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Venezuelan Operations (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
USD ($)
exchange_rate
VEF / $
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Foreign Operations Disclosure [Line Items]      
Revenue from Venezuelan operations $ 40,898 $ 187,588 $ 415,932
Operating income (loss) from Venezuelan operations $ (28,329) $ (74,962) $ 43,939
Number of exchange rates | exchange_rate 3    
Official Exchange Rate [Member] | Venezuela [Member]      
Foreign Operations Disclosure [Line Items]      
Foreign currency exchange rate | VEF / $ 6.30    
SICAD [Member] | Venezuela [Member]      
Foreign Operations Disclosure [Line Items]      
Foreign currency exchange rate | VEF / $ 13.50    
SIMADI [Member] | Venezuela [Member]      
Foreign Operations Disclosure [Line Items]      
Foreign currency exchange rate | VEF / $ 198.70    
Local currency denominated assets subject to remeasurement [Abstract]      
Net assets subject to remeasurement $ 1,300    
Cash and cash equivalents 3,900    
Non-monetary assets 58,100    
Property, property, plant and equipment $ 47,600