Earnings Per Common Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 30, 2013	Mar. 31, 2012	Mar. 30, 2013	Mar. 31, 2012
Earnings Per Common Share [Abstract]
Net income	$ 11,061	$ 11,157	$ 24,844	$ 26,696
Weighted average common shares outstanding	15,723,000	15,906,000	15,696,000	15,793,000
Dilutive potential common shares	205,000	200,000	191,000	176,000
Total diluted weighted average shares outstanding	15,928,000	16,106,000	15,887,000	15,969,000
Earnings Per Share, Basic	$ 0.70	$ 0.70	$ 1.58	$ 1.69
Earnings Per Share, Diluted	$ 0.69	$ 0.69	$ 1.56	$ 1.67
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	100,000	100,000	100,000	400,000