Segment Information (Details 7) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Net property, plant and equipment	$ 287,671	$ 372,467
Domestic Operations | Domestic - U.S.
Revenues from External Customers and Long-Lived Assets [Line Items]
Net property, plant and equipment	236,003	250,866
International
Revenues from External Customers and Long-Lived Assets [Line Items]
Net property, plant and equipment	51,668	121,601
International | Americas, excluding U.S.
Revenues from External Customers and Long-Lived Assets [Line Items]
Net property, plant and equipment	12,185	12,746
International | Asia Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Net property, plant and equipment	23,994	85,236
International | EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Net property, plant and equipment	$ 15,489	$ 23,619