Income Taxes	6 Months Ended
Apr. 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. In periods where our operating income approximates or is equal to break-even, the effective tax rates for quarter-to-date and full-year periods may not be meaningful due to discrete period items. On March 27, 2020 the President of the United States signed the Coronavirus Aid, Relief and Economic Security Act ("CARES Act") into law. While the CARES Act has broad income tax implications for many companies, it did not have a material impact on our reported income tax accounts. Three Months The effective tax rate for the three-month period ended April 4, 2020 was 70.0%, which differed from the statutory federal income tax rate of 21%. The difference is mainly due to discrete period tax benefit from share-based compensation expenses, but also due to normal tax rate items, such as the benefit from 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 March 30, 2019 was 14.4%, 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. Six Months The effective tax rate for the six-month period ended April 4, 2020 was 55.4% and differed from the statutory federal tax rate of 21%. The difference is mainly due to discrete period tax benefit from share-based compensation expenses, but also due to normal tax rate items, such as the benefit from 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 six-month period ended March 30, 2019 was 15.8% and differed from the statutory federal income tax rate of 21%. The difference is mainly due to normal tax rate benefit items, primarily 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. In periods where our operating income approximates or is equal to break-even, the effective tax rates for quarter-to-date and full-year periods may not be meaningful due to discrete period items.

On March 27, 2020 the President of the United States signed the Coronavirus Aid, Relief and Economic Security Act ("CARES Act") into law. While the CARES Act has broad income tax implications for many companies, it did not have a material impact on our reported income tax accounts.

Three Months

The effective tax rate for the three-month period ended April 4, 2020 was 70.0%, which differed from the statutory federal income tax rate of 21%. The difference is mainly due to discrete period tax benefit from share-based compensation expenses, but also due to normal tax rate items, such as the benefit from 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 March 30, 2019 was 14.4%, 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.

Six Months

The effective tax rate for the six-month period ended April 4, 2020 was 55.4% and differed from the statutory federal tax rate of 21%. The difference is mainly due to discrete period tax benefit from share-based compensation expenses, but also due to normal tax rate items, such as the benefit from 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 six-month period ended March 30, 2019 was 15.8% and differed from the statutory federal income tax rate of 21%. The difference is mainly due to normal tax rate benefit items, primarily federal and state tax credits (net of valuation allowance), which were partially offset by non-deductible share-based compensation expenses and other tax adjustments.