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Note 11 - Income Taxes (Tables)
6 Months Ended
Jun. 30, 2014
Income Tax Disclosure [Abstract]  
Summary of Income Tax Contingencies [Table Text Block]
   

Six Months Ended June 30,

 
   

2014

   

2013

 
   

(Dollars in thousands)

 
                 

Balance at beginning of period

  $ 4,950     $ 7,280  

Additions based on tax positions taken in prior years

    192       222  

Additions based on tax positions taken in current year

    447       852  

Balance at end of period

  $ 5,589     $ 8,354