CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Jan. 26, 2013	Jan. 28, 2012
Operating activities:
Net income	$ 146,710	$ 150,672
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	19,137	18,442
Amortization	14,170	11,990
ESOP compensation	17,100	544
Stock-based compensation	10,985	9,428
Excess tax benefits from stock-based compensation	(849)	(608)
Bad debt expense	492	2,216
Change in assets and liabilities, net of acquired	(28,409)	35,978
Net cash provided by operating activities	179,336	228,662
Investing activities:
Additions to property and equipment, net	(14,259)	(25,051)
Acquisitions and equity investments, net	(14,650)	(14,193)
Net cash used in investing activities	(28,909)	(39,244)
Financing activities:
Dividends paid	(43,745)	(39,800)
Repurchases of common stock	(140,468)	(323,519)
Proceeds from issuance of long-term debt		325,000
ESOP activity	(1,514)	(1,307)
Debt issuance cost		(1,862)
Common stock issued, net	9,875	10,496
Retirement of long-term debt	(75,000)
Excess tax benefits from share-based compensation	849	608
Net cash used in financing activities	(250,003)	(30,384)
Effect of exchange rate changes on cash	(1,756)	(9,607)
Net increase (decrease) in cash and cash equivalents	(101,332)	149,427
Cash and cash equivalents at beginning of period	573,781	388,665
Cash and cash equivalents at end of period	$ 472,449	$ 538,092