Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2018	Apr. 01, 2017	Mar. 31, 2018	Apr. 01, 2017
Net sales	$ 1,675,629	$ 1,682,262	$ 3,420,429	$ 3,402,239
Cost of sales	1,560,931	1,549,052	3,196,265	3,136,867
Gross profit	114,698	133,210	224,164	265,372
Operating expenses:
Selling, general and administrative	65,384	62,388	128,987	127,528
Research and development	8,221	8,437	15,836	16,608
Restructuring Expense (Recovery), net	(8,591)	3,301	14,951	4,029
Other Operating Expense (Recovery), Net	910	918	1,828	385
Total operating expenses	65,924	75,044	161,602	148,550
Operating income	48,774	58,166	62,562	116,822
Interest income	287	238	572	439
Interest expense	(6,826)	(5,486)	(13,040)	(10,753)
Other income (expense), net	(483)	3,812	2,747	5,069
Interest and other, net	(7,022)	(1,436)	(9,721)	(5,245)
Income before income taxes	41,752	56,730	52,841	111,577
Provision for income taxes	17,120	25,013	183,119	34,996
Net income (loss)	$ 24,632	$ 31,717	$ (130,278)	$ 76,581
Net income (loss) per share:
Basic	$ 0.35	$ 0.42	$ (1.83)	$ 1.03
Diluted	$ 0.33	$ 0.41	$ (1.83)	$ 0.99
Weighted average shares used in computing per share amounts:
Basic	70,441	74,761	71,096	74,156
Diluted	73,582	77,864	71,096	77,531