DEBT AND CREDIT FACILITIES (Details) (USD $)	9 Months Ended				9 Months Ended									3 Months Ended	6 Months Ended
	Aug. 31, 2013	Nov. 30, 2012	Aug. 31, 2013 Minimum	Aug. 31, 2013 Maximum	Aug. 31, 2013 Cash Borrowings	Aug. 31, 2013 Swing Line Loans	Aug. 31, 2013 Letters of Credit	Aug. 31, 2013 Additional Borrowings For Letters Of Credit Or Cash	Aug. 31, 2013 Revolving Line Of Credit	Jun. 30, 2013 Revolving Line Of Credit	Aug. 31, 2013 Letter Of Credit Two	Aug. 31, 2013 Guarantee Credit Line	Nov. 30, 2012 Guarantee Credit Line	Aug. 31, 2013 Convertible Debt	May 31, 2013 Convertible Debt
Line of Credit Facility [Line Items]
Unsecured revolving credit facility maturity date					Dec. 19, 2016
Revolving credit facility capacity					$ 250,000,000.0	$ 10,000,000.0	$ 50,000,000.0		$ 10,000,000	$ 20,000,000
Lines of credit facility maximum borrowings capacity increase								100,000,000.0
Lines of credit facility potential maximum borrowings capacity								350,000,000.0
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														3,400,000	3,400,000
Interest expense amortization period	5 years
Default applicable interest rate on all obligations	2.00%
Interest coverage ratio			3.50
Leverage ratio				3.0
Leverage ratio two years from second quarter of current fiscal year				2.75
Credit facility outstanding											1,000,000
Guarantee facility, maximum capacity												15,900,000
Bank guarantees												13,500,000	12,500,000
Restricted cash	$ 15,600,000	$ 14,600,000