Home Price Index [Member] \| Minimum [Member]
Allowance for Credit Losses, Measurement Input	(0.0288)			(0.033)
Home Price Index [Member] \| Maximum [Member]
Allowance for Credit Losses, Measurement Input	(0.0268)			(0.0124)
Home Price Index [Member] \| Arithmetic Average [Member]
Allowance for Credit Losses, Measurement Input	0.0282

LCNB CORP 10-Q