Summary of Significant Accounting Policies (Details Textual) (USD $)	12 Months Ended
	Nov. 30, 2011 Year	Nov. 30, 2010	Nov. 30, 2009
Summary of Significant Accounting Policies (Textual) [Abstract]
Letter of Credit Facility, collateral amount	$ 64,500,000	$ 88,700,000
Summary of Significant Accounting Policies (Additional Textual) [Abstract]
Cash equivalents	212,800,000	797,200,000
Restricted cash	64,481,000	115,477,000
Estimated useful life for depreciation, Property and Equipment, minimum	2
Estimated useful life for depreciation, Property and Equipment, maximum	10
Estimated useful life for depreciation, Operating properties	39
Property and Equipment, Total	7,800,000	9,600,000
Accumulated depreciation	18,000,000	27,100,000
Total Depreciation expense	2,031,000	3,289,000	5,235,000
Advertising Cost Incurred	32,400,000	25,900,000	16,500,000
Company expensed legal fees	16,900,000	33,700,000	25,700,000
Line of Credit [Member]
Summary of Significant Accounting Policies (Textual) [Abstract]
Letter of Credit Facility, collateral amount		88,700,000
Surety Bond [Member]
Summary of Significant Accounting Policies (Textual) [Abstract]
Cash collateral for the surety bonds		$ 26,800,000