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 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 in connection with director retirements		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
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	152				152
Effect of actuarial losses and prior service cost, net	(40,225)				(40,225)
Total comprehensive income	17,578
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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued under stock plans, including tax benefit	64,299	27	64,272
Shares issued in connection with director retirements		2,687,277
Share-based compensation	11,392		11,392
Purchases of treasury stock	(140,121)					(140,121)
Comprehensive income:
Net earnings	51,152			51,152
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	4				4
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	767				767
Effect of actuarial losses and prior service cost, net	72,580				72,580
Total comprehensive income	124,503
Balance at Sep. 29, 2013	472,018	785	296,764	1,171,823	(62,662)	(934,692)
Balance, shares at Sep. 29, 2013		78,515,171
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued under stock plans, including tax benefit	49,621	16	49,605
Shares issued in connection with director retirements		1,612,216
Share-based compensation	10,358		10,358
Dividends	(15,876)
Purchases of treasury stock	(319,690)
Comprehensive income:
Net earnings	88,950			88,950
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	7				7
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	(370)				(370)
Effect of actuarial losses and prior service cost, net	(27,107)				(27,107)
Total comprehensive income	61,480
Balance at Sep. 28, 2014	$ 257,911	$ 801	$ 356,727	$ 1,244,897	$ (90,132)	$ (1,254,382)
Balance, shares at Sep. 28, 2014		80,127,387