Note 10 - Short-term Borrowings and Long-term FHLB Advances (Tables)
 12 Months Ended
Dec. 31, 2016
Notes Tables  
Schedule of Short-term Debt [Table Text Block]
 
 
As of December 31,
 
(dollars in thousands)
 
2016
 
 
2015
 
Repurchase agreements* – commercial customers
   $
39,151
     $
29,156
  
Repurchase agreement – correspondent bank
    
—
      
5,011
  
Short-term FHLB advances
    
165,000
      
30,000
  
Overnight federal funds
   
—
      
30,000
  
Total short-term borrowings
  $
204,151
     $
94,167
  
Schedule of Additional Information on Short Term Borrowings [TableText Block]
 
 
As of or Twelve Months Ended
December 31,
 
(dollars in thousands)
 
2016
 
 
2015
 
Balance at period-end
   $
204,151
     $
94,167
  
Maximum amount outstanding at any month end
   $
204,151
     $
94,167
  
Average balance outstanding during the period
   $
37,041
     $
36,010
  
Weighted-average interest rate:
                
As of the period-end
   
0.66
%
    
0.56
%
Paid during the period
   
0.25
%
    
0.13
%
Schedule of Maturities of Long-term Debt [Table Text Block]
 
 
As of December 31,
 
(dollars in thousands)
 
2016
 
 
2015
 
Within one year
   $
75,000
     $
75,000
  
Over one year through five years
   
114,742
      
179,863
  
Total
  $
189,742
     $
254,863
  
Schedule of Federal Home Loan Bank Advances and Other Borrowings Maturities [Table Text Block]
 
Maturity Range*
 
 
Weighted Average
 
 
Coupon
Rate
 
 
Balance at December 31,
 
Description
From
 
To
 
 
Rate
 
 
From
 
 
To
 
 
2016
 
 
2015
 
Bullet maturity – fixed rate
02/01/17
  
12/09/20
      
1.44
%
    
0.80
%
    
2.13
%
    
153,612
      
198,612
  
Bullet maturity – variable rate
11/28/17
  
11/28/17
      
1.08
%
    
1.08
%
    
1.08
%
    
15,000
      
35,000
  
Convertible-fixed
01/03/18
  
08/20/18
      
2.94
%
    
2.58
%
    
3.50
%
    
21,130
      
21,251
  
Total
 
  
 
      
 
      
 
      
 
     $
189,742
     $
254,863