Note 18 - Income Taxes (Tables)
12 Months Ended
Dec. 31, 2016
Notes Tables  
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
 
 
December 31,
 
(dollars in thousands)
 
2016
 
 
2015
 
Deferred tax assets:
               
Loan and lease loss reserve
  $
6,492
    $
5,872
 
Other reserves
   
3,611
     
5,509
 
Net operating loss carry-forward
   
471
     
927
 
Alternative minimum tax credits
   
567
     
567
 
Unrealized depreciation of available for sale securities
   
663
     
 
Defined benefit plans
   
2,068
     
1,851
 
Total deferred tax asset
   
13,872
     
14,726
 
Deferred tax liabilities:
               
Other reserves
   
52
     
461
 
Originated MSRs
   
1,969
     
1,800
 
Amortizing fair value adjustments
   
1,336
     
911
 
Unrealized appreciation of available for sale securities
   
     
417
 
Total deferred tax liability
   
3,357
     
3,589
 
Total net deferred tax asset
  $
10,515
    $
11,137
 
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
(dollars in thousands)
 
2016
 
 
2015
 
 
2014
 
Current
  $
16,492
    $
12,006
    $
12,655
 
Deferred
   
1,676
     
(2,834
)
   
2,350
 
Total
  $
18,168
    $
9,172
    $
15,005
 
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
(dollars in thousands)
 
2016
 
 
Tax
Rate
 
 
2015
 
 
Tax
Rate
 
 
2014
 
 
Tax
Rate
 
Computed tax expense at statutory federal rate
  $
18,972
     
35.0
%
  $
9,074
     
35.0
%
  $
14,997
     
35.0
%
Tax-exempt income
   
(758
)
   
(1.4
)
   
(622
)
   
(2.4
)
   
(401
)
   
(0.9
)
State tax (net of federal tax benefit)
   
425
     
0.8
     
299
     
1.2
     
215
     
0.5
 
Non-deductible merger expense
   
     
     
105
     
0.4
     
105
     
0.2
 
Excess tax benefit – stock based compensation
   
(565
)
   
(1.0
)
   
     
     
     
 
Other, net
   
94
     
0.1
     
316
     
1.2
     
89
     
0.2
 
Total income tax expense
  $
18,168
     
33.5
%
  $
9,172
     
35.4
%
  $
15,005
     
35.0
%