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Income Taxes (Details) - USD ($) $ in Thousands | 4 Months Ended
--- | ---
Jan. 21, 2018 | Jan. 22, 2017
Income Tax Disclosure [Abstract] |  |  |
Income tax expense at statutory rate, amount |  | $ 17,192 | $ 21,740
Income tax expense at statutory rate |  | 28.60% | 38.60%
Tax Cuts and Jobs Act of 2017, Income Tax Expense (Benefit) |  | $ 30,627 | $ 0
One-time, non-cash impact of the Tax Act, percent |  | 51.00% | 0.00%
Stock compensation excess tax benefit, amount |  | $ (802) | $ 0
Stock compensation excess tax benefit, percent |  | (1.30%) | 0.00%
Other, amount |  | $ 121 | $ 91
Other, percent |  | 0.20% | 0.20%
Effective income tax rate, amount |  | $ 47,138 | $ 21,831
Effective income tax rates, percent | [1] | 78.50% | 38.70%
[1] | (1)Percentages may not add due to rounding.

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- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the income tax rates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319 + Details
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