Consolidated Condensed Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2018	Jun. 24, 2017
Cash flows from operating activities:
Net income (loss)	$ (4,272)	$ 42,912
Adjustments to reconcile net income (loss) to net cash generated (used) by operating activities:
Depreciation and amortization	22,639	19,596
Stock compensation expense	12,794	11,403
Deferred income taxes	(371)	435
Loss on retirement or write-off of long-lived assets	314	152
Charges for defined benefit pension plan	0	658
Other non-cash adjustments	107	(3,940)
Net change in operating assets and liabilities:
Accounts receivable, net	(20,264)	(42,463)
Inventories	32,306	(34,534)
Other assets	(3,361)	(941)
Accounts payable and other accrued liabilities	(31,185)	194
Income taxes payable	(4,018)	2,712
Net cash generated (used) by operating activities	4,689	(3,816)
Cash flows from investing activities:
Maturities and sales of available-for-sale marketable securities	17,655	102,275
Purchases of available-for-sale marketable securities	(17,937)	(148,674)
Purchases of property, equipment and software	(10,827)	(10,749)
Investments in technology	(1,728)	(20,762)
Net cash used in investing activities	(12,837)	(77,910)
Cash flows from financing activities:
Principal payments on long-term revolver	0	(60,000)
Issuance of common stock, net of shares withheld for taxes	60	1,889
Repurchase of stock to satisfy employee tax withholding obligations	(1,057)	(1,861)
Repurchase and retirement of common stock	(40,000)	(45,550)
Net cash used in financing activities	(40,997)	(105,522)
Net decrease in cash and cash equivalents	(49,145)	(187,248)
Cash and cash equivalents at beginning of period	235,604	351,166
Cash and cash equivalents at end of period	$ 186,459	$ 163,918