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ACCUMULATED OTHER COMPREHENSIVE INCOME (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]    
Foreign currency translation $ 3,944 $ 11,627
Actuarial gains related to defined benefit pension plans (5,081) (5,066)
Net unrealized (losses) gains on investments (488) (149)
Total accumulated other comprehensive income $ (1,625) $ 6,412