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GOODWILL (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Changes in the carrying amount of goodwill    
Balance at beginning of year $ 89,961 $ 90,953
Goodwill acquired during year (note 5) 31,107  
Goodwill allocated to discontinued operations (note 6) (25,956)  
Foreign currency translation adjustments 2,849 (992)
Balance at end of year $ 97,961 $ 89,961