Accrued Liabilities (Changes in Restructuring Reserve Activity) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Restructuring Cost and Reserve [Line Items]
Charges	$ 5,008	$ 22,216
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges, beginning of period	3,395	507
Charges	5,008	23,673
Payments	2,409	18,572
Foreign currency exchange rate changes	180	77
Non-cash activity	(1,166)	(2,290)
Restructuring charges, end of period	5,008	3,395
Employee Severance [Member] | Hydraulics Systems Realignment [Member]
Restructuring Cost and Reserve [Line Items]
Charges	3,758
Restructuring charges, end of period	3,758
Employee Severance [Member] | Engine Systems Realignment [Member]
Restructuring Cost and Reserve [Line Items]
Charges	1,250
Restructuring charges, end of period	1,250
Employee Severance [Member] | Duarte Relocation Restructuring Charge Reserve
Restructuring Cost and Reserve [Line Items]
Restructuring charges, beginning of period		440
Payments		440
Employee Severance [Member] | Industrial Turbomachinery Business Realignment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges, beginning of period		67
Payments		67
Employee Severance [Member] | Covid-19 Pandemic [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges, beginning of period	3,395
Charges		23,673
Payments	2,409	18,065
Foreign currency exchange rate changes	180	77
Non-cash activity	$ (1,166)	(2,290)
Restructuring charges, end of period		$ 3,395