Real Estate Assets (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended										0 Months Ended	5 Months Ended	12 Months Ended						12 Months Ended			12 Months Ended				12 Months Ended			12 Months Ended
	Dec. 01, 2012	Dec. 03, 2011	Nov. 27, 2010	Dec. 01, 2012 Imperial's Florida farm	Dec. 03, 2011 Imperial's Florida farm	Dec. 01, 2012 Held for Sale	Dec. 03, 2011 Held for Sale	Dec. 01, 2012 Land	Jul. 06, 2012 Land	Dec. 03, 2011 Land	Jul. 06, 2012 Land Tradeport Undeveloped land sale acre	Dec. 01, 2012 Land Tradeport Undeveloped land sale	Dec. 01, 2012 Land Tradeport Undeveloped land sale	Dec. 01, 2012 Land Tradeport Undeveloped land sale Estimated total	Dec. 01, 2012 Land Held for Sale	Dec. 03, 2011 Land Held for Sale	Dec. 01, 2012 Land improvements	Dec. 03, 2011 Land improvements	Dec. 01, 2012 Land improvements Minimum	Dec. 01, 2012 Land improvements Maximum	Dec. 03, 2011 Land improvements Held for Sale	Dec. 01, 2012 Land improvements Held for Sale Minimum	Dec. 01, 2012 Land improvements Held for Sale Maximum	Dec. 01, 2012 Buildings and improvements	Dec. 03, 2011 Buildings and improvements	Dec. 01, 2012 Buildings and improvements Minimum	Dec. 01, 2012 Buildings and improvements Maximum	Dec. 03, 2011 Buildings and improvements Held for Sale	Dec. 01, 2012 Buildings and improvements Held for Sale Minimum	Dec. 01, 2012 Buildings and improvements Held for Sale Maximum	Dec. 01, 2012 Tenant improvements	Dec. 03, 2011 Tenant improvements	Dec. 01, 2012 Development costs	Dec. 03, 2011 Development costs	Dec. 01, 2012 Development costs Held for Sale	Dec. 03, 2011 Development costs Held for Sale
Real estate assets
Estimated Useful Lives																			10 years	30 years		10 years	30 years			10 years	40 years		10 years	40 years
Real estate assets, gross	$ 180,671	$ 168,160				$ 1,186	$ 14,921	$ 10,267		$ 10,435					$ 35	$ 1,911	$ 15,138	$ 14,037			$ 4			$ 125,971	$ 117,120			$ 11,855			$ 14,738	$ 14,104	$ 14,557	$ 12,464	$ 1,151	$ 1,151
Accumulated depreciation	(56,744)	(51,865)					(1,932)
Real estate assets, net	123,927	116,295		1,921	2,161	1,186	12,989
Depreciation expense	5,184	5,632	5,791
Capitalized interest	596	134
Sales
Number of acres sold											93
Proceeds from sale of undeveloped land											7,000
Proceeds from land sale deposited in escrow	6,934								6,929
Percentage of cost incurred on sale of land												67.00%	67.00%
Percentage of total revenue and pretax gain on sale have been recognized												67.00%
Revenue from sale of land													4,703
Period when sewer line construction is expected to start													6 months
Pretax gain on land sale													3,942	3,942
Deferred revenue that will be recognized as the construction of a sewer line is completed												2,297	2,297
Pretax gain from sale of land recognized													3,942
Estimated pretax gain on sale that would be recognized after incurring total costs and recognizing total revenue													$ 5,900