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Note 7 - Loans Receivable and Credit Disclosures - Loans Receivable Impairment Analysis (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Individually evaluated for credit losses	$ 11,340	$ 14,386
Collectively evaluated for credit losses	1,237,751	1,227,322
Balance	1,249,091	1,241,708
Construction Real Estate [Member]
Individually evaluated for credit losses	0	0
Collectively evaluated for credit losses	62,777	51,253
Balance	62,777	51,253
Family Residential Real Estate 1-4 [Member]
Individually evaluated for credit losses	803	805
Collectively evaluated for credit losses	293,108	284,302
Balance	293,911	285,107
Multifamily [Member]
Individually evaluated for credit losses	0	0
Collectively evaluated for credit losses	191,206	185,784
Balance	191,206	185,784
Commercial Real Estate Portfolio Segment [Member]
Individually evaluated for credit losses	9,022	12,853
Collectively evaluated for credit losses	335,086	340,432
Balance	344,108	353,285
Agriculture Real Estate [Member]
Individually evaluated for credit losses	486	165
Collectively evaluated for credit losses	158,197	159,283
Balance	158,683	159,448
Commercial Portfolio Segment [Member]
Individually evaluated for credit losses	278	200
Collectively evaluated for credit losses	90,018	77,065
Balance	90,296	77,265
Agriculture [Member]
Individually evaluated for credit losses	736	342
Collectively evaluated for credit losses	91,380	113,013
Balance	92,116	113,355
Consumer and Other [Member]
Individually evaluated for credit losses	15	21
Collectively evaluated for credit losses	15,979	16,190
Balance	$ 15,994	$ 16,211

X

- Definition

Amortized cost, before allowance for credit loss, fee, and loan in process, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-5

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481990/310-10-45-2

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(7))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1

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Period Type:	instant

X

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 4
-Subparagraph (SAB Topic 6.L(5)(a))
-Publisher FASB
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11C
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-11C

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X

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11C
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-11C

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 310
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-Name Accounting Standards Codification
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-Paragraph 4
-Subparagraph (SAB Topic 6.L(5)(a))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480418/310-10-S99-4

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