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Commitments and Contingencies - Litigation (Details) - USD ($) $ in Thousands | Oct. 27, 2018 | Apr. 28, 2018
--- | --- | ---
Insurance Claims [Member] |  |
Loss Contingencies [Line Items] |  |
Loss Contingency, Estimate of Possible Loss | $ 1,529 | $ 1,904
Collectibility of Receivables [Member] |  |
Loss Contingencies [Line Items] |  |
Loss Contingency, Accrual, Current | $ 2,224 | $ 2,224

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- Definition Amount of loss contingency liability expected to be resolved within one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349 + Details
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