Consolidated Statements Of Stockholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock [Member]	Capital In Excess Of Par Value [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss, Net [Member]	Treasury Stock [Member]
Balance at Sep. 27, 2009	$ 524,489	$ 740	$ 169,440	$ 912,210	$ (83,442)	$ (474,459)
Balance, shares at Sep. 27, 2009		73,987,070
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued under stock plans, including tax benefit	7,504	5	7,499
Shares issued under stock plans, including tax benefit, shares		474,562
Share-based compensation	10,605		10,605
Purchases of treasury stock	(97,000)					(97,000)
Comprehensive income:
Net earnings	70,210			70,210
Unrealized gains (losses) on interest rate swaps, net	2,401				2,401
Effect of actuarial losses and prior service cost, net	2,254				2,254
Total comprehensive income	74,865			70,210	4,655
Balance at Oct. 03, 2010	520,463	745	187,544	982,420	(78,787)	(571,459)
Balance, shares at Oct. 03, 2010		74,461,632
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued under stock plans, including tax benefit	7,083	5	7,078
Shares issued under stock plans, including tax benefit, shares		530,855
Share-based compensation	8,062		8,062
Purchases of treasury stock	(193,099)					(193,099)
Comprehensive income:
Net earnings	80,600			80,600
Unrealized gains (losses) on interest rate swaps, net	(1,199)				(1,199)
Effect of actuarial losses and prior service cost, net	(15,954)				(15,954)
Total comprehensive income	63,447			80,600	(17,153)
Balance at Oct. 02, 2011	405,956	750	202,684	1,063,020	(95,940)	(764,558)
Balance, shares at Oct. 02, 2011		74,992,487
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued under stock plans, including tax benefit	11,541	8	11,533
Shares issued under stock plans, including tax benefit, shares		835,407
Share-based compensation	6,883		6,883
Purchases of treasury stock	(30,013)					(30,013)
Comprehensive income:
Net earnings	57,651			57,651
Unrealized gains (losses) on interest rate swaps, net	152				152
Effect of actuarial losses and prior service cost, net	(40,225)				(40,225)
Total comprehensive income	17,578			57,651	(40,073)
Balance at Sep. 30, 2012	$ 411,945	$ 758	$ 221,100	$ 1,120,671	$ (136,013)	$ (794,571)
Balance, shares at Sep. 30, 2012		75,827,894