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COMMITMENTS AND CONTINGENCIES (Details) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2012
Schedule Of Guarantees  
Maximum potential undiscounted payments $ 343,557
Performance guarantees through letters of credit
 
Schedule Of Guarantees  
Term 2012-2016
Maximum potential undiscounted payments 225,045
Standby letters of credit
 
Schedule Of Guarantees  
Term 2012-2015
Maximum potential undiscounted payments 19,584
Commercial letters of credit
 
Schedule Of Guarantees  
Term 2012
Maximum potential undiscounted payments 3,807
Bid bonds and performance bonds
 
Schedule Of Guarantees  
Term 2012-2018
Maximum potential undiscounted payments $ 95,121