Consolidated Condensed Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
Dec. 27, 2014	Dec. 28, 2013	Dec. 27, 2014	Dec. 28, 2013
Consolidated Condensed Statements of Comprehensive Income [Abstract]
Net income	$ 22,729us-gaap_NetIncomeLoss	$ 41,500us-gaap_NetIncomeLoss	$ 33,829us-gaap_NetIncomeLoss	$ 95,509us-gaap_NetIncomeLoss
Net changes to available-for-sale securities
Unrealized gain (loss) on marketable securities	(51)	(65)	91	151
Net changes to foreign currency derivatives
Reclassification of unrealized loss to net income	29
Benefit (provision) for income taxes	18	23	(32)
Comprehensive income	$ 22,725us-gaap_ComprehensiveIncomeNetOfTax	$ 41,458us-gaap_ComprehensiveIncomeNetOfTax	$ 33,888us-gaap_ComprehensiveIncomeNetOfTax	$ 95,660us-gaap_ComprehensiveIncomeNetOfTax

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount before tax and reclassification adjustments of unrealized holding gain (loss) on available-for-sale securities and unrealized holding gain (loss) related to transfers of securities into the available-for-sale classification and out of the held-to-maturity classification.

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Amount before tax of reclassification adjustment from accumulated other comprehensive income of accumulated gain (loss) realized from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's deferred hedging gain (loss).

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Amount of tax expense (benefit) allocated to other comprehensive income (loss) attributable to parent entity.

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