Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(12))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(11))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Name:	us-gaap_Assets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Segment Information (Narrative) (Details) $ in Thousands	Oct. 01, 2017	Jun. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)
Segment Reporting Information
Number of Reportable Segments	3
Segment Assets		$ 2,978,853	$ 3,090,592
Space And Defense Controls
Segment Reporting Information
Segment Assets		645,000
Industrial Systems
Segment Reporting Information
Segment Assets		1,120,000
Corporate
Segment Reporting Information
Segment Assets		$ 81,000	$ 270,411