Accrued Liabilities (Changes in Restructuring Reserve Activity) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 5,172	$ (3,420)	$ 5,008
Restructuring, Incurred Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]	Restructuring Charges	Restructuring Charges
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges, beginning of period	$ 1,083	$ 5,008
Restructuring Charges	5,172	1,083
Payments	(6,290)	(505)
Non-cash activity	35	(4,503)
Restructuring charges, end of period		1,083	5,008
Employee Severance [Member] | Cost Reduction Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	5,172
Payments	(5,207)
Non-cash activity	35
Employee Severance [Member] | Hydraulics Systems Realignment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges, beginning of period		3,758
Payments		(505)
Non-cash activity		(3,253)
Restructuring charges, end of period			3,758
Employee Severance [Member] | Engine Systems Realignment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges, beginning of period		1,250
Non-cash activity		(1,250)
Restructuring charges, end of period			$ 1,250
Employee Severance [Member] | Aerospace [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges, beginning of period	139
Restructuring Charges		139
Payments	(139)
Restructuring charges, end of period		139
Employee Severance [Member] | Industrial [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges, beginning of period	944
Restructuring Charges		944
Payments	$ (944)
Restructuring charges, end of period		$ 944