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Description of Business and Significant Accounting Policies - Schedule of Accumulated Other Comprehensive Loss (Details) - USD ($)
$ in Thousands
Sep. 29, 2018
Sep. 30, 2017
Accounting Policies [Abstract]    
Foreign currency translation adjustments $ (10,540) $ (7,482)
Cumulative change in fair value of derivative instruments (1,439) 2,503
Accumulated other comprehensive loss $ (11,979) $ (4,979)