Retirement Plans (Tables)

6 Months Ended

Jun. 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:

	Three Months Ended June 30,				Six Months Ended June 30,
	2020		2019		2020		2019
United States	$	433	$	680	$	295	$	1,230
Canada	30		34		69		72
United Kingdom	101		118		210		225
	$	564	$	832	$	574	$	1,527

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 six months ended June 30, 2020 and 2019 were as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2020		2019		2020		2019
Interest cost	$	56	$	162	$	112	$	324
Expected return on plan assets	(58)		(180)		(115)		(360)
Recognized net actuarial loss	13		31		27		63
Net periodic pension cost	$	11	$	13	$	24	$	27

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 six months ended June 30, 2020 and 2019 were as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2020		2019		2020		2019
Interest cost	$	43	$	54	$	86	$	108
Expected return on plan assets	(58)		(61)		(116)		(122)
Amortization of prior service costs and transition amount	6		11		12		22
Recognized net actuarial loss	63		53		126		106
Net periodic pension cost	$	54	$	57	$	108	$	114