Retirement Plans (Tables)

6 Months Ended

Jul. 02, 2017

Defined Benefit Pension Plans

Net Periodic Pension and Postretirement Cost (Income)

For the three and six months ended July 2, 2017 and July 3, 2016, Teradyne’s net periodic pension (income) cost was comprised of the following:

	For the Three Months Ended
	July 2, 2017						July 3, 2016
	United States			Foreign			United States			Foreign
	(in thousands)
Service cost	$	560		$	206		$	575		$	199
Interest cost		3,264			179			3,401			199
Expected return on plan assets		(3,004	)		(6	)		(3,472	)		(5	)
Amortization of prior service cost		18			—			24			—
Net actuarial (gain) loss		(2,732	)		243			(654	)		—
Total net periodic pension (income) cost	$	(1,894	)	$	622		$	(126	)	$	393

	For the Six Months Ended
	July 2, 2017						July 3, 2016
	United States			Foreign			United States			Foreign
	(in thousands)
Service cost	$	1,120		$	392		$	1,151		$	406
Interest cost		6,576			342			6,815			405
Expected return on plan assets		(6,004	)		(12	)		(6,915	)		(11	)
Amortization of prior service cost		35			—			48			—
Net actuarial (gain) loss		(2,732	)		243			(1,848	)		—
Settlement		—			—			—			(238	)
Total net periodic pension (income) cost	$	(1,005	)	$	965		$	(749	)	$	562

Postretirement Benefit Plans

Net Periodic Pension and Postretirement Cost (Income)

For the three and six months ended July 2, 2017 and July 3, 2016, Teradyne’s net periodic postretirement income was comprised of the following:

	For the Three Months Ended						For the Six Months Ended
	July 2, 2017			July 3, 2016			July 2, 2017			July 3, 2016
	(in thousands)
Service cost	$	7		$	9		$	17		$	19
Interest cost		50			53			100			109
Amortization of prior service benefit		(124	)		(154	)		(248	)		(304	)
Actuarial gain		(15	)		(15	)		(15	)		(15	)
Total net periodic post-retirement benefit	$	(82	)	$	(107	)	$	(146	)	$	(191	)