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Fair Value Measurements (Details) (USD $) In Thousands, unless otherwise specified	Oct. 25, 2014	Jul. 26, 2014	Apr. 26, 2014
Assets
Transfers from Level 1 to Level 2		$ 0	$ 0
Transfers from Level 2 to Level 1	0		0
Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring
Assets
Available-for-sale Securities	1,194		1,521
Total	1,194		1,521
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring
Assets
Available-for-sale Securities	58,226		57,630
Trading securities	493		1,787
Total	$ 58,719		$ 59,417

X

- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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- Definition

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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Amount of transfers of assets measured on a recurring basis out of Level 1 of the fair value hierarchy into Level 2.

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Amount of transfers of assets measured on a recurring basis out of Level 2 of the fair value hierarchy into Level 1.

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Amount of investments in debt and equity securities and other forms of securities that provide ownership interests classified as trading.

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