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Note 10 - Income Taxes (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2016 | Mar. 31, 2015 | Dec. 31, 2015
Note 10 - Income Taxes (Details) [Line Items] |  |  |
Income Tax Expense (Benefit) | $ 22,675 | $ 21,364 |
Effective Income Tax Rate Reconciliation, Percent | 32.90% | 37.30% |
Income Taxes Receivable |  |  | $ 28,900
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member] | Earliest Tax Year [Member] |  |  |
Note 10 - Income Taxes (Details) [Line Items] |  |  |
Open Tax Year | 2012 |  |
State and Local Jurisdiction [Member] | California Franchise Tax Board [Member] | Earliest Tax Year [Member] |  |  |
Note 10 - Income Taxes (Details) [Line Items] |  |  |
Open Tax Year | 2008 |  |

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