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Note 10 - Income Taxes (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014 | Dec. 31, 2014
Income Tax Disclosure [Abstract] |  |  |  |  |
Income Tax Expense (Benefit) | $ 9,738 | $ 20,741 | $ 31,102 | $ 38,631 |
Effective Income Tax Rate Reconciliation, Percent |  |  | 27.70% | 36.80% |
Income Taxes Receivable |  |  |  |  | $ 18,100

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