Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2018	Mar. 25, 2017	Mar. 26, 2016
Cash flows from operating activities:
Net income	$ 161,995	$ 261,209	$ 123,630
Adjustments to net cash provided by operating activities:
Depreciation and amortization	81,399	63,433	58,060
Stock compensation expense	48,741	39,593	33,506
Deferred income taxes	11,646	10,885	23,202
Loss on retirement or write-off of long-lived assets	626	10,387	2,753
(Payments) charges for defined benefit pension plan	(10,929)	116	729
Excess tax benefit from employee stock awards	0	0	(3,850)
Other non-cash charges	(3,864)	8,980	19,702
Net change in operating assets and liabilities:
Accounts receivable, net	19,173	(31,442)	24,156
Inventories	(37,865)	(25,880)	(57,819)
Other assets	16,824	575	(1,522)
Accounts payable	143	1,772	(41,456)
Accrued salaries and benefits	(4,469)	18,951	(2,993)
Deferred income	0	0	(6,105)
Income taxes payable	22,983	10,969	(11,807)
Other accrued liabilities	12,308	203	(11,140)
Net cash provided by operating activities	318,711	369,751	149,046
Cash flows from investing activities:
Maturities and sales of available-for-sale marketable securities	138,221	212,863	125,660
Purchases of available-for-sale marketable securities	(238,434)	(231,432)	(22,570)
Purchases of property, equipment and software	(55,180)	(41,849)	(41,569)
Investments in technology	(29,323)	(9,447)	(4,519)
Acquisition of businesses, net of cash obtained	0	0	(36,759)
Net cash (used in) provided by investing activities	(184,716)	(69,865)	20,243
Cash flows from financing activities:
Principal payments on long-term revolver	(60,000)	(100,439)	(20,000)
Debt issuance costs	0	(2,152)	0
Payments on capital lease agreements	0	(699)	0
Issuance of common stock, net of shares withheld for taxes	4,417	16,518	6,617
Repurchase of stock to satisfy employee tax withholding obligations	(17,806)	(14,089)	(6,861)
Repurchase and retirement of common stock	(175,776)	(15,439)	(60,503)
Excess tax benefit from employee stock awards	0	0	3,850
Contingent consideration payments	(392)	(1,213)	0
Net cash used in financing activities	(249,557)	(117,513)	(76,897)
Net (decrease) increase in cash and cash equivalents	(115,562)	182,373	92,392
Cash and cash equivalents at beginning of period	351,166	168,793	76,401
Cash and cash equivalents at end of period	235,604	351,166	168,793
Cash payments during the year for:
Income taxes	34,385	8,001	23,785
Interest	$ 835	$ 2,947	$ 3,318