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Note 6 - Income Taxes (Details) (USD $) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012 | Dec. 31, 2012
Income Tax Disclosure [Abstract] |  |  |  |  |
Income Tax Expense Benefit Period Increase Decrease |  |  | $ 3,700,000 |  |
Income Tax Expense (Benefit) | 2,791,000 | 808,000 | 4,639,000 | 977,000 |
Effective Income Tax Rate Reconciliation, Percent |  |  | 33.32% | 10.51% |
Unrecognized Tax Benefits | 9,500,000 |  | 9,500,000 |  | 9,600,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate | 5,800,000 |  | 5,800,000 |  | 6,000,000
Unrecognized Tax Benefits In Long Term Liabilities | 2,900,000 |  | 2,900,000 |  |
Unrecognized Tax Benefits In Deferred Tax Assets | 7,100,000 |  | 7,100,000 |  |
Unrecognized Tax Benefits In Deferred Tax Asset Subject To Full Valuation Allowance | $ 3,700,000 |  | $ 3,700,000 |  |

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