Employee Benefit Plans (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Retirement Benefits [Abstract]
Service cost	$ 227	$ 287	$ 459	$ 571
Interest cost	107	80	215	159
Expected return on plan assets	(129)	(87)	(261)	(174)
Amortization of actuarial losses	166	110	335	374
Pension expense for defined benefit plans	$ 371	$ 390	$ 748	$ 930