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Note 1 - Basis of Presentation (Tables)
 3 Months Ended
Mar. 31, 2017
Notes Tables  
Impact of New Accounting Pronouncement [Table Text Block]
   
Three Months Ended
March 31, 2016
  
   
As reported
    
As adjusted
  
Consolidated
Statement of Comprehensive Income
(unaudited)
  
 
 
 
  
 
 
 
Provision for income taxes
   $
5,837
     $
5,633
  
Net income
   $
9,687
     $
9,891
  
Comprehensive income, net of tax
   $
8,770
     $
8,974
  
Basic earnings per share
   $
0.51
     $
0.52
  
Diluted earnings per share
   $
0.50
     $
0.51
  
Diluted weighted average shares outstanding
    
19,293
      
19,273
  
                 
Consolidated
Statement of Cash Flows
(unaudited)
  
 
 
 
  
 
 
 
Net cash used in operating activities
   $
(13,581
)
   $
(13,377
)
Net cash provided by financing activities
   $
18,928
     $
18,724