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9. Income Taxes (Tables)
12 Months Ended
Dec. 31, 2020
Income Tax Disclosure [Abstract]  
Components of income tax expense (benefit)
(Dollars in thousands)                  
     2020      2019      2018  
Current expense   $ 3,049       2,972       2,546  
Deferred income tax expense     (560 )     164       78  
Total income tax   $ 2,489       3,136       2,624  
Schedule of effective income Tax rate reconciliation
(Dollars in thousands)                  
     2020      2019      2018  
Tax expense at statutory rate   $ 2,908       3,613       3,361  
State income tax, net of federal income tax effect     261       351       358  
Tax-exempt interest income     (649 )     (802 )     (990 )
Increase in cash surrender value of life insurance     (80 )     (81 )     (81 )
Nondeductible interest and other expense     46       40       23  
Other     3       15       (47 )
Total   $ 2,489       3,136       2,624  
Schedule of deferred tax assets and liabilities
(Dollars in thousands)            
     2020      2019  
Deferred tax assets:            
Allowance for loan losses   $ 2,276       1,535  
Accrued retirement expense     1,190       1,150  
Restricted stock     190       217  
Accrued bonuses     -       265  
Interest income on nonaccrual loans     1       2  
Lease liability     798       838  
Total gross deferred tax assets     4,455       4,007  
                 
Deferred tax liabilities:                
Deferred loan fees     284       343  
Accumulated depreciation     873       873  
Prepaid expenses     5       7  
ROU Asset     787       832  
Other     41       47  
Unrealized gain on available for sale securities     1,611       1,087  
Total gross deferred tax liabilities     3,601       3,189  
                 
Net deferred tax asset   $ 854       818