Employee Benefit Plans (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Retirement Benefits [Abstract]
Service cost	$ 143	$ 227	$ 280	$ 459
Interest cost	205	107	401	215
Expected return on plan assets	(114)	(129)	(222)	(261)
Amortization of actuarial (gains) losses	(15)	166	(28)	335
Pension expense for defined benefit plans	$ 219	$ 371	$ 431	$ 748