Income Taxes (Details)	3 Months Ended
	Feb. 29, 2012
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	2010
California [Member]
Tax years that under examination in the major tax jurisdictions
Tax Year	2004
Connecticut [Member]
Tax years that under examination in the major tax jurisdictions
Tax Year	2000
Massachusetts [Member]
Tax years that under examination in the major tax jurisdictions
Tax Year	2006
New Jersey [Member]
Tax years that under examination in the major tax jurisdictions
Tax Year	2007
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