Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 25, 2017	Mar. 26, 2016	Mar. 28, 2015
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Rent expense	$ 8,200	$ 5,200	$ 4,000
Sublease rental income	400	300	$ 100
Total property, plant and equipment	290,096	252,173
Accumulated depreciation	121,957	89,517
Assets Held under Capital Leases [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Total property, plant and equipment		1,000
Accumulated depreciation		$ 300
Foundry Commitments [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Non-cancelable purchase commitments	182,300
Assembly Purchase Order Commitments [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Non-cancelable purchase commitments	3,600
Outside Test Services Commitments [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Non-cancelable purchase commitments	14,500
Long-term Other Purchase Obligation [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Non-cancelable purchase commitments	$ 21,600