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Other Assets - Narrative (Detail) (Other assets [Member], USD $) | 6 Months Ended |
--- | --- | ---
Oct. 28, 2012 | Oct. 30, 2011 | Apr. 29, 2012
Other Assets Noncurrent [Line Items] |  |  |
Number of life insurance contracts owned | 4 |  | 4
Life insurance contracts, death benefits to insured | $ 12,900,000 |  | $ 12,900,000
Non-compete agreement from Bodet & Horst [Member] |  |  |
Other Assets Noncurrent [Line Items] |  |  |
Useful life | 6 years |  |
Quarterly payments | 12,500 |  |
Total remaining non-compete payments | 87,500 |  |
Non-compete agreements [Member] |  |  |
Other Assets Noncurrent [Line Items] |  |  |
Gross carrying amount | 1,100,000 |  | 1,100,000
Accumulated amortization | 840,000 |  | 741,000
Amortization expense | 99,000 | 99,000 |
Remaining amortization expense for the remaining fiscal year | 99,000 |  |
Remaining amortization expense for the second fiscal year | 198,000 |  |
Remaining amortization expense for the third fiscal year | $ 49,000 |  |
Weighted average remaining amortization period | 1.8 years |  |

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph a(2) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275 + Details
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