Retirement Plans (Tables)

6 Months Ended

Jun. 30, 2021

Retirement Benefits [Abstract]

Schedule of components of net periodic benefit cost for domestic retirement plan

The components of net periodic benefit cost for the three and six months ended June 30, 2021 and 2020 were as follows:

	Three Months Ended  June 30,				Six Months Ended  June 30,
	2021		2020		2021		2020
Service cost	$	709	$	357	$	1,413	$	708
Interest cost	448		496		894		990
Recognized net actuarial loss	354		214		707		428
Net periodic benefit cost	$	1,511	$	1,067	$	3,014	$	2,126