Note 13 - Disclosure about Fair Value of Financial Instruments (Tables)
 12 Months Ended
Dec. 31, 2016
Notes Tables  
Fair Value, by Balance Sheet Grouping [Table Text Block]
 
 
 
As of December 31,
 
 
 
 
2016
 
 
2015
 
(dollars in thousands)
Fair Value
Hierarchy
Level*
 
Carrying
Amount
 
 
Fair Value
 
 
Carrying
Amount
 
 
Fair Value
 
Financial assets:
                                  
Cash and cash equivalents
Level 1
   $
50,765
     $
50,765
     $
143,067
     $
143,067
  
Investment securities - available for sale
See Note 14
    
566,996
      
566,996
      
348,966
      
348,966
  
Investment securities - trading
See Note 14
    
3,888
      
3,888
      
3,950
      
3,950
  
Investment securities – held to maturity
Level 2
    
2,879
      
2,818
      
—
      
—
  
Loans held for sale
Level 2
    
9,621
      
9,621
      
8,987
      
8,987
  
Net portfolio loans and leases
Level 3
    
2,517,939
      
2,505,546
      
2,253,131
      
2,273,947
  
Mortgage servicing rights
Level 3
    
5,582
      
6,154
      
5,142
      
5,726
  
Other assets
Level 3
    
34,465
      
34,465
      
30,271
      
30,271
  
                                   
Total financial assets
  $
3,192,135
     $
3,180,253
     $
2,793,514
     $
2,814,914
  
                                 
Financial liabilities:
                                  
Deposits
Level 2
   $
2,579,675
     $
2,579,011
     $
2,252,725
     $
2,251,703
  
Short-term borrowings
Level 2
    
204,151
      
204,151
      
94,167
      
94,156
  
FHLB advances and other borrowings
Level 2
    
189,742
      
186,863
      
254,863
      
254,796
  
Subordinated notes
Level 2
    
29,532
      
29,228
      
29,479
      
27,453
  
Other liabilities
Level 2
    
37,303
      
37,303
      
34,052
      
34,052
  
                                 
Total financial liabilities
  $
3,040,403
     $
3,036,556
     $
2,665,286
     $
2,662,160