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Income Tax (Tables)
12 Months Ended
Dec. 31, 2020
Income Tax Disclosure [Abstract]  
Reconciliation of Federal Statutory to Actual Tax Expense
The reconciliation between income tax expense expected at the U.S. federal statutory tax rate and the reported income tax expense is summarized in the following table for years ended December 31, 2020, 2019 and 2018:
202020192018
Reconciliation of Federal Statutory to Actual Tax Expense:   
Federal Statutory Income Tax at 21%$35,695 $40,695 $39,509 
Tax-exempt Interest Income(13,273)(10,124)(8,347)
Stock Compensation338 (459)(622)
Earnings on Life Insurance(1,079)(953)(868)
Tax Credits(425)(263)(615)
CARES Act - NOL carryback rate differential(1,178)— — 
State Tax1,122 600 (1,219)
Other175 (171)1,161 
Income Tax Expense$21,375 $29,325 $28,999 
Effective Tax Rate12.6 %15.1 %15.4 %
Components of Income Tax Expense (Benefit)
Income tax expense consists of the following components for the years ended December 31, 2020, 2019, 2018:
 202020192018
Income Tax Expense for the Year Ended December 31:  
Currently Payable:  
Federal$28,463 $23,938 $23,633 
State2,647 422 1,842 
Deferred:
Federal(8,508)4,726 6,723 
State(1,227)239 (3,199)
Income Tax Expense$21,375 $29,325 $28,999 
Deferred Tax Assets and Liabilities
Significant components of the net deferred tax assets and liabilities resulting from temporary differences were as follows at December 31, 2020 and 2019:
 20202019
Deferred Tax Asset at December 31:  
Assets:  
Differences in Accounting for Loan Losses$31,850 $19,717 
Differences in Accounting for Loan Fees4,328 442 
Deferred Compensation4,038 4,436 
Federal & State Income Tax Loss Carryforward and Credits2,089 6,205 
Other3,185 3,499 
Total Assets45,490 34,299 
Liabilities:  
Differences in Depreciation Methods6,028 5,240 
Differences in Accounting for Loans and Securities2,840 1,192 
Difference in Accounting for Pensions and Other Employee Benefits1,258 1,556 
State Income Tax1,059 778 
Net Unrealized Gain on Securities Available for Sale23,389 10,333 
Gain on FDIC Modified Whole Bank Transaction359 413 
Other6,209 6,506 
Total Liabilities41,142 26,018 
Net Deferred Tax Asset$4,348 $8,281