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Income Taxes
6 Months Ended
Jun. 30, 2021
Income Tax Disclosure [Abstract]  
Income Taxes Income Taxes
Our income before income tax provision, income tax provision and effective tax rates were as follows:
 Three Months EndedSix Months Ended
(in thousands, except percentages)June 30,
2021
June 30,
2020
June 30,
2021
June 30,
2020
Income before income tax provision$128,860 $112,585 $176,483 $145,909 
Income tax provision 35,144 16,021 10,369 3,281 
Effective tax rate27.3 %14.2 %5.9 %2.2 %

Tax expense for the first half of 2021 and 2020 benefited due to increased stock compensation benefits, many of which were recognized discretely in the first quarter of each year. These benefits were partially offset by an increase in non-deductible compensation in 2021.