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

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Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Includes selling, general and administrative expense.

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Amount of income (expense) related to nonoperating activities, classified as other.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Accumulated Other Comprehensive Income (Loss) - Components of Reclassification Out of Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Apr. 01, 2018	Dec. 31, 2017	Oct. 01, 2017	Jul. 02, 2017	Apr. 02, 2017	Jan. 01, 2017	Oct. 02, 2016	Jul. 03, 2016	Apr. 01, 2018	Apr. 02, 2017	Apr. 03, 2016
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest and other, net									$ 8,608	$ 5,822	$ 4,268
operating expense									371,369	310,297	285,015
Net income (loss)	$ 20,711	$ (68,241)	$ 18,680	$ 16,714	$ 30,209	$ 34,735	$ 24,591	$ 20,947	(12,136)	110,482	194,737
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income (loss)									(100)	363	(270)
Reclassification out of Accumulated Other Comprehensive Income \| Unrealized holding gain or loss on available-for-sale investments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest and other, net									(100)	363	345
Reclassification out of Accumulated Other Comprehensive Income \| Change in unrealized losses on post-employment and post-retirement benefit plans
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
operating expense									$ 0	$ 0	$ (615)