Acquisition Acquisition (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended		12 Months Ended
	Jun. 24, 2018	Mar. 25, 2018	Sep. 25, 2016	Mar. 31, 2019	Mar. 25, 2018	Jun. 24, 2018	Mar. 06, 2018	Jun. 25, 2017
Purchase Price Allocation [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		13 years 9 months 16 days
Business Acquisition, Goodwill, Expected Tax Deductible Amount							$ 245,000
Business Acquisition, Transaction Costs	$ 3,800			$ 134		$ 3,800
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory							22,500
Business Acquisition, Date of Acquisition Agreement		Mar. 06, 2018
Business Acquisition, Name of Acquired Entity		Infineon Technologies AG (Infineon) Radio Frequency Power Business (RF Power)
Business Combination, Consideration Transferred	2,000					429,000
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability		$ 1,900	$ 2,700	0	$ 1,850
Cash consideration paid to shareholders			$ 13,800
Business Combination, Contingent Consideration, Liability								$ 4,600
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment							11,722
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other							433
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets							432,612
Finite-Lived Intangible Assets, Gross							149,000
Goodwill	$ 530,004			$ 530,004		$ 530,004
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable							(39)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities							(3,411)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities							(3,450)
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net							429,162
Developed technology
Purchase Price Allocation [Line Items]
Finite-Lived Intangible Assets, Gross							44,000
Finite-Lived Intangible Asset, Useful Life		14 years
Customer relationships
Purchase Price Allocation [Line Items]
Finite-Lived Intangible Assets, Gross							92,000
Finite-Lived Intangible Asset, Useful Life		15 years
Leases, Acquired-in-Place, Market Adjustment [Member]
Purchase Price Allocation [Line Items]
Finite-Lived Intangible Assets, Gross							1,000
Leases, Acquired-in-Place [Member]
Purchase Price Allocation [Line Items]
Finite-Lived Intangible Asset, Useful Life		10 years
Non-compete agreements
Purchase Price Allocation [Line Items]
Finite-Lived Intangible Assets, Gross							$ 12,000
Finite-Lived Intangible Asset, Useful Life		4 years