Retirement Plans (Tables)

6 Months Ended

Jul. 03, 2016

Defined Benefit Pension Plans

Net Periodic Pension and Postretirement (Income) Cost

For the three and six months ended July 3, 2016 and July 5, 2015, Teradyne’s net periodic pension (income) cost was comprised of the following:

	For the Three Months Ended
	July 3, 2016						July 5, 2015
	United States			Foreign			United States			Foreign
	(in thousands)
Service cost	$	575		$	199		$	615		$	263
Interest cost		3,401			199			3,289			385
Expected return on plan assets		(3,472	)		(5	)		(3,634	)		(215	)
Amortization of prior service cost		24			—			34			—
Actuarial gain		(654	)		—			(3	)		—
Total net periodic pension (income) cost	$	(126	)	$	393		$	301		$	433
	For the Six Months Ended
	July 3, 2016						July 5, 2015
	United States			Foreign			United States			Foreign
	(in thousands)
Service cost	$	1,151		$	406		$	1,231		$	510
Interest cost		6,815			405			6,571			744
Expected return on plan assets		(6,915	)		(11	)		(7,259	)		(410	)
Amortization of prior service cost		48			—			67			—
Actuarial gain		(1,848	)		—			(3	)		—
Settlement		—			(238	)		—			—
Total net periodic pension (income) cost	$	(749	)	$	562		$	607		$	844

Postretirement Benefit Plans

Net Periodic Pension and Postretirement (Income) Cost

For the three months and six months ended July 3, 2016 and July 5, 2015, Teradyne’s net periodic postretirement income was comprised of the following:

	For the Three Months Ended						For the Six Months Ended
	July 3, 2016			July 5, 2015			July 3, 2016			July 5, 2015
	(in thousands)
Service cost	$	9		$	12		$	19		$	24
Interest cost		53			59			109			118
Amortization of prior service income		(154	)		(150	)		(304	)		(299	)
Actuarial gain		(15	)		(19	)		(15	)		(19	)
Total net periodic post-retirement benefit	$	(107	)	$	(98	)	$	(191	)	$	(176	)