Note 4 - Loans and Other Real Estate Owned ("OREO") (Details Textual) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2026 USD ($)	Dec. 31, 2025 USD ($)	Aug. 01, 2025 USD ($)	Mar. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)
Financing Receivable, Accrued Interest, after Allowance for Credit Loss	$ 2,670	$ 2,690
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	9,755	9,904		$ 4,451	$ 4,379
Business Combination, Recognized Asset Acquired, Loan Gross	389,060	401,492
Financing Receivable Acquired, Unamortized Purchase Premium (Discount)	15,430
Repossessed Assets		0
Mortgage Loans in Process of Foreclosure, Amount	5,920	5,500
Servicing Liability	156,730	159,310
Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	3,111	3,320		1,133	1,007
Business Combination, Recognized Asset Acquired, Loan Gross	70,754	73,315
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	3,991	4,013		2,295	2,366
Business Combination, Recognized Asset Acquired, Loan Gross	88,281	89,564
Real Estate Loan [Member] \| Residential Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	2,313	2,246		$ 816	$ 823
Business Combination, Recognized Asset Acquired, Loan Gross	$ 201,090	$ 208,025
Financing Receivable, Number of Loans Foreclosed	1
Repossessed Assets	$ 147
Financing Receivable, Number of Loans in Process of Foreclosure	12	14
Real Estate Loan [Member] \| Commercial Portfolio Segment [Member]
Financing Receivable, Number of Loans in Process of Foreclosure	2	2
Real Estate Loan [Member] \| Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Number of Loans in Process of Foreclosure	2	3
Real Estate Loan [Member] \| Home Equity Portfolio Segment [Member]
Financing Receivable, Number of Loans in Process of Foreclosure	1
Northumberland Bancorp [Member]
Business Combination, Recognized Asset Acquired, Loan Gross		$ 427,170	$ 427,066
Northumberland Bancorp [Member] \| N N B [Member]
Business Combination, Recognized Asset Acquired, Loan Gross			446,420
Financial Asset Acquired and No Credit Deterioration [Member]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	$ 4,010
Business Combination, Recognized Asset Acquired, Loan Gross	338,328	349,451
Financial Asset Acquired and No Credit Deterioration [Member] \| Commercial Portfolio Segment [Member]
Business Combination, Recognized Asset Acquired, Loan Gross	54,631	56,156
Financial Asset Acquired and No Credit Deterioration [Member] \| Commercial Real Estate Portfolio Segment [Member]
Business Combination, Recognized Asset Acquired, Loan Gross	71,760	72,823
Financial Asset Acquired and No Credit Deterioration [Member] \| Real Estate Loan [Member] \| Residential Portfolio Segment [Member]
Business Combination, Recognized Asset Acquired, Loan Gross	183,037	189,920
Financial Asset Acquired with Credit Deterioration [Member]
Business Combination, Recognized Asset Acquired, Loan Gross	50,732	52,041
Financial Asset Acquired with Credit Deterioration [Member] \| Commercial Portfolio Segment [Member]
Business Combination, Recognized Asset Acquired, Loan Gross	16,123	17,159
Financial Asset Acquired with Credit Deterioration [Member] \| Commercial Real Estate Portfolio Segment [Member]
Business Combination, Recognized Asset Acquired, Loan Gross	16,521	16,741
Financial Asset Acquired with Credit Deterioration [Member] \| Real Estate Loan [Member] \| Residential Portfolio Segment [Member]
Business Combination, Recognized Asset Acquired, Loan Gross	$ 18,053	$ 18,105
Financial Asset Acquired with Credit Deterioration [Member] \| Northumberland Bancorp [Member] \| N N B [Member]
Business Combination, Recognized Asset Acquired, Loan Gross			$ 53,680
Financing Receivable, Percentage of Loan Portfolio			12.00%

STEELE BANCORP INC 10-Q