Employee Benefit Plans (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Retirement Benefits [Abstract]
Service cost	$ 232	$ 284
Interest cost	108	79
Expected return on plan assets	(132)	(87)
Amortization of actuarial losses	169	264
Pension expense for defined benefit plans	$ 377	$ 540