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Note 11 - Earnings Per Share (Tables)
6 Months Ended
Jun. 30, 2014
Earnings per Share: [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   

Three Months Ended

June 30,

   

Six Months Ended

June 30,

 
   

2014

   

2013

   

2014

   

2013

 

Net Income

  $ 9,998     $ 10,331     $ 19,714     $ 20,443  
                                 

Weighted-average number of basic shares outstanding during the period

    19,795       19,706       19,799       19,625  

Dilutive effect of stock options, restricted stock and RSUs

    287       290       414       368  

Weighted-average number of diluted shares outstanding during the period

    20,082       19,996       20,213       19,993  
                                 

Basic earnings per share

  $ 0.51     $ 0.52     $ 1.00     $ 1.04  

Diluted earnings per share

  $ 0.50     $ 0.52     $ 0.98     $ 1.02