Revenue (Significant Changes in Contact Assets and Liabilities) (Details) $ in Thousands	9 Months Ended
Jun. 29, 2019 USD ($)
Change in Contract with Customer, Asset [Abstract]
Balance, September 29, 2018	$ 70,474
Cumulative transition adjustment upon adoption	(8,002)
Changes in estimated stage of completion	92,958
Transfers to accounts receivable, net	(88,506)
Acquisitions	1,518
Other	362
Balance, June 29, 2019	68,804
Change in Contract with Customer, Liability [Abstract]
Balance, September 29, 2018	80,131
Cumulative transition adjustment upon adoption	20,557
Revenue recognized included in balance at beginning of period	(70,294)
Increases due to payments received, excluding amounts recognized as revenue during period	64,248
Acquisitions	4,853
Other	(820)
Balance, June 29, 2019	$ 98,675

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Amount of increase (decrease) in Contract with Customer, Liability, due to payments received, excluding amounts recognized as revenue during the period

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Amount of increase (decrease) in revenue recognized for cumulative catch-up adjustment from change in measure of progress which increases (decreases) right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.

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