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Note 20 - Financial Instruments with Off-Balance Sheet Risk (Tables)
12 Months Ended
Dec. 31, 2015
Disclosure Text Block Supplement [Abstract]  
Schedule of Fair Value, Off-balance Sheet Risks [Table Text Block]

(dollars in thousands)

 

2015

   

2014

 

Unfunded loan commitments

  $ 1,838,336     $ 1,625,957  

Unfunded lines of credit

    112,159       105,895  

Letters of credit

    83,511       75,615  

Total

  $ 2,034,006     $ 1,807,467