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Note 10 - Income Taxes (Details) (USD $) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013 | Dec. 31, 2013
Income Tax Disclosure [Abstract] |  |  |  |  |
Income Tax Expense (Benefit) | $ 22,313,000 | $ 19,029,000 | $ 60,944,000 | $ 52,489,000 |
Effective Income Tax Rate Reconciliation, Percent |  |  | 37.30% | 36.50% |
Income Tax Refund Receivable |  |  |  |  | $ 8,600,000

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