Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands, shares in Millions	Total	Common Stock	Capital in Excess of Par value of Common Stock	Retained Earnings	Accumulated Other Comprehensive Income
Balance (in shares) at Sep. 29, 2013		93.8
Balance at Sep. 29, 2013	$ 1,032,100	$ 18,800	$ 737,800	$ 275,500	$ 0
Proceeds from exercise of stock options (in shares)		1.5
Proceeds from exercise of stock options	19,200	$ 200	19,000
Tax withholding on restricted stock units	(1,500)		(1,500)
Grants and cancellations of restricted share awards (in shares)		0.3
Grants and cancellations of restricted share awards	0	$ 100	(100)
Issuance of stock awards related to acquisition	3,800		3,714
Stock-based compensation expense	43,900
Stock-based compensation	43,900
Other comprehensive income, net of tax	(1,200)				(1,200)
Net income	23,100			23,100
Balance (in shares) at Sep. 28, 2014		95.6
Balance at Sep. 28, 2014	1,115,600	$ 19,100	799,100	298,600	(1,200)
Proceeds from exercise of stock options (in shares)		2.1
Proceeds from exercise of stock options	48,400	$ 400	48,000
Tax withholding on restricted stock units	(18,100)		(18,100)
Grants and cancellations of restricted share awards (in shares)		0.1
Grants and cancellations of restricted share awards	0	$ 0	0
Stock-based compensation expense	49,800
Stock-based compensation	49,800
Other comprehensive income, net of tax	(1,900)				(1,900)
Repurchase of outstanding common stock (in shares)		(2.7)
Repurchase of outstanding common stock	(75,000)	$ (500)	(74,500)
Net income	84,600			84,600
Balance (in shares) at Sep. 27, 2015		95.1
Balance at Sep. 27, 2015	1,207,200	$ 19,000	808,100	383,200	(3,100)
Stock Issued During Period, Shares, Share-based Compensation, Gross		0.8
Stock Issued During Period, Value, Share-based Compensation, Gross		$ 100
Proceeds from exercise of stock options (in shares)		2.2
Proceeds from exercise of stock options	4,600	$ 400	4,200
Shares Paid for Tax Withholding for Share Based Compensation		1.2
Tax withholding on restricted stock units	(42,500)	$ (200)	(42,300)
Grants and cancellations of restricted share awards (in shares)		0.8
Grants and cancellations of restricted share awards	0	$ 200	(200)
Stock Issued During Period, Shares, Acquisitions		15.8
Issuance of stock awards related to acquisition	474,500	$ 3,200	471,300
Issuance of stock awards related to acquisition (in shares)		0.1
Issuance of stock awards related to acquisition	15,700	$ 0	15,700
Stock-based compensation expense	101,100		101,000
Stock-based compensation	101,100
Other comprehensive income, net of tax	900				900
Net income	(32,600)			(32,600)
Balance (in shares) at Oct. 02, 2016		113.6
Balance at Oct. 02, 2016	$ 1,728,900	$ 22,700	$ 1,357,800	$ 350,600	$ (2,200)