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Venezuelan Operations (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
USD ($)
VEF / $
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Mar. 10, 2016
VEF / $
Foreign Operations Disclosure [Line Items]        
Revenue from Venezuelan operations $ 51,615 $ 40,898 $ 187,588  
Operating income (loss) from Venezuelan operations $ (8,608) $ (28,329) $ (74,962)  
DIPRO [Member] | Venezuela [Member]        
Foreign Operations Disclosure [Line Items]        
Foreign currency exchange rate | VEF / $       10.00
DICOM [Member] | Venezuela [Member]        
Foreign Operations Disclosure [Line Items]        
Foreign currency exchange rate | VEF / $ 673.76     215.34
Local currency denominated assets subject to remeasurement [Abstract]        
Net assets subject to remeasurement $ 3,600      
Cash and cash equivalents 9,600      
Non-monetary assets 52,400      
Property, property, plant and equipment $ 42,600