Commitments and Contingencies (Details Numeric) (USD $)	1 Months Ended		3 Months Ended
	Jun. 30, 2010	Oct. 31, 2009 companies	Mar. 02, 2012 buildings	Dec. 02, 2011		Mar. 02, 2012 East and West Towers [Member]	Jun. 30, 2009 East and West Towers [Member]	Mar. 02, 2012 Almaden Tower [Member]
Property Subject to or Available for Operating Lease [Line Items]
Number of Corporate Headquarter Office Buildings			3
Standby letter of credit							$ 16,500,000
Lease Receivable Purchased			207,239,000	207,239,000	[1]	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
Sale-leaseback agreement classified as a capital lease	$ 32,200,000		$ 17,400,000
Sale-leaseback agreement period	43 months
Loss Contingency, Number of Parties Jointly and Severally Liable in Litigation		23

[1] The Condensed Consolidated Balance Sheet as of December 2, 2011 has been derived from the audited consolidated financial statements at that date but does not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements.