Consolidated Statements of Comprehensive Income - USD ($) shares in Thousands	12 Months Ended
	Sep. 30, 2017	Oct. 01, 2016	Oct. 03, 2015
Income Statement [Abstract]
Net sales	$ 2,528,052,000	$ 2,556,004,000	$ 2,654,290,000
Cost of sales	2,272,197,000	2,328,645,000	2,414,740,000
Gross profit	255,855,000	227,359,000	239,550,000
Selling and administrative expenses	125,947,000	120,886,000	122,423,000
Restructuring and other charges	0	7,034,000	1,691,000
Operating income	129,908,000	99,439,000	115,436,000
Other income (expense):
Interest expense	(13,578,000)	(14,635,000)	(13,964,000)
Interest income	5,042,000	4,242,000	3,499,000
Miscellaneous	451,000	(1,652,000)	1,324,000
Income before income taxes	121,823,000	87,394,000	106,295,000
Income tax expense	9,761,000	10,967,000	11,963,000
Net income	$ 112,062,000	$ 76,427,000	$ 94,332,000
Earnings per share:
Basic (in dollars per share)	$ 3.33	$ 2.29	$ 2.81
Diluted (in dollars per share)	$ 3.24	$ 2.24	$ 2.74
Weighted average shares outstanding:
Basic (in shares)	33,612	33,374	33,618
Diluted (in shares)	34,553	34,098	34,379
Other comprehensive income (loss):
Derivative instrument fair value adjustment	$ 2,405,000	$ 8,967,000	$ (11,223,000)
Foreign currency translation adjustments	4,155,000	(14,035,000)	(13,830,000)
Other comprehensive income (loss)	6,560,000	(5,068,000)	(25,053,000)
Total comprehensive income	$ 118,622,000	$ 71,359,000	$ 69,279,000