Income Taxes	3 Months Ended
Jan. 04, 2020
Income Tax Disclosure [Abstract]
Income Taxes	5. Income Taxes Income tax provisions for interim periods are based on estimated annual income tax rates, adjusted to reflect the effects of any significant infrequent or unusual items which are required to be discretely recognized within the current interim period. The effective tax rates in the periods presented are largely based upon the forecast pre-tax earnings mix and allocation of certain expenses in various taxing jurisdictions where the Company conducts its business, primarily the United States. Three Months The effective tax rate for the three month period ended January 4, 2020 was 36.3%, which differed from the 2019 statutory federal income tax rate of 21%. The difference is mainly due to normal tax rate items, such as federal and state tax credits (net of valuation allowance), which were partially offset by net non-deductible compensation expenses and other tax adjustments. The effective tax rate for the three month period ended December 29, 2018 was 17.1%, which differed from the statutory federal tax rate of 21%. The difference is mainly due to normal tax rate benefit items, such as federal and state tax credits (net of valuation allowance), which were partially offset by non-deductible share-based compensation expenses and other tax adjustments.

5. Income Taxes

Income tax provisions for interim periods are based on estimated annual income tax rates, adjusted to reflect the effects of any significant infrequent or unusual items which are required to be discretely recognized within the current interim period. The effective tax rates in the periods presented are largely based upon the forecast pre-tax earnings mix and allocation of certain expenses in various taxing jurisdictions where the Company conducts its business, primarily the United States.

Three Months

The effective tax rate for the three month period ended January 4, 2020 was 36.3%, which differed from the 2019 statutory federal income tax rate of 21%. The difference is mainly due to normal tax rate items, such as federal and state tax credits (net of valuation allowance), which were partially offset by net non-deductible compensation expenses and other tax adjustments.

The effective tax rate for the three month period ended December 29, 2018 was 17.1%, which differed from the statutory federal tax rate of 21%. The difference is mainly due to normal tax rate benefit items, such as federal and state tax credits (net of valuation allowance), which were partially offset by non-deductible share-based compensation expenses and other tax adjustments.