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Income Taxes (Tables)
12 Months Ended
Dec. 31, 2021
Income Tax Disclosure [Abstract]  
Schedule of federal and state income tax expense
Federal and state income tax expense consists of the following for the years ended December 31:

(dollars in thousands)202120202019
Current federal income tax expense$39,865 $40,201 $39,756 
Current state income tax expense15,348 12,059 14,153 
Total current tax expense55,213 52,260 53,909 
Deferred federal income tax expense (benefit)5,185 (5,212)78 
Deferred state income tax benefit585 (3,120)(139)
Total deferred tax benefit5,770 (8,332)(61)
Total income tax expense$60,983 $43,928 $53,848 
Schedule of significant components of deferred tax assets and liabilities The table below summarizes significant components of our deferred tax assets and liabilities as of December 31, 2021 and 2020:
(dollars in thousands)20212020
Deferred tax assets    
Allowance for credit losses$19,736 $28,118 
Deferred loan fees and costs6,559 8,104 
Leases9,283 7,183 
Stock-based compensation1,132 828 
Net operating loss7,623 6,896 
Unrealized loss on securities available-for-sale4,900 — 
Unrealized loss on interest rate swap derivatives— 132 
SERP5,631 2,495 
Premises and equipment1,328 879 
Other assets2,098 1,982 
Valuation allowances(6,724)(5,845)
Total deferred tax assets51,566 50,772 
Deferred tax liabilities
Unrealized net gain on securities available-for-sale— (5,519)
Excess servicing(402)(206)
Intangible assets— — 
Leases(7,990)(6,470)
Other liabilities— (6)
Total deferred tax liabilities(8,392)(12,201)
Net deferred income tax assets$43,174 $38,571 
Schedule of reconciliation of the statutory federal income tax rate to effective income tax rate
A reconciliation of the statutory federal income tax rate to the Company’s effective income tax rate for the years ended December 31 2021, 2020, and 2019 follows:
202120202019
Statutory federal income tax rate21.00 %21.00 %21.00 %
Increase (decrease) due to:
State income taxes5.45 %5.04 %5.49 %
Tax exempt interest and dividend income(0.91)%(0.75)%(0.69)%
Stock-based compensation expense0.44 %0.25 %1.15 %
Other(0.32)%(0.63)%0.46 %
Effective tax rate25.66 %24.91 %27.41 %