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Note 11 - Income Taxes (Tables)
9 Months Ended
Sep. 30, 2015
Income Tax Disclosure [Abstract]  
Summary of Income Tax Contingencies [Table Text Block]
   

Nine Months Ended

September 30,

 
   

2015

   

2014

 
   

(Dollars in thousands)

 

Balance at beginning of year

  $ 7,511     $ 4,950  

Additions based on tax positions taken in prior years

    43       93  

Additions based on tax positions taken in the current year

    825       563  

Reduction based on tax positions taken in prior years

    (1,267 )      

Balance at end of year

  $ 7,112     $ 5,606