BUSINESS SEGMENT - Revenue and Gross Profit by Segment (Details) $ in Thousands		3 Months Ended		6 Months Ended
		Mar. 29, 2025 USD ($)	Mar. 30, 2024 USD ($)	Mar. 29, 2025 USD ($)	Mar. 30, 2024 USD ($)
Segment Reporting Information [Line Items]
Net sales		$ 1,984,080	$ 1,834,595	$ 3,990,428	$ 3,709,393
Gross profit		176,235	154,757	$ 344,150	315,597
Number of Reportable Segments				1
Operating Segments
Segment Reporting Information [Line Items]
Gross profit		181,325	163,125	$ 361,417	328,015
Operating Segments | IMS
Segment Reporting Information [Line Items]
Net sales		1,603,511	1,461,189	3,226,948	2,966,710
Gross profit		124,007	111,950	251,972	225,750
Operating Segments | CPS
Segment Reporting Information [Line Items]
Net sales		411,068	398,067	826,753	792,338
Gross profit		57,318	51,175	109,445	102,265
Intersegment revenue
Segment Reporting Information [Line Items]
Net sales		(30,499)	(24,661)	(63,273)	(49,655)
Unallocated items
Segment Reporting Information [Line Items]
Gross profit	[1]	$ (5,090)	$ (8,368)	$ (17,267)	$ (12,418)

[1] For purposes of evaluating segment performance, management excludes certain items from its measures of gross profit. These items consist of stock-based compensation expense, litigation settlements and charges resulting from distressed customers.