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Note 10 - Short-term Borrowings (Tables) | 12 Months Ended
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Dec. 31, 2017
Notes Tables |
Schedule of Short-term Debt [Table Text Block] |
(Dollar amounts in thousands) |  | 2017 |  |  | 2016 |
Balance at year-end |  | $ | 74,707 |  |  | $ | 68,359 |
Average balance outstanding |  |  | 63,910 |  |  |  | 37,130 |
Maximum month-end balance |  |  | 114,025 |  |  |  | 68,359 |
Weighted-average rate at year-end |  |  | 1.36 | % |  |  | 0.61 | %
Weighted-average rate during the year |  |  | 1.18 | % |  |  | 0.89 | %
Schedule of Repurchase Agreements [Table Text Block] |
|  | Repurchase Agreements (Sweep) Accounted |
|  | for as Secured Borrowings |
(Dollar amounts in thousands) |  | Overnight and Continuous |
|  | December 31, 2017 |  |  | December 31, 2016 |
Repurchase agreements secured by: |  |  |  |  |  |  |  |
Mortgage-backed securities in government sponsored entities |  | $ | 2,040 |  |  | $ | 2,667 |
Tax-exempt obligations of states and political subdivisions |  |  | 495 |  |  |  | 968 |
Gross amount of pledged collateral |  |  | 2,535 |  |  |  | 3,635 |
Gross amount of recognized liabilities |  | $ | 1,989 |  |  | $ | 2,129 |

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- Definition The entire disclosure for repurchase agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(m)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Tabular disclosure of short-term debt arrangements (having initial terms of repayment within one year or the normal operating cycle, if longer) including: (1) description of the short-term debt arrangement; (2) identification of the lender or type of lender; (3) repayment terms; (4) weighted average interest rate; (5) carrying amount of funds borrowed under the specified short-term debt arrangement as of the balance sheet date; (6) description of the refinancing of a short-term obligation when that obligation is excluded from current liabilities in the balance sheet; and (7) amount of a short-term obligation that has been excluded from current liabilities in the balance sheet because of a refinancing of the obligation. + 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 210.5-02.19) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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