CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2021	Apr. 24, 2021	Oct. 24, 2020	Jul. 25, 2020
Statement of Cash Flows [Abstract]
Net income (loss)	$ 33,802	$ 28,514	$ 53,826	$ 24,202
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation	10,977			10,562
Amortization	9,541			9,305
Gains on investments	(87,827)			0
Non-cash employee compensation	7,839			9,583
Non-cash losses (gains) and other, net	3,385			503
Change in assets and liabilities:
Receivables	(206,199)			(153,113)
Inventory	30,750			(118,630)
Accounts payable	(15,974)			(317,032)
Accrued liabilities	208			48,521
Other changes from operating activities, net	(38,423)			19,031
Net cash used in operating activities	(313,421)			(229,808)
Investing activities:
Additions to property and equipment	(7,717)			(6,439)
Cash collections on DPP receivable	315,217			139,466
Acquisitions, net of cash acquired	(19,793)			0
Sale of investments	57,245			396
Net cash provided by investing activities	344,952			133,423
Financing activities:
Dividends paid	(25,138)			0
(Payment) draw on revolving credit	(11,000)			136,000
Other financing activities	(1,897)			(722)
Net cash (used in) provided by financing activities	(38,035)			135,278
Effect of exchange rate changes on cash	190			2,724
Net change in cash and cash equivalents	(6,314)			41,617
Cash and cash equivalents at beginning of period	143,244		$ 119,561	77,944
Cash and cash equivalents at end of period	136,930	$ 143,244		119,561
Supplemental disclosure of non-cash investing activity:
Noncash investments acquired	$ 286,607			$ 201,861