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Income Taxes
9 Months Ended
Sep. 26, 2020
Income Tax Disclosure [Abstract]  
Income Taxes Income Taxes
The Corporation's tax provision for interim periods is determined using an estimate of its annual effective tax rate, adjusted for discrete items. The following table summarizes the Corporation's income tax provision (dollars in thousands):
Three Months EndedNine Months Ended
September 26,
2020
September 28,
2019
September 26,
2020
September 28,
2019
Income before income taxes$37,245 $58,451 $24,605 $80,786 
Income taxes$6,558 $12,375 $5,259 $17,878 
Effective tax rate17.6 %21.2 %21.4 %22.1 %

The Corporation's effective tax rate was lower in the three and nine months ended September 26, 2020 compared to the same periods last year, primarily due to the effect of tax credits on lower projected worldwide full year income.

On March 27, 2020, the Coronavirus Aid, Relief and Economic Security Act ("CARES Act") was enacted in response to the COVID-19 pandemic crisis. The CARES Act contains provisions relating to net operating loss carryback periods, alternative minimum tax credit refunds, modifications to the net interest deduction limitations and technical corrections to tax depreciation methods for qualified improvement property. The deferred tax benefit is estimated to be $0.9 million related to changes in tax depreciation for qualified improvement property.