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Income Taxes (Tables)
12 Months Ended
Dec. 31, 2017
Income Taxes [Abstract]  
Components of Provision for Income Taxes
The components of the provision for income taxes, exclusive of tax effect of unrealized securities gains and losses, are as follows:

(in thousands)
 
2017
  
2016
  
2015
 
Current income tax expense
 
$
20,108
  
$
18,417
  
$
18,416
 
Deferred income tax expense
  
(259
)
  
701
   
115
 
Effect of Tax Cuts & Jobs Act (benefit)
  
(2,831
)
  
-
   
-
 
Total income tax expense
 
$
17,018
  
$
19,118
  
$
18,531
 
Reconciliation of Income Tax Expense at Statutory Rate to Actual Income Tax Expense
A reconciliation of income tax expense at the statutory rate to our actual income tax expense is shown below:

(in thousands)
 
2017
  
2016
  
2015
 
Computed at the statutory rate
 
$
23,979
   
35.00
%
 
$
23,262
   
35.00
%
 
$
22,737
   
35.00
%
Adjustments resulting from:
                        
Tax-exempt interest
  
(1,259
)
  
(1.84
)
  
(1,289
)
  
(1.94
)
  
(1,275
)
  
(1.96
)
Housing and new markets credits
  
(2,579
)
  
(3.76
)
  
(2,680
)
  
(4.03
)
  
(2,692
)
  
(4.14
)
Dividends received deduction
  
(129
)
  
(0.19
)
  
(136
)
  
(0.20
)
  
(128
)
  
(0.20
)
Bank owned life insurance
  
(492
)
  
(0.72
)
  
(518
)
  
(0.78
)
  
(549
)
  
(0.84
)
ESOP dividend deduction
  
(319
)
  
(0.47
)
  
(313
)
  
(0.47
)
  
(298
)
  
(0.46
)
Stock option exercises and restricted stock vesting
  
(170
)
  
(0.25
)
  
-
   
-
   
-
   
-
 
Effect of Tax Cuts & Jobs Act
  
(2,831
)
  
(4.13
)
  
-
   
-
   
-
   
-
 
Other, net
  
818
   
1.20
   
792
   
1.18
   
736
   
1.13
 
Total
 
$
17,018
   
24.84
%
 
$
19,118
   
28.76
%
 
$
18,531
   
28.53
%
Components of Net Deferred Tax Liability
The components of the net deferred tax liability as of December 31 are as follows:

(in thousands)
 
2017
  
2016
 
Deferred tax assets:
      
Allowance for loan and lease losses
 
$
7,592
  
$
12,577
 
Interest on nonperforming loans
  
560
   
806
 
Accrued expenses
  
442
   
1,883
 
Allowance for other real estate owned
  
1,322
   
1,898
 
Limited partnership investments
  
64
   
0
 
Unrealized losses on AFS securities
  
932
   
1,241
 
Other
  
204
   
282
 
Total deferred tax assets
  
11,116
   
18,687
 
         
Deferred tax liabilities:
        
Depreciation and amortization
  
(12,270
)
  
(20,287
)
FHLB stock dividends
  
(2,076
)
  
(3,460
)
Loan fee income
  
(263
)
  
(536
)
Mortgage servicing rights
  
(732
)
  
(1,202
)
Capitalized lease obligations
  
(14
)
  
(65
)
Limited partnership investments
  
0
   
(411
)
Other
  
(195
)
  
(562
)
Total deferred tax liabilities
  
(15,550
)
  
(26,523
)
         
Net deferred tax liability
 
$
(4,434
)
 
$
(7,836
)