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Note 11 - Income Taxes (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Dec. 31, 2015 | Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014 | Dec. 31, 2014
Note 11 - Income Taxes (Details) [Line Items] |  |  |  |  |  |
Income Tax Expense (Benefit) |  | $ 12,098 | $ 22,313 | $ 43,200 | $ 60,944 |
Effective Income Tax Rate Reconciliation, Percent |  |  |  | 26.50% | 37.30% |
Income Taxes Receivable |  |  |  |  |  | $ 18,100
Scenario, Forecast [Member] |  |  |  |  |  |
Note 11 - Income Taxes (Details) [Line Items] |  |  |  |  |  |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 27.00% |  |  |  |  |

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