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Employee Benefits - Total Costs Associated with Plans (Details) - USD ($) $ in Thousands | 12 Months Ended
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Apr. 30, 2022 | Apr. 24, 2021 | Apr. 25, 2020
401(k) Retirement Plan |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Labor and related expense | $ 11,763 | $ 7,313 | $ 9,380
Performance Compensation Retirement Plan |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Labor and related expense | 1,654 | 3,810 | 1,115
Deferred Compensation Plan |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Labor and related expense | 242 | 24 | 719
Non-Qualified Defined Benefit Retirement Plan |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Labor and related expense | $ 763 | $ 803 | $ 796

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- Definition Amount of expense for salary, wage, profit sharing; incentive and equity-based compensation; and other employee benefit. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(b)(4)) -URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227 + Details
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