Revenue (Schedule of Revenue Recognition Time) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation of Revenue [Line Items]
Net sales	$ 752,005	$ 588,117	$ 2,163,660	$ 1,606,514
Point In Time [Member]
Disaggregation of Revenue [Line Items]
Net sales	338,710		1,046,692
Over Time [Member]
Disaggregation of Revenue [Line Items]
Net sales	413,295		1,116,968
Aerospace [Member]
Disaggregation of Revenue [Line Items]
Net sales	498,775		1,374,616
Aerospace [Member] | Point In Time [Member]
Disaggregation of Revenue [Line Items]
Net sales	191,516		563,713
Aerospace [Member] | Over Time [Member]
Disaggregation of Revenue [Line Items]
Net sales	307,259		810,903
Industrial [Member]
Disaggregation of Revenue [Line Items]
Net sales	253,230		789,044
Industrial [Member] | Point In Time [Member]
Disaggregation of Revenue [Line Items]
Net sales	147,194		482,979
Industrial [Member] | Over Time [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 106,036		$ 306,065