Commitments and Contingencies (Details) £ in Millions	3 Months Ended
	Sep. 30, 2017 USD ($)	Oct. 01, 2016 USD ($)	Jul. 01, 2017 USD ($)	Jul. 02, 2016 USD ($)	Jul. 02, 2016 GBP (£)
Loss Contingencies [Line Items]
Guarantee liabilities	$ 0		$ 0
Standby letters of credit	$ 11,600,000
Product Warranties
Warranty Term for most products	3 years
Changes in warranty reserve
Balance as of beginning of period	$ 5,800,000	$ 4,900,000
Provision for warranty	500,000	1,600,000
Utilization of reserve	(900,000)	(1,100,000)
Adjustments related to pre-existing warranties (including changes in estimates)	700,000	(200,000)
Acquisition of Trilithic	300,000	0
Balance as of end of period	6,400,000	$ 5,200,000
Performance bond
Loss Contingencies [Line Items]
Guarantee liabilities	$ 2,100,000
Judicial ruling | Case related to amendment of pension for foreign subsidiary
Loss Contingencies [Line Items]
Loss contingency accrual				$ 7,600,000	£ 5.7