Impairment, Disposition Of Property And Equipment, And Restaurant Closing Costs (Restaurant Closing Costs) (Details) (USD $) In Thousands, unless otherwise specified	4 Months Ended
	Jan. 22, 2012	Jan. 23, 2011
Impairment, Disposition Of Property And Equipment, And Restaurant Closing Costs [Abstract]
Balance at beginning of year	$ 21,657	$ 25,020
Additions and adjustments	1,246	805
Cash payments	(1,675)	(1,887)
Balance at end of quarter	$ 21,228	$ 23,938