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Commitments and Contingencies (Details)
£ in Millions
 3 Months Ended 6 Months Ended
Dec. 30, 2017
USD ($)
Dec. 31, 2016
USD ($)
Dec. 30, 2017
USD ($)
Dec. 31, 2016
USD ($)
Jul. 01, 2017
USD ($)
Jul. 02, 2016
GBP (£)
Loss Contingencies [Line Items]            
Guarantee liabilities $ 0   $ 0   $ 0  
Standby letters of credit 11,500,000   $ 11,500,000      
Product Warranties            
Warranty Term for most products     3 years      
Changes in warranty reserve            
Balance as of beginning of period 6,400,000 $ 5,200,000 $ 5,800,000 $ 4,900,000    
Provision for warranty 1,700,000 1,600,000 2,200,000 3,200,000    
Utilization of reserve (2,600,000) (900,000) (3,500,000) (2,000,000)    
Adjustments related to pre-existing warranties (including changes in estimates) 1,300,000 (600,000) 2,000,000 (800,000)    
Acquisition of Trilithic 0 0 300,000 0    
Balance as of end of period 6,800,000 $ 5,300,000 6,800,000 $ 5,300,000    
Performance bond            
Loss Contingencies [Line Items]            
Guarantee liabilities 1,800,000   1,800,000      
Judicial ruling | Case related to amendment of pension for foreign subsidiary            
Loss Contingencies [Line Items]            
Loss contingency accrual $ 7,700,000   $ 7,700,000     £ 5.7