DEBT AND CREDIT FACILITIES (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended				1 Months Ended				6 Months Ended
	May 31, 2013	Nov. 30, 2012	May 31, 2013 Minimum	May 31, 2013 Maximum	Jun. 30, 2003 Mortgage Note	May 01, 2013 Mortgage Note	Nov. 30, 2012 Mortgage Note	May 31, 2007 Mortgage Note	May 31, 2013 Cash Borrowings	Dec. 31, 2011 Cash Borrowings	May 31, 2013 Swing Line Loans	May 31, 2012 Letters of Credit	May 31, 2012 Additional Borrowings For Letters Of Credit Or Cash	May 31, 2013 Revolving Line Of Credit	Dec. 31, 2011 Cash Borrowing And Letter Of Credit	May 31, 2013 Letter Of Credit One	May 31, 2013 Letter Of Credit Two	May 31, 2013 Guarantee Credit Line	Nov. 30, 2012 Guarantee Credit Line
Line of Credit Facility [Line Items]
Mortgage note payable					$ 54.0
Mortgage note payable, amortization period					20 years
Debt instrument, fixed annual interest rate								5.50%
Debt principal balance						34.7	35.7
Unsecured revolving credit facility maturity date									Dec. 19, 2016
Revolving credit facility capacity										250.0	10.0	50.0		20.0	10.0
Lines of credit facility maximum borrowings capacity increase													100.0
Lines of credit facility potential maximum borrowings capacity													350.0
Basis spread on variable rate			0.25%	1.25%
Spread over LIBOR			1.25%	2.25%
Base rate spread over federal fund rate	0.50%
LIBOR rate interest period	1 month
Base rate spread over LIBOR	1.00%
Loan origination fees and issuance costs	3.4
Interest expense amortization period	5 years
Default applicable interest rate on all obligations	2.00%
Interest coverage ratio			3.5
Leverage ratio				3.25
Leverage ratio one year from second quarter of current fiscal year				3.00
Leverage ratio two years from second quarter of current fiscal year				2.75
Credit facility outstanding																13.0	1.0
Guarantee facility, maximum capacity																		15.6
Bank guarantees																		13.3	12.5
Restricted cash	$ 15.3	$ 14.6