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Fair Value Measurements (Tables) | 6 Months Ended
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Oct. 26, 2013
Fair Value Measurements [Abstract] |
Schedule of assets measured at fair value on recurring basis | The following table presents the fair value hierarchy for those assets measured at fair value on a recurring basis at October 26, 2013, and April 27, 2013:
As of October 26, 2013 |  |  |
|  | Fair Value Measurements |
(Unaudited, amounts in thousands) |  | Level 1(a) |  |  | Level 2(a) |  |  | Level 3 |
Assets |  |  |  |  |  |  |  |  |
Available-for-sale securities |  | $ | 3,640 |  |  | $ | 41,024 |  |  | $ | — |
Trading securities |  |  | — |  |  |  | 1,439 |  |  |  | — |
Total |  | $ | 3,640 |  |  | $ | 42,463 |  |  | $ | — |
| (a) | There were no transfers between Level 1 and Level 2 during fiscal 2014.
As of April 27, 2013 |  |
| Fair Value Measurements |
(Unaudited, amounts in thousands) | Level 1(b) |  | Level 2(b) |  | Level 3 |
Assets |  |  |  |  |  |
Available-for-sale securities |  | $ | 1,217 |  |  | $ | 38,747 |  |  | $ | — |
Trading securities |  |  | — |  |  |  | 1,126 |  |  |  | — |
Total |  | $ | 1,217 |  |  | $ | 39,873 |  |  | $ | — |
| (b) | There were no transfers between Level 1 and Level 2 during fiscal 2013.

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- Definition Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19190-110258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 6 -Footnote 4 -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. + Details
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