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]
Net Income	$ 87,213	$ 0	$ 0	$ 0	$ 87,213	$ 0
Common Stock, Shares, Outstanding at Period Start at Sep. 28, 2013		33,600,000
Stockholders' Equity at Period Start at Sep. 28, 2013	699,301	$ 492	449,368	(449,968)	679,172	20,237
Comprehensive income:
Other Comprehensive Income (Loss), Net of Tax	(1,655)	$ 0	0	0	0
Treasury shares purchased, shares		(733,000)
Treasury shares purchased, value	(30,000)	$ 0	0	(30,000)	0	0
Stock-based compensation expense	12,970	$ 0	12,970	0	0	0
Exercised, Number of Options/SARs		786,000
Exercise of stock options, including tax benefits, value	13,304	$ 8	13,296	0	0	0
Common Stock, Shares, Outstanding at Period End at Sep. 27, 2014		33,653,000
Stockholders' Equity at Period End at Sep. 27, 2014	781,133	$ 500	475,634	(479,968)	766,385	18,582
Net Income	94,332	0	0	0	94,332	0
Comprehensive income:
Other Comprehensive Income (Loss), Net of Tax	(25,053)	$ 0	0	0	0
Treasury shares purchased, shares		(745,000)
Treasury shares purchased, value	(30,000)	$ 0	0	(30,000)	0	0
Stock-based compensation expense	13,252	$ 0	13,252	0	0	0
Exercised, Number of Options/SARs		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)
Net Income	76,427	0	0	0	76,427	0
Comprehensive income:
Other Comprehensive Income (Loss), Net of Tax	(5,068)	$ 0	0	0	0
Treasury shares purchased, shares		(761,000)
Treasury shares purchased, value	(30,000)	$ 0	0	(30,000)	0	0
Stock-based compensation expense	19,341	$ 0		0	0	0
Exercised, Number of Options/SARs		718,000
Exercise of stock options, including tax benefits, value	$ 13,825	$ 7	13,818	0	0	0
Common Stock, Shares, Outstanding at Period End at Oct. 01, 2016	33,457,000	33,457,000
Stockholders' Equity at Period End at Oct. 01, 2016	$ 916,797	$ 513	$ 530,647	$ (539,968)	$ 937,144	$ (11,539)