Condensed Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 28, 2015	Mar. 29, 2014	Mar. 28, 2015	Mar. 29, 2014
Net sales	$ 1,527,530	$ 1,476,712	$ 3,198,692	$ 2,924,210
Cost of sales	1,412,267	1,357,745	2,957,083	2,694,458
Gross profit	115,263	118,967	241,609	229,752
Operating expenses:
Selling, general and administrative	57,023	62,332	116,441	121,514
Research and development	7,559	8,829	15,628	16,734
Restructuring costs	1,740	2,565	4,740	6,269
Amortization of intangible assets	425	474	850	948
Asset impairments	0	0	1,954	0
Gain on sales of long-lived assets	(1,136)	(530)	(1,136)	(530)
Total operating expenses	65,611	73,670	138,477	144,935
Operating income	49,652	45,297	103,132	84,817
Interest income	265	174	554	980
Interest expense	(6,197)	(7,482)	(12,634)	(14,955)
Other income (expense), net	(365)	626	(1,893)	1,504
Interest and other, net	(6,297)	(6,682)	(13,973)	(12,471)
Income before income taxes	43,355	38,615	89,159	72,346
Provision for income taxes	28,607	17,775	51,755	28,405
Net income	$ 14,748	$ 20,840	$ 37,404	$ 43,941
Net income per share:
Basic	$ 0.18	$ 0.25	$ 0.45	$ 0.53
Diluted	$ 0.17	$ 0.24	$ 0.43	$ 0.51
Weighted average shares used in computing per share amounts:
Basic	82,977	82,728	82,762	83,247
Diluted	86,897	86,144	86,797	86,723