Retirement Plans (Tables)

9 Months Ended

Sep. 30, 2020

Defined Benefit Plan Disclosure

Schedule of Costs of Retirement Plans

The following table summarizes the expense associated with the contributions made to these plans for the periods presented:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
United States	$	346	$	602	$	558	$	1,744
Canada	25		29		93		102
United Kingdom	111		103		321		328
	$	482	$	734	$	972	$	2,174

United States

Defined Benefit Plan Disclosure

Schedule of Net Benefit Costs

Net periodic pension costs for the United States defined benefit pension plan for the three and nine months ended September 30, 2020 and 2019 were as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Interest cost	$	56	$	162	$	168	$	486
Expected return on plan assets	(58)		(180)		(173)		(540)
Recognized net actuarial loss	13		31		40		94
Net periodic pension cost	$	11	$	13	$	35	$	40

United Kingdom

Defined Benefit Plan Disclosure

Schedule of Net Benefit Costs

Net periodic pension costs for the United Kingdom defined benefit pension plan for the three and nine months ended September 30, 2020 and 2019 were as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Interest cost	$	43	$	53	$	129	$	159
Expected return on plan assets	(59)		(60)		(177)		(180)
Amortization of prior service costs and transition amount	6		10		18		30
Recognized net actuarial loss	63		52		189		156
Net periodic pension cost	$	53	$	55	$	159	$	165