Consolidated Statements of Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 04, 2020	Mar. 30, 2019	Apr. 04, 2020	Mar. 30, 2019
Income Statement [Abstract]
Net sales	$ 767,364	$ 789,051	$ 1,619,773	$ 1,554,595
Cost of sales	705,919	718,415	1,479,138	1,411,576
Gross profit	61,445	70,636	140,635	143,019
Selling and administrative expenses	38,233	37,462	77,489	72,894
Restructuring and impairment charges	6,003	0	6,003	0
Operating income	17,209	33,174	57,143	70,125
Other income (expense):
Interest expense	(3,814)	(3,145)	(7,946)	(5,394)
Interest income	533	440	1,178	965
Miscellaneous, net	154	(1,773)	(2,019)	(2,885)
Income before income taxes	14,082	28,696	48,356	62,811
Income tax expense	1,156	3,938	4,424	15,827
Net income	$ 12,926	$ 24,758	$ 43,932	$ 46,984
Earnings per share:
Basic (in dollars per share)	$ 0.44	$ 0.81	$ 1.50	$ 1.52
Diluted (in dollars per share)	$ 0.43	$ 0.79	$ 1.46	$ 1.48
Weighted average shares outstanding:
Basic (in shares)	29,291	30,603	29,216	31,003
Diluted (in shares)	29,925	31,385	29,999	31,836
Other comprehensive (loss) income :
Derivative instrument fair value adjustment	$ (6,539)	$ 1,984	$ (4,316)	$ 2,362
Foreign currency translation adjustments	(7,327)	515	(2,123)	(1,356)
Other comprehensive (loss) income :	(13,866)	2,499	(6,439)	1,006
Total comprehensive (loss) income	$ (940)	$ 27,257	$ 37,493	$ 47,990