Property and Equipment (Narrative) (Details) (USD $)	1 Months Ended
	Jun. 30, 2003 building	Nov. 30, 2012	Nov. 30, 2011
Property, Plant and Equipment [Line Items]
Number of buildings purchased	4
Term of lease period	51 years
Lease paid in advance	$ 28,000,000
Total lease consideration paid	108,000,000
Cash paid for land lease and buildings	54,000,000
Mortgage note payable for lease	54,000,000
Buildings purchase price		$ 77,938,000	$ 77,938,000
Buildings
Property, Plant and Equipment [Line Items]
Estimated useful life	25 years