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Note 18 - Financial Instruments with Off-Balance Sheet Risk (Tables)
12 Months Ended
Dec. 31, 2014
Disclosure Text Block Supplement [Abstract]  
Schedule of Fair Value, Off-balance Sheet Risks [Table Text Block]

(dollars in thousands)

 

2014

   

2013

 

Unfunded loan commitments

  $ 1,625,957     $ 1,150,556  

Unfunded lines of credit

    105,895       79,786  

Letters of credit

    75,615       51,768  

Total

  $ 1,807,467     $ 1,282,110