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Income Taxes (Tables)
12 Months Ended
Dec. 31, 2022
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)202220212020
Current federal income tax expense$37,182 $39,865 $40,201 
Current state income tax expense5,008 15,348 12,059 
Total current tax expense42,190 55,213 52,260 
Deferred federal income tax expense (benefit)3,532 5,185 (5,212)
Deferred state income tax benefit3,028 585 (3,120)
Total deferred tax expense (benefit)6,560 5,770 (8,332)
Total income tax expense$48,750 $60,983 $43,928 
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, 2022 and 2021:
(dollars in thousands)20222021
Deferred tax assets    
Allowance for credit losses$18,490 $19,736 
Deferred loan fees and costs6,736 6,559 
Leases7,195 9,283 
Stock-based compensation1,796 1,132 
Net operating loss7,736 7,623 
Unrealized loss on securities available-for-sale50,442 4,987 
Unrealized loss on securities held-to-maturity14,366 — 
SERP2,495 5,631 
Premises and equipment(205)1,328 
Other assets1,344 2,011 
Valuation allowances(7,008)(6,724)
Total deferred tax assets103,387 51,566 
Deferred tax liabilities
Excess servicing(589)(402)
Leases(6,034)(7,990)
Other liabilities(197)— 
Total deferred tax liabilities(6,820)(8,392)
Net deferred income tax assets$96,567 $43,174 
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, 2022, 2021 and 2020 follows:
202220212020
Statutory federal income tax rate21.00 %21.00 %21.00 %
Increase (decrease) due to:
State income taxes3.28 %5.45 %5.04 %
Non-deductible fines and penalties2.54 %— %— %
Tax-exempt interest and dividend income(1.57)%(0.91)%(0.75)%
Stock-based compensation expense0.19 %0.44 %0.25 %
Other0.26 %(0.32)%(0.63)%
Effective tax rate25.70 %25.66 %24.91 %