Defined Pension Plans - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		9 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Sep. 30, 2023
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Net periodic cost (benefit)	$ 194	$ 99	$ 389	$ 199	$ 733
Contributions			0
Supplemental Employee Retirement Plan
Defined Benefit Plan Disclosure [Line Items]
Net periodic cost (benefit)	$ 112	$ 118	$ 225	$ 236	$ 472