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Note 18 - Fair Value of Financial Instruments - Quantitative Information About Non-recurring Level 3 Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Trust Preferred Securities [Member] |  |
Fair Value | $ 1,110 | $ 7,361
Valuation Technique | Discounted cash flows | Discounted cash flows
Unobservable Input | Discount rate | Discount rate
Range |  | 7.00%
Trust Preferred Securities [Member] | Minimum [Member] |  |
Range |  | 6.30%
Trust Preferred Securities [Member] | Weighted Average [Member] |  |
Range | 5.70% |
Trust Preferred Securities [Member] | Maximum [Member] |  |
Range |  | 7.10%
Junior Subordinated Debentures [Member] |  |
Valuation Technique | Discounted cash flows | Discounted cash flows
Unobservable Input | Discount rate | Discount rate
Fair Value | $ 36,986 | $ 33,959
Junior Subordinated Debentures [Member] | Weighted Average [Member] |  |
Range | 5.70% | 6.30%

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- Definition Interest rate of the unobservable input to the valuation technique. + References No definition available. + Details
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- Definition Unobservable input of the valuation technique. + References No definition available. + Details
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- Definition Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Description of the inputs and valuation technique(s) used to measure fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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