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Revenue (Schedule of Revenue Recognition Time) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Disaggregation of Revenue [Line Items]
Net sales	$ 758,844	$ 548,249	$ 1,411,655	$ 1,018,397
Point In Time [Member]
Disaggregation of Revenue [Line Items]
Net sales	371,806		707,982
Over Time [Member]
Disaggregation of Revenue [Line Items]
Net sales	387,038		703,673
Aerospace [Member]
Disaggregation of Revenue [Line Items]
Net sales	482,954		875,841
Aerospace [Member] | Point In Time [Member]
Disaggregation of Revenue [Line Items]
Net sales	208,183		372,197
Aerospace [Member] | Over Time [Member]
Disaggregation of Revenue [Line Items]
Net sales	274,771		503,644
Industrial [Member]
Disaggregation of Revenue [Line Items]
Net sales	275,890		535,814
Industrial [Member] | Point In Time [Member]
Disaggregation of Revenue [Line Items]
Net sales	163,623		335,785
Industrial [Member] | Over Time [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 112,267		$ 200,029

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
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-Name Accounting Standards Codification
-Topic 606
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-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045

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