Acquisitions (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Mar. 31, 2018	Jun. 30, 2018	Jun. 24, 2017	Jun. 25, 2016
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired	$ 57,773	$ 57,773	$ 0	$ 0
Business Combination, Contingent Consideration, Liability	16,000
Goodwill acquired		$ 532,251	$ 491,015	$ 490,648
Intellectual property [Member]
Business Acquisition [Line Items]
Amortizable intangible assets acquired	26,000
In Process Research and Development [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	10,500
Icron [Domain]
Business Acquisition [Line Items]
Goodwill acquired	$ 41,889