Segment Information (Consolidated Total Assets by Segment) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Sep. 30, 2016
Assets	$ 2,607,160	$ 2,642,362
Other unallocated assets	178,103	209,683
Property, plant and equipment, net	888,235	876,350
Aerospace [Member]
Assets	1,655,431	1,637,522
Industrial [Member]
Assets	681,722	705,169
Unallocated Corporate [Member]
Property, plant and equipment, net	$ 91,904	$ 89,988