Revenue (Schedule of Revenue Recognition Time) (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disaggregation Of Revenue [Line Items]
Net sales	$ 537,619	$ 720,355
Aerospace [Member]
Disaggregation Of Revenue [Line Items]
Net sales	321,667	473,925
Industrial [Member]
Disaggregation Of Revenue [Line Items]
Net sales	215,952	246,430
Point In Time [Member]
Disaggregation Of Revenue [Line Items]
Net sales	261,162	355,457
Point In Time [Member] | Aerospace [Member]
Disaggregation Of Revenue [Line Items]
Net sales	106,967	187,515
Point In Time [Member] | Industrial [Member]
Disaggregation Of Revenue [Line Items]
Net sales	154,195	167,942
Over Time [Member]
Disaggregation Of Revenue [Line Items]
Net sales	276,457	364,898
Over Time [Member] | Aerospace [Member]
Disaggregation Of Revenue [Line Items]
Net sales	214,700	286,410
Over Time [Member] | Industrial [Member]
Disaggregation Of Revenue [Line Items]
Net sales	$ 61,757	$ 78,488