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Note 2 - Mergers and Acquisitions (Tables)
12 Months Ended
Dec. 31, 2014
Business Combinations [Abstract]  
Certain Loans Acquired in Transfer [Table Text Block]

(dollars in thousands)

       
         

Accounted for under ASC 310-30:

       

Contractual principal balance at acquisition

  $ 4,448  

Contractual cash flows not expected to be collected (nonaccretable discount)

    1,191  

Expected cash flows at acquisition at acquisition

    3,257  

Interest component of expected cash flows (accretable discount)

    -  

Fair value at acquisition

  $ 3,257  
         

Excluded under ASC 310-30 accounting:

       

Unpaid principal balance

  $ 812,681  

Fair value discount

    11,618  

Fair value at acquisition

    801,063  

Total fair value at acquisition

  $ 804,320  
Business Acquisition, Pro Forma Information [Table Text Block]
   

For the years ended December 31,

 

(dollars in thousands)

 

2014

   

2013

 
                 
                 

Net interest income

  $ 206,721     $ 174,509  

Net income

    58,756       55,973  

Earnings per share:

               

Basic

  1.89     1.86  

Diluted

  1.82     1.81