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Other Current Assets (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Other Current Assets: [Abstract]    
Creditable taxes (value added taxes) $ 21,566 $ 24,257
Vendor inventory deposits (prepaid) 8,411 14,820
Prepaid income taxes 15,395 12,269
Deferred income taxes 21,643 22,078
Other 2,365 8,537
Other Assets, Current $ 69,380 $ 81,961