Quarterly report pursuant to Section 13 or 15(d)

Note 6 - Employee and Director Benefits (Tables)

v3.8.0.1
Note 6 - Employee and Director Benefits (Tables)
 9 Months Ended
Sep. 30, 2017
Notes Tables  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
    2017   2016
Expected volatility    
29.00
 %    
29.00
 %
Expected dividends    
0.44
 %    
0.64
 %
Expected term (in years)    
6.25
      
6.25
  
Risk-free rate    
2.08
 %    
1.86
 %
Share-based Compensation, Stock Options, Activity [Table Text Block]
    Shares   Weighted
Average
Exercise
Price
   Weighted
Average
Remaining
Contractual
Term (years)
   Aggregate
Intrinsic
Value
                (In Thousands)
Nine Months Ended September 30, 2017:                                
Outstanding at January 1, 2017    
2,026,334
     $
9.00
      
6.2
     $
57,636
  
Granted    
52,500
      
37.93
      
9.4
      
(35
 )
Exercised    
(359,000
 )    
4.97
      
4.2
      
11,590
  
Forfeited    
(32,000
 )    
21.96
      
8.4
      
489
  
Outstanding at September 30, 2017    
1,687,834
      
10.51
      
5.7
     $
45,136
  
                                 
Exercisable at September 30, 2017    
810,736
     $
5.22
      
4.2
     $
25,971
  
                                 
Nine Months Ended September 30, 2016:                                
Outstanding at January 1, 2016    
2,498,834
     $
6.66
      
6.3
     $
42,743
  
Granted    
234,000
      
19.98
      
9.5
      
1,398
  
Exercised    
(656,500
 )    
4.25
      
4.2
      
14,254
  
Forfeited    
(13,000
 )    
19.41
      
9.0
      
85
  
Outstanding at September 30, 2016    
2,063,334
      
8.86
      
6.5
     $
35,277
  
                                 
Exercisable at September 30, 2016    
594,536
     $
6.45
      
6.0
     $
13,901
  
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]
    Shares   Weighted
Average Grant
Date Fair Value
         
Nine Months Ended September 30, 2017:                
Non-vested at January 1, 2017    
118,676
     $
8.88
  
Granted    
7,000
      
38.02
  
Vested    
(4,200
 )    
15.74
  
Forfeited    
(800
 )    
15.74
  
Non-vested at September 30, 2017    
120,676
      
10.29
  
                 
Nine Months Ended September 30, 2016:                
Non-vested at January 1, 2016    
294,176
     $
6.44
  
Granted    
9,000
      
19.58
  
Vested    
(178,500
 )    
5.59
  
Forfeited    
-
      
-
  
Non-vested at September 30, 2016    
124,676
      
8.66