Consolidated Statements of Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 03, 2021	Jul. 04, 2020	Jul. 03, 2021	Jul. 04, 2020
Income Statement [Abstract]
Net sales	$ 814,387	$ 857,394	$ 2,525,627	$ 2,477,167
Cost of sales	740,337	774,513	2,281,298	2,253,651
Gross profit	74,050	82,881	244,329	223,516
Selling and administrative expenses	36,439	37,028	107,136	114,517
Restructuring and impairment charges	1,238	0	3,267	6,003
Operating income	36,373	45,853	133,926	102,996
Other income (expense):
Interest expense	(3,190)	(3,988)	(11,094)	(11,934)
Interest income	308	368	1,072	1,546
Miscellaneous, net	(579)	(600)	(2,922)	(2,619)
Income before income taxes	32,912	41,633	120,982	89,989
Income tax expense	5,303	5,791	15,411	10,215
Net income	$ 27,609	$ 35,842	$ 105,571	$ 79,774
Earnings per share:
Basic (in dollars per share)	$ 0.97	$ 1.23	$ 3.68	$ 2.73
Diluted (in dollars per share)	$ 0.95	$ 1.20	$ 3.60	$ 2.66
Weighted average shares outstanding:
Basic (in shares)	28,529	29,199	28,708	29,210
Diluted (in shares)	29,068	29,793	29,298	29,936
Other comprehensive income (loss):
Derivative instrument fair value adjustment	$ (1,218)	$ 3,178	$ (1,719)	$ (1,138)
Foreign currency translation adjustments	1,434	5,586	6,730	3,463
Other comprehensive income	216	8,764	5,011	2,325
Total comprehensive income	$ 27,825	$ 44,606	$ 110,582	$ 82,099