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Note 8 - Loans - Accruing Troubled Debt Restructurings (Details) - Accruing Troubled Debt Restructuring [Member] - USD ($) $ in Thousands	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019
Accruing TDRs	$ 24,406	$ 27,261	$ 27,721	$ 28,587	$ 31,671	$ 35,336
Payment Deferral [Member]
Accruing TDRs	3,620		6,222
Contractual Interest Rate Reduction [Member]
Accruing TDRs	5,803		5,910
Rate Reduction and Payment Deferral [Member]
Accruing TDRs	14,983		15,589
Commercial Portfolio Segment [Member]
Accruing TDRs	1,453		3,983
Commercial Portfolio Segment [Member] | Payment Deferral [Member]
Accruing TDRs	1,453		3,983
Commercial Portfolio Segment [Member] | Contractual Interest Rate Reduction [Member]
Accruing TDRs	0		0
Commercial Portfolio Segment [Member] | Rate Reduction and Payment Deferral [Member]
Accruing TDRs	0		0
Commercial Real Estate Portfolio Segment [Member]
Accruing TDRs	19,107		19,575
Commercial Real Estate Portfolio Segment [Member] | Payment Deferral [Member]
Accruing TDRs	441		515
Commercial Real Estate Portfolio Segment [Member] | Contractual Interest Rate Reduction [Member]
Accruing TDRs	5,552		5,635
Commercial Real Estate Portfolio Segment [Member] | Rate Reduction and Payment Deferral [Member]
Accruing TDRs	13,114		13,425
Residential Portfolio Segment [Member]
Accruing TDRs	3,846		4,163
Residential Portfolio Segment [Member] | Payment Deferral [Member]
Accruing TDRs	1,726		1,724
Residential Portfolio Segment [Member] | Contractual Interest Rate Reduction [Member]
Accruing TDRs	251		275
Residential Portfolio Segment [Member] | Rate Reduction and Payment Deferral [Member]
Accruing TDRs	$ 1,869		$ 2,164

X

- Definition

Amount of financing receivable modified as troubled debt restructuring.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 40
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=121585226&loc=d3e18845-111554

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