XML 100 R82.htm IDEA: XBRL DOCUMENT v3.20.2
Reportable Segments, Geographic Information and Major Customers - Narrative (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Apr. 04, 2020
USD ($)
Sep. 28, 2019
USD ($)
Oct. 03, 2020
USD ($)
segment
Sep. 28, 2019
USD ($)
Sep. 29, 2018
USD ($)
Segment Reporting [Abstract]          
Restructuring and impairment charges $ 6,000 $ 1,700 $ 6,003 $ 1,678 $ 0
One-time employee bonus         13,500
Number of reportable segments | segment     3    
Other long-term assets, operating lease right-of-use assets, deferred income tax assets and intangible assets   78,400 $ 127,000 78,400  
Concentration Risk [Line Items]          
Restructuring and impairment charges $ 6,000 $ 1,700 $ 6,003 $ 1,678 $ 0
Customer Concentration Risk | General Electric Company ("GE") | Accounts Receivable          
Concentration Risk [Line Items]          
Percentage of concentration risk     15.70% 10.10%