Annual report pursuant to Section 13 and 15(d)

Segments - Reconciliation Property Plant and Equipment, US and Foreign Jurisdictions (Details)

v3.8.0.1
Segments - Reconciliation Property Plant and Equipment, US and Foreign Jurisdictions (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, net $ 146,557 $ 122,831
U.S.    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, net 89,114 100,716
Foreign    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, net $ 57,443 $ 22,115