Revenue (Schedule of Disaggregation of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Total net sales	$ 720,355	$ 652,811
United States [Member]
Disaggregation of Revenue [Line Items]
Total net sales	415,004	336,637
Germany [Member]
Disaggregation of Revenue [Line Items]
Total net sales	68,716	76,113
Europe, excluding Germany [Member]
Disaggregation of Revenue [Line Items]
Total net sales	89,488	98,960
China
Disaggregation of Revenue [Line Items]
Total net sales	64,088	65,889
Asia, excluding China [Member]
Disaggregation of Revenue [Line Items]
Total net sales	38,893	37,535
Other Countries [Member]
Disaggregation of Revenue [Line Items]
Total net sales	44,166	37,677
Aerospace [Member]
Disaggregation of Revenue [Line Items]
Total net sales	473,925	392,887
Aerospace [Member] | United States [Member]
Disaggregation of Revenue [Line Items]
Total net sales	363,912	286,745
Aerospace [Member] | Germany [Member]
Disaggregation of Revenue [Line Items]
Total net sales	17,278	12,749
Aerospace [Member] | Europe, excluding Germany [Member]
Disaggregation of Revenue [Line Items]
Total net sales	38,987	39,612
Aerospace [Member] | China
Disaggregation of Revenue [Line Items]
Total net sales	10,212	15,638
Aerospace [Member] | Asia, excluding China [Member]
Disaggregation of Revenue [Line Items]
Total net sales	6,981	8,368
Aerospace [Member] | Other Countries [Member]
Disaggregation of Revenue [Line Items]
Total net sales	36,555	29,775
Aerospace [Member] | Commercial OEM [Member]
Disaggregation of Revenue [Line Items]
Total net sales	158,666	140,508
Aerospace [Member] | Commercial Aftermarket [Member]
Disaggregation of Revenue [Line Items]
Total net sales	125,928	111,348
Aerospace [Member] | Defense OEM [Member]
Disaggregation of Revenue [Line Items]
Total net sales	140,926	101,836
Aerospace [Member] | Defense Aftermarket [Member]
Disaggregation of Revenue [Line Items]
Total net sales	48,405	39,195
Industrial [Member]
Disaggregation of Revenue [Line Items]
Total net sales	246,430	259,924
Industrial [Member] | United States [Member]
Disaggregation of Revenue [Line Items]
Total net sales	51,092	49,892
Industrial [Member] | Germany [Member]
Disaggregation of Revenue [Line Items]
Total net sales	51,438	63,364
Industrial [Member] | Europe, excluding Germany [Member]
Disaggregation of Revenue [Line Items]
Total net sales	50,501	59,348
Industrial [Member] | China
Disaggregation of Revenue [Line Items]
Total net sales	53,876	50,251
Industrial [Member] | Asia, excluding China [Member]
Disaggregation of Revenue [Line Items]
Total net sales	31,912	29,167
Industrial [Member] | Other Countries [Member]
Disaggregation of Revenue [Line Items]
Total net sales	7,611	7,902
Industrial [Member] | Reciprocating Engines [Member]
Disaggregation of Revenue [Line Items]
Total net sales	174,653	196,130
Industrial [Member] | Industrial Turbines [Member]
Disaggregation of Revenue [Line Items]
Total net sales	51,500	49,512
Industrial [Member] | Renewables [Member]
Disaggregation of Revenue [Line Items]
Total net sales	$ 20,277	$ 14,282