Annual report pursuant to Section 13 and 15(d)

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

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Segments - Reconciliation Property Plant and Equipment, US and Foreign Jurisdictions (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, net $ 144,674 $ 146,557
U.S.    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, net 76,907 89,114
Foreign    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, net $ 67,767 $ 57,443