Unaudited Quarterly Results Of Operations (Quarterly Results Of Operations) (Details) (USD $)	3 Months Ended						4 Months Ended		12 Months Ended
	Sep. 28, 2014	Jul. 06, 2014	Apr. 13, 2014	Sep. 29, 2013	Jul. 07, 2013	Apr. 14, 2013	Jan. 19, 2014	Jan. 20, 2013	Sep. 28, 2014	Sep. 29, 2013	Sep. 30, 2012
Selected Quarterly Financial Information [Abstract]
Prior Period Reclassification Adjustment	$ 2,100,000
Revenues	344,687,000	348,492,000	340,870,000	337,981,000	350,329,000	347,222,000	450,081,000	454,335,000	1,484,131,000	1,489,867,000	1,509,295,000
Earnings from operations	29,225,000	43,000,000	32,879,000	36,699,000	30,884,000	27,447,000	57,204,000	43,175,000	162,308,000	138,205,000	120,816,000
Net Income (Loss) Attributable to Parent	$ 16,160,000	$ 24,703,000	$ 15,801,000	$ 22,828,000	$ (5,656,000)	$ 13,291,000	$ 32,286,000	$ 20,689,000	$ 88,950,000	$ 51,152,000	$ 57,651,000
Net earnings per share, Basic (usd per share)	$ 0.41	$ 0.62	$ 0.38	$ 0.53	$ (0.13)	$ 0.30	$ 0.76	$ 0.48	$ 2.18	$ 1.18	$ 1.31
Net earnings per share, Diluted (usd per share)	$ 0.40	$ 0.61	$ 0.37	$ 0.51	$ (0.12)	$ 0.29	$ 0.74	$ 0.47	$ 2.12	$ 1.14	$ 1.28