Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Jul. 03, 2016	Jun. 28, 2015
Cash flows from operating activities:
Net income	$ 18,283	$ 2,556
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	10,010	10,616
Stock-based compensation	5,225	5,987
Deferred income taxes	(940)	3,400
Other non-cash items, net	(1,042)	539
Changes in operating assets and liabilities:
Accounts receivable	(18,885)	2,517
Inventories	3,171	(8,671)
Other assets	(235)	(134)
Accounts payable	6,793	2,218
Accrued compensation	(2,774)	(4,913)
Accrued taxes, net	(1,128)	(3,081)
Other liabilities	(783)	(1,567)
Net cash provided by operating activities	17,695	9,467
Cash flows from investing activities:
Purchases of available-for-sale securities	(61,661)	(50,639)
Proceeds from sales and maturities of available-for-sale securities	45,679	34,209
Purchases of property and equipment	(7,842)	(10,782)
Other investing activities	1,373
Net cash used in investing activities	(22,451)	(27,212)
Cash flows from financing activities:
Proceeds from issuance of common stock under stock-based awards	2,575	16,497
Minimum tax withholding paid on behalf of employees for restricted stock units	(4,126)	(5,062)
Purchases of treasury stock		(17,856)
Other financing activities	517	1,124
Net cash used in financing activities	(1,034)	(5,297)
Net decrease in cash and cash equivalents	(5,790)	(23,042)
Cash and cash equivalents at beginning of period	125,408	115,241
Cash and cash equivalents at end of period	$ 119,618	$ 92,199