Income Taxes (Details)	9 Months Ended
	Aug. 31, 2011
United States [Member]
Tax years that under examination in the major tax jurisdictions
Tax Year	2006
United Kingdom [Member]
Tax years that under examination in the major tax jurisdictions
Tax Year	2008
New Jersey [Member]
Tax years that under examination in the major tax jurisdictions
Tax Year	2006
New York State [Member]
Tax years that under examination in the major tax jurisdictions
Tax Year	2001
New York City [Member]
Tax years that under examination in the major tax jurisdictions
Tax Year	2003