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Commitments and Contingencies (Future Minimum Rental Commitments) (Details)
$ in Thousands
Sep. 26, 2017
USD ($)
Commitments and Contingencies Disclosure [Abstract]  
2018 $ 5,763
2019 5,543
2020 4,944
2021 4,481
2022 4,355
Thereafter 17,291
Total 42,377
Less sublease rentals (1,147)
Operating Leases Future Minimum Payments Due, Net $ 41,230