Employee Benefit Plans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Retirement Benefits [Abstract]
Service cost	$ 215	$ 287	$ 674	$ 858
Interest cost	100	81	315	240
Expected return on plan assets	(122)	(88)	(383)	(262)
Amortization of actuarial losses	156	266	491	640
Pension expense for defined benefit plans	$ 349	$ 546	$ 1,097	$ 1,476