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Note 11 - Income Taxes (Tables)
6 Months Ended
Jun. 30, 2013
Income Tax Disclosure [Abstract]  
Summary of Income Tax Contingencies [Table Text Block]
   

Six Months Ended June 30,

 
   

2013

   

2012

 
   

(Dollars in thousands)

 

Balance at beginning of period

  $ 7,280     $ 5,875  

Additions based on tax positions taken in prior years

    222       837  

Additions based on tax positions taken in current year

    852        

Balance at end of period

  $ 8,354     $ 6,712