Property, Plant, and Equipment By Location (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Schedule of Property, Plant, and Equipment by Location
Property, plant, and equipment, net	$ 176,458	$ 190,256
UNITED STATES [Member]
Schedule of Property, Plant, and Equipment by Location
Property, plant, and equipment, net	70,435	72,179
Outside United States [Member]
Schedule of Property, Plant, and Equipment by Location
Property, plant, and equipment, net	$ 106,023	$ 118,077