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Supplemental Cash Flow Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Oct. 26, 2012	Oct. 28, 2011	Oct. 26, 2012	Oct. 28, 2011
Supplemental Cash Flow Information [Abstract]
Income Taxes Paid, Net	$ 23,621	$ 16,381	$ 33,985	$ 29,414
Interest Paid, Net	$ 1,746	$ 1,993	$ 3,865	$ 4,161

The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

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- Definition

The amount of cash paid for interest during the period net of cash paid for interest that is capitalized.

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