Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Sep. 27, 2015	Sep. 28, 2014
Cash flows from operating activities:
Net income	$ 4,794	$ 17,010
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	21,037	23,855
Stock-based compensation	7,921	10,275
Deferred income taxes	4,045	4,077
Asset impairments	1,237	1,011
Other non-cash items, net	98	810
Changes in operating assets and liabilities:
Accounts receivable	28,579	(20,287)
Inventories	(20,133)	(12,106)
Other assets	649	(840)
Accounts payable	92	6,162
Accrued compensation	(8,598)	(7,256)
Accrued taxes, net	(4,785)	(3,012)
Other liabilities	1,179	(7,930)
Net cash provided by operating activities	36,115	11,769
Cash flows from investing activities:
Purchases of available-for-sale securities	(93,765)	(84,318)
Proceeds from sales and maturities of available-for-sale securities	87,997	80,376
Purchases of property and equipment	(18,778)	(12,068)
Proceeds from disposition of assets held for sale	7,553
Net cash used in investing activities	(16,993)	(16,010)
Cash flows from financing activities:
Proceeds from issuance of common stock under stock-based awards	18,728	3,536
Minimum tax withholding paid on behalf of employees for restricted stock units	(5,566)	(3,450)
Purchases of treasury stock	(46,770)
Other financing activities	1,115	(173)
Net cash used in financing activities	(32,493)	(87)
Net decrease in cash and cash equivalents	(13,371)	(4,328)
Cash and cash equivalents at beginning of period	115,241	91,258
Cash and cash equivalents at end of period	$ 101,870	$ 86,930