Consolidated Statements Of Shareholder's Equity And Comprehensive Income - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Common Stock, Shares, Outstanding at Period Start at Sep. 29, 2012		35,097,000
Stockholders' Equity at Period Start at Sep. 29, 2012	$ 649,022	$ 489	$ 435,546	$ (400,110)	$ 596,913	$ 16,184
Comprehensive income:
Net Income (Loss) Attributable to Parent	82,259				82,259
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	6,754
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	4,053
Treasury shares purchased, value	(49,858)			(49,858)
Treasury shares purchased, shares		(1,822,000)
Stock-based compensation expense	11,782		11,782
Exercise of stock options, including tax benefits, shares		325,000
Exercise of stock options, including tax benefits, value	2,043	$ 3	2,040
Common Stock, Shares, Outstanding at Period End at Sep. 28, 2013		33,600,000
Stockholders' Equity at Period End at Sep. 28, 2013	699,301	$ 492	449,368	(449,968)	679,172	20,237
Comprehensive income:
Net Income (Loss) Attributable to Parent	87,213				87,213
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	(3,220)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(1,655)
Treasury shares purchased, value	(30,000)			(30,000)
Treasury shares purchased, shares		(733,000)
Stock-based compensation expense	12,970		12,970
Exercise of stock options, including tax benefits, shares		786,000
Exercise of stock options, including tax benefits, value	$ 13,304	$ 8	13,296
Common Stock, Shares, Outstanding at Period End at Sep. 27, 2014	33,653,000	33,653,000
Stockholders' Equity at Period End at Sep. 27, 2014	$ 781,133	$ 500	475,634	(479,968)	766,385	18,582
Comprehensive income:
Net Income (Loss) Attributable to Parent	94,332				94,332
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	(13,830)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(25,053)
Treasury shares purchased, value	(30,000)	$ 0	0	(30,000)	0	0
Treasury shares purchased, shares		(745,000)
Stock-based compensation expense	13,252	$ 0		0	0	0
Exercise of stock options, including tax benefits, shares		592,000
Exercise of stock options, including tax benefits, value	$ 8,608	$ 6	8,602	0	0	0
Common Stock, Shares, Outstanding at Period End at Oct. 03, 2015	33,500,000	33,500,000
Stockholders' Equity at Period End at Oct. 03, 2015	$ 842,272	$ 506	$ 497,488	$ (509,968)	$ 860,717	$ (6,471)