Consolidated Statements of Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 03, 2021	Apr. 04, 2020	Apr. 03, 2021	Apr. 04, 2020
Income Statement [Abstract]
Net sales	$ 880,885	$ 767,364	$ 1,711,240	$ 1,619,773
Cost of sales	789,883	705,919	1,540,961	1,479,138
Gross profit	91,002	61,445	170,279	140,635
Selling and administrative expenses	38,286	38,233	70,697	77,489
Restructuring and impairment charges	2,029	6,003	2,029	6,003
Operating income	50,687	17,209	97,553	57,143
Other income (expense):
Interest expense	(3,818)	(3,814)	(7,904)	(7,946)
Interest income	390	533	764	1,178
Miscellaneous, net	(825)	154	(2,343)	(2,019)
Income before income taxes	46,434	14,082	88,070	48,356
Income tax expense	4,671	1,156	10,108	4,424
Net income	$ 41,763	$ 12,926	$ 77,962	$ 43,932
Earnings per share:
Basic (in dollars per share)	$ 1.45	$ 0.44	$ 2.71	$ 1.50
Diluted (in dollars per share)	$ 1.42	$ 0.43	$ 2.65	$ 1.46
Weighted average shares outstanding:
Basic (in shares)	28,736	29,291	28,799	29,216
Diluted (in shares)	29,310	29,925	29,409	29,999
Other comprehensive (loss) income:
Derivative instrument fair value adjustment	$ (4,556)	$ (6,539)	$ (501)	$ (4,316)
Foreign currency translation adjustments	(3,404)	(7,327)	5,296	(2,123)
Other comprehensive (loss) income	(7,960)	(13,866)	4,795	(6,439)
Total comprehensive income (loss)	$ 33,803	$ (940)	$ 82,757	$ 37,493