Retirement Plans (Tables)

3 Months Ended

Apr. 04, 2021

Defined Benefit Pension Plans

Net Periodic Pension and Postretirement Benefit Costs

For the three months ended April 4, 2021 and March 29, 2020, Teradyne’s net periodic pension cost was comprised of the following:

	For the Three Months Ended
	April 4, 2021						March 29, 2020
	United States			Foreign			United States			Foreign
	(in thousands)
Service cost	$	453		$	243		$	433		$	201
Interest cost		1,100			87			1,522			115
Expected return on plan assets		(936	)		(16	)		(1,233	)		(15	)
Total net periodic pension cost	$	617		$	314		$	722		$	301

Postretirement Benefit Plans

Net Periodic Pension and Postretirement Benefit Costs

For the three months ended April 4, 2021 and March 29, 2020, Teradyne’s net periodic postretirement benefit cost was comprised of the following:

	For the Three Months Ended
	April 4, 2021			March 29, 2020
	(in thousands)
Service cost	$	16		$	11
Interest cost		44			62
Amortization of prior service credit		(2	)		(2	)
Total net periodic postretirement benefit cost	$	58		$	71