Revenue Recognition - Summary of Contract Assets and Liabilities (Details) - USD ($) $ in Thousands	9 Months Ended
	Jun. 28, 2019	Sep. 28, 2018
Revenue from Contract with Customer [Abstract]
Accounts Receivable, Net, Current	$ 231,185	$ 166,133
Contract assets	182,912	165,959
Other non-current assets	100,550	80,080
Contract liabilities	19,435	17,468
Non-current contract liabilities	24,428	25,887
Other non-current liabilities	186,765	$ 183,799
Change ($)
Accounts receivable, net	65,052
Contract assets	16,953
Other non-current assets	20,470
Contract liabilities - current	1,967
Contract liabilities - non-current	(1,459)
Other non-current liabilities	$ 2,966
Change (%)
Accounts receivable, net	39.00%
Contract assets	10.00%
Other non-current assets	26.00%
Contract liabilities - current	11.00%
Contract liabilities - non-current	(6.00%)
Other non-current liabilities	2.00%