Segment Information (Consolidated Total Assets by Segment) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Sep. 30, 2016
Assets	$ 2,576,215	$ 2,642,362
Other unallocated assets	211,033	209,683
Property, plant and equipment, net	877,077	876,350
Aerospace [Member]
Assets	1,611,306	1,637,522
Industrial [Member]
Assets	663,886	705,169
Total of Reporting Segments [Member]
Assets	2,275,192	2,342,691
Unallocated Corporate [Member]
Property, plant and equipment, net	$ 89,990	$ 89,988