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Employee Benefit Plans - (Details) (USD $) In Thousands, unless otherwise specified | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 29, 2011 | Apr. 26, 2014 | Apr. 27, 2013 | Apr. 28, 2012
Compensation and Retirement Disclosure [Abstract] |  |  |  |
Percentage of matching contribution | 25.00% | 50.00% |  |
Maximum annual contribution percentage |  | 6.00% |  |
Award requisite service period |  | 1 year |  |
Minimum age attained for award |  | 21 years |  |
Minimum hours worked |  | 1000 hours |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |
Contributions |  | $ 1,859 | $ 1,713 | $ 1,618
Officers and Former Director |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |
Contributions |  | 23 | 23 | 23
Contribution plan, accrued interest |  | $ 522 | $ 629 |
Lump sum distribution period, option one |  | 5 years |  |
Lump sum distribution period, option two |  | 10 years |  |

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- Definition Defined Contribution Plan, Distribution Period Two + References No definition available. + Details
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- Definition Defined Contribution Plan, Hours Worked + References No definition available. + Details
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- Details
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- Definition The amount of the cost recognized during the period for defined contribution plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942 + Details
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- Definition Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan. + References No definition available. + Details
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