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Note 6 - Interest Rate Swap Derivatives (Details) | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2015 USD ($) | Sep. 30, 2015 USD ($) | Dec. 31, 2014 | Sep. 30, 2014 USD ($)
Note 6 - Interest Rate Swap Derivatives (Details) [Line Items] |  |  |  |
Derivative, Number of Instruments Held |  |  | 0 | 0
Derivative, Notional Amount | $ 53,000,000 | $ 53,000,000 |  | $ 30,700,000
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net | $ 0 |  |  |
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred |  | $ 1,460,000 |  |
Interest Rate Swap [Member] |  |  |  |
Note 6 - Interest Rate Swap Derivatives (Details) [Line Items] |  |  |  |
Derivative, Number of Instruments Held | 3 | 3 |  |
Derivative, Notional Amount | $ 250,000,000 | $ 250,000,000 |  |
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimate of Time to Transfer |  | 12 months |  |

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- Definition The portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments representing (a) the amount of the hedge ineffectiveness and (b) the amount, if any, excluded from the assessment of hedge effectiveness. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 25 -Section 50 -Paragraph 1 -Subparagraph (a)(1),(2) -URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986 + Details
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