Consolidated Statements of Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Sep. 29, 2018
Income Statement [Abstract]
Net sales	$ 3,390,394	$ 3,164,434	$ 2,873,508
Cost of sales	3,077,688	2,872,596	2,615,908
Gross profit	312,706	291,838	257,600
Selling and administrative expenses	153,331	148,105	139,317
Restructuring and impairment charges	6,003	1,678	0
Operating income	153,372	142,055	118,283
Other income (expense):
Interest expense	(16,162)	(12,853)	(12,226)
Interest income	1,878	1,949	4,696
Miscellaneous, net	(3,691)	(5,196)	(3,143)
Income before income taxes	135,397	125,955	107,610
Income tax expense	17,918	17,339	94,570
Net income	$ 117,479	$ 108,616	$ 13,040
Earnings per share:
Basic (in dollars per share)	$ 4.02	$ 3.59	$ 0.40
Diluted (in dollars per share)	$ 3.93	$ 3.50	$ 0.38
Weighted average shares outstanding:
Basic (in shares)	29,195	30,271	33,003
Diluted (in shares)	29,916	31,074	33,919
Other comprehensive income (loss):
Derivative instrument fair value adjustment	$ 1,831	$ 1,050	$ (3,942)
Foreign currency translation adjustments	10,894	(6,855)	(3,058)
Other comprehensive income (loss)	12,725	(5,805)	(7,000)
Total comprehensive income	$ 130,204	$ 102,811	$ 6,040