Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Oct. 02, 2021	Oct. 03, 2020	Sep. 28, 2019
CASH FLOWS PROVIDED BY (USED IN) OPERATING ACTIVITIES:
Net income	$ 268,998	$ 139,713	$ 141,515
Adjustments to reconcile net income (loss) to cash provided by operating activities:
Depreciation and amortization	109,656	114,218	116,949
Stock-based compensation expense	34,976	26,235	30,844
Deferred income taxes	33,724	13,567	54,668
Impairment of goodwill and other assets	0	8,409	0
Gain on Sale of Intellectual Property	(15,000)	0	0
Gain on liquidation of foreign entity	(8,263)	0	0
Other, net	(1,371)	(239)	2,219
Changes in operating assets and liabilities:
Accounts receivable	(146,516)	83,623	54,947
Contract assets	47,842	(283)	(20,814)
Inventories	(167,186)	39,564	121,383
Prepaid expenses and other assets	(6,486)	17,798	10,018
Accounts payable	236,270	(106,640)	(182,521)
Accrued liabilities	(48,302)	(35,410)	53,757
Cash provided by operating activities	338,342	300,555	382,965
CASH FLOWS PROVIDED BY (USED IN) INVESTING ACTIVITIES:
Purchases of property, plant and equipment, net of proceeds from asset sales	(73,296)	(65,982)	(134,674)
Proceeds from sales of property, plant and equipment	1,084	1,573	7,532
Purchases of investments	(2,705)	(30,000)	(499)
Sale of investments	0	30,000	0
Cash paid for business acquisition, net of cash acquired	(21,408)	0	0
Proceeds from sale of intellectual property	5,000	0	0
Cash used in investing activities	(91,325)	(64,409)	(127,641)
CASH FLOWS PROVIDED BY (USED IN) FINANCING ACTIVITIES:
Proceeds from revolving credit facility borrowings	399,600	1,909,000	3,884,325
Repayments of revolving credit facility borrowings	(399,600)	(1,909,000)	(4,099,325)
Repayments of long-term debt	(18,752)	(39,048)	(378,416)
Proceeds from long-term debt	0	0	375,000
Debt issuance costs	0	0	(2,727)
Net proceeds from stock issuances	2,993	7,793	13,539
Repurchases of common stock	(64,059)	(179,025)	(12,614)
Proceeds from collection of notes receivable	2,500	0	0
Cash used in financing activities	(77,318)	(210,280)	(220,218)
Effect of exchange rate changes	(199)	(81)	107
Increase in cash and cash equivalents	169,500	25,785	35,213
Cash and cash equivalents at beginning of year	480,526	454,741	419,528
Cash and cash equivalents at end of year	650,026	480,526	454,741
Cash paid during the year:
Interest, net of capitalized interest	15,264	20,477	30,143
Income taxes, net of refunds	33,358	30,700	32,132
Noncash Investing and Financing Items:
Unpaid purchases of property, plant and equipment at end of period	$ 20,929	$ 12,371	$ 27,279