Revenue (Schedule of Revenue Recognition Time) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Disaggregation of Revenue [Line Items]
Net sales	$ 720,220	$ 758,844	$ 1,440,575	$ 1,411,655
Point In Time [Member]
Disaggregation of Revenue [Line Items]
Net sales	335,377	371,806	690,834	707,982
Over Time [Member]
Disaggregation of Revenue [Line Items]
Net sales	384,843	387,038	749,741	703,673
Aerospace [Member]
Disaggregation of Revenue [Line Items]
Net sales	474,236	482,954	948,161	875,841
Aerospace [Member] | Point In Time [Member]
Disaggregation of Revenue [Line Items]
Net sales	178,325	208,183	365,840	372,197
Aerospace [Member] | Over Time [Member]
Disaggregation of Revenue [Line Items]
Net sales	295,911	274,771	582,321	503,644
Industrial [Member]
Disaggregation of Revenue [Line Items]
Net sales	245,984	275,890	492,414	535,814
Industrial [Member] | Point In Time [Member]
Disaggregation of Revenue [Line Items]
Net sales	157,052	163,623	324,994	335,785
Industrial [Member] | Over Time [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 88,932	$ 112,267	$ 167,420	$ 200,029