Commitments and Contingencies (Details Numeric) (USD $)	12 Months Ended
	Nov. 30, 2012 buildings	Dec. 02, 2011	Dec. 03, 2010	Nov. 30, 2012 East and West Towers [Member]	Aug. 28, 2009 East and West Towers [Member]	Mar. 31, 2007 East and West Towers [Member]	Nov. 30, 2012 Almaden Tower [Member]	Mar. 31, 2007 Almaden Tower [Member]
Property Subject to or Available for Operating Lease [Line Items]
Number of Corporate Headquarter Office Buildings	3
Standby letter of credit					$ 16,600,000
Lease Receivable Purchased	207,239,000	207,239,000		126,800,000			80,400,000
Option to Purchase Buildings				143,200,000			103,600,000
Residual Value Guarantees				126,800,000			89,400,000
Residual Value Guarantees, recorded						5,200,000		3,000,000
Royalty Expense	$ 29,600,000	$ 29,800,000	$ 34,100,000