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Note 10 - Earnings Per Share (Tables)
3 Months Ended
Mar. 31, 2014
Earnings per Share: [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   

Three Months Ended

March 31,

 
   

2014

   

2013

 

Net Income

  $ 9,716     $ 10,112  
                 

Weighted-average number of basic shares outstanding during the period

    19,804       19,543  

Dilutive effect of stock options, restricted stock and RSUs

    473       332  

Weighted-average number of diluted shares outstanding during the period

    20,277       19,875  
                 

Basic earnings per share

  $ 0.49     $ 0.52  

Diluted earnings per share

  $ 0.48     $ 0.51