DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Details) (USD $)	3 Months Ended
	Mar. 31, 2012 hedge	Dec. 31, 2012	Dec. 31, 2011 Derivative Contracts Designated as Hedging Instruments	Dec. 31, 2011 Derivative Contracts Designated as Hedging Instruments Foreign Exchange Contracts Accounts payable and accrued liabilities	Dec. 31, 2012 Derivative Contracts Not Designated as Hedging Instruments	Dec. 31, 2011 Derivative Contracts Not Designated as Hedging Instruments	Dec. 31, 2012 Derivative Contracts Not Designated as Hedging Instruments Foreign Exchange Contracts Prepayments and other	Dec. 31, 2011 Derivative Contracts Not Designated as Hedging Instruments Foreign Exchange Contracts Prepayments and other	Dec. 31, 2012 Derivative Contracts Not Designated as Hedging Instruments Foreign Exchange Contracts Miscellaneous Other Assets	Dec. 31, 2012 Derivative Contracts Not Designated as Hedging Instruments Foreign Exchange Contracts Accounts payable and accrued liabilities	Dec. 31, 2011 Derivative Contracts Not Designated as Hedging Instruments Foreign Exchange Contracts Accounts payable and accrued liabilities	Dec. 31, 2012 Derivative Contracts Not Designated as Hedging Instruments Foreign Exchange Contracts Deferred and other non-current liabilities	Dec. 31, 2011 Derivative Contracts Not Designated as Hedging Instruments Foreign Exchange Contracts Deferred and other non-current liabilities
DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES
Number of foreign currency cash flow hedge previously held	1
Aggregate amount of forward exchange contracts, outstanding		$ 95,000,000
Fair Value of Derivative Instruments
Derivative Assets					1,314,000	520,000	332,000	520,000	982,000
Derivative Liabilities			$ 302,000	$ 302,000	$ 2,261,000	$ 10,388,000				$ 2,097,000	$ 8,383,000	$ 164,000	$ 2,005,000