Earnings Per Share (Schedule Of Reconciliation Of Amounts Utilized In Computation Of Basic And Diluted Earnings Per Share) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2012	Apr. 02, 2011	Mar. 31, 2012	Apr. 02, 2011
Earnings Per Share [Line Items]
Net income	$ 19,958	$ 23,860	$ 37,828	$ 48,893
Basic weighted average common shares outstanding	34,874,000	39,927,000	34,737,000	40,197,000
Dilutive effect of share-based awards outstanding	784,000	732,000	694,000	737,000
Diluted weighted average shares outstanding	35,658,000	40,659,000	35,431,000	40,934,000
Earnings per share, Basic	$ 0.57	$ 0.60	$ 1.09	$ 1.22
Earnings per share, Diluted	$ 0.56	$ 0.59	$ 1.07	$ 1.19
Stock Options And Stock-Settled Stock Appreciation Rights (SARs) [Member]
Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of diluted earnings per share	1,000,000	1,300,000	1,200,000	1,200,000
Restricted Stock Units (RSUs) [Member]
Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of diluted earnings per share	22,000		94,000