Revenue From Contracts with Customers - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 29, 2018	Sep. 30, 2018	Sep. 29, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Retained earnings	$ 1,092,287	$ 1,070,061	$ 1,062,246
Contract assets	82,775	76,417	0
Inventories, net	$ 798,271	725,387	$ 794,346
Transferred over Time [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Percentage of Revenue	89.00%
ASU 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Retained earnings	$ 8,612
Contract assets	82,775
Inventories, net	$ (74,152)
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)