Employee Benefit Plans (Tables)

6 Months Ended

Mar. 31, 2021

Retirement Benefits [Abstract]

Schedule of net benefit costs

The components of net periodic benefit cost for the plans were as follows:

	Three Months Ended March 31,				Six Months Ended March 31,
	2021		2020		2021		2020
Service cost	$	287	$	259	$	571	$	520
Interest cost	80		68		159		136
Expected return on plan assets	(87)		(29)		(174)		(59)
Amortization of actuarial losses	110		235		374		471
Pension expense for defined benefit plans	$	390	$	533	$	930	$	1,068