Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Apr. 03, 2021	Mar. 28, 2020
CASH FLOWS PROVIDED BY (USED IN) OPERATING ACTIVITIES:
Net income	$ 95,058	$ 43,227
Adjustments to reconcile net income to cash provided by (used in) operating activities:
Depreciation and amortization	54,831	56,777
Stock-based compensation expense	17,432	14,689
Deferred income taxes	13,641	1,952
Goodwill and other asset impairments	0	8,409
Other, net	(19)	568
Changes in operating assets and liabilities:
Accounts receivable	(79,166)	207,994
Contract assets	61,626	(10,984)
Inventories	75,303	15,333
Prepaid expenses and other assets	1,359	11,687
Accounts payable	(99,525)	(185,175)
Accrued liabilities	2,360	(7,578)
Cash provided by operating activities	142,900	156,899
CASH FLOWS PROVIDED BY (USED IN) INVESTING ACTIVITIES:
Purchases of property, plant and equipment, net of proceeds	(25,540)	(44,456)
Cash used in investing activities	(25,540)	(44,456)
CASH FLOWS PROVIDED BY (USED IN) FINANCING ACTIVITIES:
Repayment of Long-term Debt, Long-term Lease Obligation, and Capital Security	(9,376)	(24,986)
Proceeds from revolving credit facility borrowings	399,600	1,909,000
Repayments of revolving credit facility borrowings	(399,600)	(1,259,000)
Net proceeds from stock issuances	2,073	5,172
Repurchases of common stock	(15,047)	(82,033)
Cash provided by (used in) financing activities	(22,350)	548,153
Effect of exchange rate changes	(360)	(752)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	94,650	659,844
Cash and cash equivalents at beginning of period	480,526	454,741
Cash and cash equivalents at end of period	575,176	1,114,585
Cash paid during the period for:
Interest, net of capitalized interest	3,082	8,407
Income taxes, net of refunds	18,675	13,371
Unpaid purchases of property, plant and equipment at the end of period	$ 10,693	$ 9,377