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Revenue From Contracts with Customers - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Mar. 30, 2019
Mar. 30, 2019
Sep. 30, 2018
Sep. 29, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]        
Retained earnings $ 1,117,045 $ 1,117,045 $ 1,070,061 $ 1,062,246
Contract assets 86,803 86,803 76,417 0
Inventories, net $ 802,261 $ 802,261 725,387 $ 794,346
Transferred over Time [Member]        
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]        
Percentage of Revenue 90.00% 90.00%    
ASU 2014-09        
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]        
Retained earnings $ 9,106 $ 9,106    
Contract assets 86,803 86,803    
Inventories, net $ (78,766) $ (78,766)    
Adjustments due to the adoption of ASU 2014-09 | ASU 2014-09        
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]        
Retained earnings     7,815  
Contract assets     76,417  
Inventories, net     $ (68,959)