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Note 5 - Credit Quality - Average Annual Recorded Investment and Interest Income Recognized on Impaired Loans Excluding Purchased Credit Impaired Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Impaired loans with no related allowance, interest income recognized	$ 1,436	$ 1,077
Impaired loans with no related allowance, average recorded investment	38,230	29,693
Impaired loans with a related allowance, interest income recognized	46	94
Impaired loans with a related allowance, average recorded investment	3,427	2,713
Total impaired loans	1,482	1,171
Total impaired loans, average recorded investment	41,657	32,406
Commercial Portfolio Segment [Member] | Construction, Development and Other Land [Member]
Impaired loans with no related allowance, interest income recognized	25	22
Impaired loans with no related allowance, average recorded investment	935	704
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Impaired loans with no related allowance, interest income recognized	155	34
Impaired loans with no related allowance, average recorded investment	2,749	363
Commercial Portfolio Segment [Member] | Multi-family Residential [Member]
Impaired loans with no related allowance, interest income recognized	19	24
Impaired loans with no related allowance, average recorded investment	808	1,356
Impaired loans with a related allowance, interest income recognized	0	0
Impaired loans with a related allowance, average recorded investment	707	0
Commercial Portfolio Segment [Member] | Single Family Non-owner Occupied [Member]
Impaired loans with no related allowance, interest income recognized	189	123
Impaired loans with no related allowance, average recorded investment	4,890	2,979
Impaired loans with a related allowance, interest income recognized	0	0
Impaired loans with a related allowance, average recorded investment	0	0
Commercial Portfolio Segment [Member] | Non-farm, Non-residential [Member]
Impaired loans with no related allowance, interest income recognized	295	123
Impaired loans with no related allowance, average recorded investment	7,450	4,683
Impaired loans with a related allowance, interest income recognized	17	48
Impaired loans with a related allowance, average recorded investment	1,524	766
Commercial Portfolio Segment [Member] | Agricultural [Member]
Impaired loans with no related allowance, interest income recognized	9	9
Impaired loans with no related allowance, average recorded investment	241	121
Commercial Portfolio Segment [Member] | Farmland [Member]
Impaired loans with no related allowance, interest income recognized	63	55
Impaired loans with no related allowance, average recorded investment	1,569	1,469
Impaired loans with a related allowance, interest income recognized	0	0
Impaired loans with a related allowance, average recorded investment	0	0
Consumer Real Estate Portfolio Segment [Member] | Home Equity Lines [Member]
Impaired loans with no related allowance, interest income recognized	51	46
Impaired loans with no related allowance, average recorded investment	1,594	1,439
Impaired loans with a related allowance, interest income recognized	0	0
Impaired loans with a related allowance, average recorded investment	0	0
Consumer Real Estate Portfolio Segment [Member] | Single Family Owner Occupied [Member]
Impaired loans with no related allowance, interest income recognized	578	599
Impaired loans with no related allowance, average recorded investment	17,044	16,058
Impaired loans with a related allowance, interest income recognized	29	46
Impaired loans with a related allowance, average recorded investment	1,196	1,947
Consumer Real Estate Portfolio Segment [Member] | Owner Occupied Construction [Member]
Impaired loans with no related allowance, interest income recognized	10	29
Impaired loans with no related allowance, average recorded investment	407	308
Consumer and Other Portfolio Segment [Member] | Consumer Loans [Member]
Impaired loans with no related allowance, interest income recognized	42	13
Impaired loans with no related allowance, average recorded investment	$ 543	$ 213

X

- Definition

Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(1)
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-Publisher FASB
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