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ACCOUNTING FOR DERIVATIVES (Details) (USD $) |  |  |  |  |  |  | 3 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jun. 30, 2012 country | Jun. 30, 2012 Designated as a hedging instrument Interest rate hedges | Dec. 31, 2011 Designated as a hedging instrument Interest rate hedges | Jun. 30, 2012 Designated as a hedging instrument Interest rate hedges Accrued liabilities | Dec. 31, 2011 Designated as a hedging instrument Interest rate hedges Accrued liabilities | Jun. 30, 2012 Designated as a hedging instrument Interest rate hedges Other long-term liabilities | Dec. 31, 2011 Designated as a hedging instrument Interest rate hedges Other long-term liabilities | Dec. 31, 2010 Terminated hedge Interest rate hedges | Jun. 30, 2012 Terminated hedge Interest rate hedges
ACCOUNTING FOR DERIVATIVES |  |  |  |  |  |  |  |  |
Number of countries in which the company operates | 30 |  |  |  |  |  |  |  |
Fair Value Asset (Liability) |  |  |  |  |  |  |  |  |
Notional amount of interest rate swaps |  | $ 715,000,000 |  |  |  |  |  | $ 585,000,000 |
Notional amount of interest rate swaps which expire on or before August 2012 |  | 465,000,000 |  |  |  |  |  |  |
Weighted average effective fixed interest rate on interest rate swaps (as a percent) |  | 3.60% |  |  |  |  |  | 4.60% |
Deferred pre-tax loss to be reclassified during next 12 months |  | 4,800,000 |  |  |  |  |  |  | 3,800,000
Amount of interest rate swap termination payments |  |  |  |  |  |  |  | 43,000,000 |
Derivatives liability designated as hedging instruments, Fair value |  | $ (12,062,000) | $ (19,446,000) | $ (5,432,000) | $ (14,250,000) | $ (6,630,000) | $ (5,196,000) |  |

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