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Note 9 - Income Taxes (Details) - Reconciliation of Income Tax Expense (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Reconciliation of Income Tax Expense [Abstract]        
Income tax expense $ 876 $ 3,573 $ 1,735 $ 5,224
Effective income tax rate 35.50% 41.00% 37.70% 46.50%