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Note 5 - Loans Receivable and Credit Disclosures - Loans Receivable Impairment Analysis (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Ending balance: Individually evaluated for impairment |  | $ 15,273 | $ 4,788
Ending balance: Collectively evaluated for impairment |  | 1,132,304 | 1,056,058
Ending balance |  | 1,147,577 | 1,060,846
Construction Real Estate [Member] |  |  |
Ending balance: Individually evaluated for impairment |  | 167 | 0
Ending balance: Collectively evaluated for impairment |  | 45,330 | 47,895
Ending balance |  | 45,497 | 47,895
Family Residential Real Estate 1-4 [Member] |  |  |
Ending balance: Individually evaluated for impairment |  | 1,340 | 1,204
Ending balance: Collectively evaluated for impairment |  | 212,222 | 200,306
Ending balance |  | 213,562 | 201,510
Commercial Real Estate Portfolio Segment [Member] |  |  |
Ending balance: Individually evaluated for impairment |  | 10,258 | 83
Ending balance: Collectively evaluated for impairment |  | 486,099 | 435,767
Ending balance |  | 496,357 | 435,850
Agriculture Real Estate [Member] |  |  |
Ending balance: Individually evaluated for impairment |  | 1,664 | 84
Ending balance: Collectively evaluated for impairment |  | 150,328 | 160,687
Ending balance |  | 151,992 | 160,771
Commercial Portfolio Segment [Member] |  |  |
Ending balance: Individually evaluated for impairment |  | 940 | 462
Ending balance: Collectively evaluated for impairment |  | 121,595 | 83,622
Ending balance | [1] | 122,535 | 84,084
Agriculture [Member] |  |  |
Ending balance: Individually evaluated for impairment |  | 859 | 2,951
Ending balance: Collectively evaluated for impairment |  | 101,727 | 108,994
Ending balance |  | 102,586 | 111,945
Consumer and Other [Member] |  |  |
Ending balance: Individually evaluated for impairment |  | 45 | 4
Ending balance: Collectively evaluated for impairment |  | 15,003 | 18,787
Ending balance |  | $ 15,048 | $ 18,791
[1] | Commercial loan portfolio as of December 31, 2020 includes $50.9 million Paycheck Protection Program ("PPP") loans

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- 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=121611835&loc=SL6953423-111524 + Details
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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=121611835&loc=SL6953423-111524 + Details
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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=121593590&loc=d3e4428-111522 + Details
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