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Note 7 - Loans Receivable and Credit Disclosures - Loans Receivable Impairment Analysis (Details) - USD ($) $ in Thousands		Sep. 30, 2021	Dec. 31, 2020
Individually evaluated for impairment		$ 12,493	$ 15,273
Collectively evaluated for impairment		1,130,812	1,132,304
Balance		1,143,305	1,147,577
Construction Real Estate [Member]
Individually evaluated for impairment		0	167
Collectively evaluated for impairment		37,476	45,330
Balance		37,476	45,497
Family Residential Real Estate 1-4 [Member]
Individually evaluated for impairment		1,000	1,340
Collectively evaluated for impairment		230,468	212,222
Balance		231,468	213,562
Commercial Real Estate Portfolio Segment [Member]
Individually evaluated for impairment		9,954	10,258
Collectively evaluated for impairment		509,158	486,099
Balance		519,112	496,357
Agriculture Real Estate [Member]
Individually evaluated for impairment		576	1,664
Collectively evaluated for impairment		152,671	150,328
Balance		153,247	151,992
Commercial Portfolio Segment [Member]
Individually evaluated for impairment		295	940
Collectively evaluated for impairment		85,274	121,595
Balance	[1]	85,569	122,535
Agriculture [Member]
Individually evaluated for impairment		638	859
Collectively evaluated for impairment		100,449	101,727
Balance		101,087	102,586
Consumer and Other [Member]
Individually evaluated for impairment		30	45
Collectively evaluated for impairment		15,316	15,003
Balance		$ 15,346	$ 15,048
[1] Commercial loan portfolio includes $14.8 million and $50.9 million of Paycheck Protection Program ("PPP") loans as of September 30, 2021 and December 31, 2020, 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 http://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)
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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 http://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522

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