Property, Plant, and Equipment By Location (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014
Schedule of Property, Plant, and Equipment by Location
Property, plant, and equipment, net	$ 190,256	$ 190,699	$ 194,756	$ 192,064	$ 207,152	$ 221,141	$ 233,571	$ 236,045
UNITED STATES [Member]
Schedule of Property, Plant, and Equipment by Location
Property, plant, and equipment, net	72,179				76,130
Outside United States [Member]
Schedule of Property, Plant, and Equipment by Location
Property, plant, and equipment, net	$ 118,077				$ 131,022