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Note 9 - Income Taxes (Detail) - Income Tax (Benefit) Expense (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Income before income tax expense (benefit) $ 13,669 $ 7,948 $ 23,917 $ 16,384
Income tax expense (benefit):        
Federal income tax expense (benefit) 1,669 (244) 2,683 (282)
State income tax expense 1,172 383 188 776
Total income tax expense $ 2,841 $ 139 $ 2,871 $ 494
Effective income tax rate 20.80% 1.70% 12.00% 3.00%