Segment Information (Property, Plant, and Equipment - Net by Geographical Area) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Sep. 30, 2014
Property, plant and equipment, net	$ 756,100	$ 513,279
United States [Member]
Property, plant and equipment, net	704,686	457,563
Germany [Member]
Property, plant and equipment, net	25,634	26,898
Other Countries [Member]
Property, plant and equipment, net	$ 25,780	$ 28,818