Schedule III-Real Estate and Accumulated Depreciation (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 01, 2012	Dec. 03, 2011	Nov. 27, 2010
Cost
Balance at beginning of year	$ 168,160	$ 178,995	$ 171,456
Changes during the year:
Additions to real estate assets	13,557	3,186	9,755
Reclassification to real estate held for sale	(693)	(14,015)	(1,208)
Writeoff of fully depreciated assets	(353)		(240)
Cost of sales		(6)	(768)
Balance at end of year	180,671	168,160	178,995
Reserve
Balance at beginning of year	(51,865)	(48,165)	(43,145)
Changes during the year:
Additions to reserve charged to costs and expense	(5,237)	(5,632)	(5,791)
Reclassification to real estate held for sale	5	1,932
Writeoff of fully depreciated assets	353		240
Cost of sales			531
Balance at end of year	$ (56,744)	$ (51,865)	$ (48,165)