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Note 7 - Loans Receivable and Credit Disclosures - Loans Receivable Impairment Analysis (Details) - USD ($) $ in Thousands		Jun. 30, 2021	Dec. 31, 2020
Individually evaluated for impairment		$ 12,696	$ 15,273
Collectively evaluated for impairment		1,130,740	1,132,304
Balance		1,143,436	1,147,577
Construction Real Estate [Member]
Individually evaluated for impairment		0	167
Collectively evaluated for impairment		46,164	45,330
Balance		46,164	45,497
Family Residential Real Estate 1-4 [Member]
Individually evaluated for impairment		953	1,340
Collectively evaluated for impairment		225,730	212,222
Balance		226,683	213,562
Commercial Real Estate Portfolio Segment [Member]
Individually evaluated for impairment		10,153	10,258
Collectively evaluated for impairment		488,408	486,099
Balance		498,561	496,357
Agriculture Real Estate [Member]
Individually evaluated for impairment		628	1,664
Collectively evaluated for impairment		151,529	150,328
Balance		152,157	151,992
Commercial Portfolio Segment [Member]
Individually evaluated for impairment		271	940
Collectively evaluated for impairment		105,745	121,595
Balance	[1]	106,016	122,535
Agriculture [Member]
Individually evaluated for impairment		650	859
Collectively evaluated for impairment		97,583	101,727
Balance		98,233	102,586
Consumer and Other [Member]
Individually evaluated for impairment		41	45
Collectively evaluated for impairment		15,581	15,003
Balance		$ 15,622	$ 15,048
[1] Commercial loan portfolio includes $37.6 million and $50.9 million of Paycheck Protection Program ("PPP") loans as of June 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)
-URI http://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 http://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522

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