Employee Benefit Plans

6 Months Ended

Mar. 31, 2022

Retirement Benefits [Abstract]

Employee benefit plans

Employee Benefit Plans

The Company maintains multiple employee benefit plans.

Certain of the Company’s employees in the UK were participants in a Siemens defined benefit plan established for employees of a UK-based operation acquired by Siemens in 2004. The plan was frozen with respect to future service credits for active employees, however the benefit formula recognized future compensation increases. The Company agreed to establish a replacement defined benefit plan, with the assets of the Siemens scheme transferring to the new scheme on April 1, 2015.

The Company’s employees in Germany also participate in a defined benefit plan. Assets equaling the plan’s accumulated benefit obligation were transferred to a German defined benefit plan sponsored by the Company upon the acquisition of EWT from Siemens. The German entity also sponsors a defined benefit plan for a small group of employees located in France.

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

	Three Months Ended March 31,				Six Months Ended March 31,
	2022		2021		2022		2021
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

The components of pension expense, other than the service cost component which is included in General and administrative expense, are included in the line item Other operating expense in the Unaudited Consolidated Statements of Operations.