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Note 11 - Other Borrowings and Subordinated Debentures - Long-term Debt (Details) (Parentheticals) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Oct. 31, 2015
Fixed rate |  |  | 3.85%
U.S. Bank National Association [Member] | Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |
Floating rate | 1.50% |  |
Federal Home Loan Bank Advances [Member] | Minimum [Member] |  |  |
Fixed rate | 1.20% | 1.20% |
Federal Home Loan Bank Advances [Member] | Maximum [Member] |  |  |
Fixed rate | 7.37% | 7.37% |
Note Payable Due 10/15/2020 [Member] |  |  |
Fixed rate | 3.85% | 3.85% |
Trust Preferred Securities Due 12/30/2033 Floating Rate of 2.8% Above Three Month LIBOR 1 [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |
Floating rate | 2.80% | 2.80% |
Trust Preferred Securities Due 6/30/2035 [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |
Floating rate | 1.75% | 1.75% |
Trust Preferred Securities Due 9/15/2037 [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |
Floating rate | 1.37% | 1.37% |
Trust Preferred Securities Due 12/5/2033 [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |
Floating rate | 2.88% | 2.88% |
Trust Preferred Securities Due 10/18/2034 [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |
Floating rate | 2.00% | 2.00% |
Trust Preferred Securities, Due 6/6/2037 [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |
Floating rate | 1.57% | 1.57% |
Trust Preferred Securities, Due 12/15/2035 [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |
Floating rate | 1.45% |  |
Trust Preferred Securities, Due 6/26/2033 [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |
Floating rate | 3.10% |  |
Trust Preferred Securities, Due 10/7/2033 [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |
Floating rate | 2.85% |  |
Second Trust Preferred Securities Due 9/15/2037 [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |
Floating rate | 2.00% |  |

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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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