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Chief Executive Officer Succession Plan (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 25, 2018
Sep. 26, 2017
Jun. 30, 2018
Sep. 30, 2017
Dec. 31, 2018
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Shares issued in the period (in shares)           685 195 416
Fair value (USD per share)           $ 26.13 $ 33.68 $ 24.54
Stock-based compensation expense           $ 11,177 $ 9,658 $ 12,688
CEO                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Cash separation payment           1,453    
Continuation costs $ 209              
Stock-based compensation expense           (2,244)    
Reduction to stock-based compensation expense           2,222    
Additional stock-based compensation expense           19    
CEO | Forecast                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Cash separation payment         $ 34,294      
Additional stock-based compensation expense         445      
CEO | TSR                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Shares issued in the period (in shares)   164 164 164        
Fair value (USD per share) $ 3.19 $ 31.60 $ 3.19 $ 31.60        
Stock-based compensation expense           $ 22    
CEO | TSR | Forecast                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Expense from grant         $ 524