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Note 11 - Income Taxes (Tables)
3 Months Ended
Mar. 31, 2014
Income Tax Disclosure [Abstract]  
Summary of Income Tax Contingencies [Table Text Block]
   

Three Months Ended March 31,

 
   

2014

   

2013

 
   

(Dollars in thousands)

 

Balance at beginning of period

  $ 4,950     $ 7,280  

Additions based on tax positions taken in prior years

    76       104  

Additions based on tax positions taken in current year

    106       411  

Balance at end of period

  $ 5,132     $ 7,795