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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Details) (USD $) | 3 Months Ended |  |  |  |  |  |  |  |  |  |
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Mar. 31, 2012 hedge | Sep. 30, 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 | Sep. 30, 2012 Derivative Contracts Not Designated as Hedging Instruments | Dec. 31, 2011 Derivative Contracts Not Designated as Hedging Instruments | Sep. 30, 2012 Derivative Contracts Not Designated as Hedging Instruments Foreign Exchange Contracts Prepaid and other | Dec. 31, 2011 Derivative Contracts Not Designated as Hedging Instruments Foreign Exchange Contracts Prepaid and other | Sep. 30, 2012 Derivative Contracts Not Designated as Hedging Instruments Foreign Exchange Contracts Miscellaneous Other Assets | Sep. 30, 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 | Sep. 30, 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 |  | $ 98,000,000 |  |  |  |  |  |  |  |  |  |  |
Fair Value of Derivative Instruments |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative Assets |  |  |  |  | 1,161,000 | 520,000 | 407,000 | 520,000 | 754,000 |  |  |  |
Derivative Liabilities |  |  | $ 302,000 | $ 302,000 | $ 2,853,000 | $ 10,388,000 |  |  |  | $ 2,593,000 | $ 8,383,000 | $ 260,000 | $ 2,005,000

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