CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Jan. 26, 2019	Jan. 27, 2018
Statement of Cash Flows [Abstract]
Net income (loss)	$ 55,191	$ 180,046
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	33,317	33,672
Amortization	29,108	29,115
Bad debt expense	4,592	4,471
Non-cash employee compensation	22,282	22,999
Deferred income taxes	5,840	(38,299)
Deferred consideration in securitized receivables	(308,592)	(37,068)
Change in assets and liabilities, net of acquired	234,606	(154,923)
Net cash provided by operating activities	76,344	40,013
Investing activities:
Additions to property and equipment	(33,926)	(28,239)
Collection of deferred purchase price receivables	308,592	37,068
Other investing activities	2,875	10,600
Net cash provided by investing activities	277,541	19,429
Financing activities:
Dividends paid	(74,731)	(74,641)
Repurchases of common stock	0	(87,500)
Retirement of long-term debt	(244,010)	(7,377)
Draw on revolving credit	13,000	120,000
Other financing activities	6,228	7,546
Net cash used in financing activities	(299,513)	(41,972)
Effect of exchange rate changes on cash	75	5,576
Net change in cash and cash equivalents	54,447	23,046
Cash and cash equivalents at beginning of period	62,984	94,959
Cash and cash equivalents at end of period	$ 117,431	$ 118,005