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Note 7 - Loans Receivable and Credit Disclosures - Loans Receivable Impairment Analysis (Details) - USD ($) $ in Thousands		Mar. 31, 2022	Dec. 31, 2021
Individually evaluated for impairment		$ 12,157	$ 12,312
Collectively evaluated for impairment		1,134,073	1,148,355
Balance		1,146,230	1,160,667
Construction Real Estate [Member]
Individually evaluated for impairment		0	0
Collectively evaluated for impairment		46,140	42,638
Balance		46,140	42,638
Family Residential Real Estate 1-4 [Member]
Individually evaluated for impairment		976	980
Collectively evaluated for impairment		255,386	245,765
Balance		256,362	246,745
Commercial Real Estate Portfolio Segment [Member]
Individually evaluated for impairment		9,789	9,792
Collectively evaluated for impairment		497,809	505,575
Balance		507,598	515,367
Agriculture Real Estate [Member]
Individually evaluated for impairment		542	546
Collectively evaluated for impairment		151,594	152,911
Balance		152,136	153,457
Commercial Portfolio Segment [Member]
Individually evaluated for impairment		262	330
Collectively evaluated for impairment		70,888	75,152
Balance	[1]	71,150	75,482
Agriculture [Member]
Individually evaluated for impairment		564	637
Collectively evaluated for impairment		95,633	111,244
Balance		96,197	111,881
Consumer and Other [Member]
Individually evaluated for impairment		24	27
Collectively evaluated for impairment		16,623	15,070
Balance		$ 16,647	$ 15,097
[1] Commercial loan portfolio includes $0.3 million and $6.0 million of Paycheck Protection Program ("PPP") loans as of March 31, 2022 and December 31, 2021, respectively.

X

- Definition

The balance of financing receivables that were collectively evaluated for impairment.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (h)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524

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- Definition

The balance of financing receivables that were individually evaluated for impairment.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (h)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524

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- Definition

Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522

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