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Income Taxes (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Oct. 27, 2018 | Oct. 28, 2017 | Oct. 27, 2018 | Oct. 28, 2017
Income Tax Disclosure [Abstract] |  |  |  |
Unrecognized tax benefits that would affect our effective tax rate if recognized | $ 3,360 |  | $ 3,360 |
Effective Income Tax Rate Reconciliation, Percent | 5.80% | 24.60% | 0.00% | 27.50%
Tax Cuts and Jobs Act of 2017, Complete Accounting, Change in Tax Rate, Deferred Tax Asset, Provisional Income Tax Expense |  |  | $ 12 |

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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: 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 + Details
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- Definition The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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