Retirement Plans (Tables)

6 Months Ended

Jun. 30, 2013

Post-Retirement Benefit Plans

Teradyne’s net periodic postretirement benefit was comprised of the following:


	For the Three Months Ended						For the Six Months Ended
	June 30, 2013			July 1, 2012			June 30, 2013			July 1, 2012
	(in thousands)
Service cost	$	21		$	15		$	37		$	34
Interest cost		84			108			171			219
Amortization of unrecognized prior service benefit		(150	)		(150	)		(299	)		(299	)
Actuarial gain		(236	)		(92	)		(236	)		(92	)

Total net periodic post-retirement benefit	$	(281	)	$	(119	)	$	(327	)	$	(138	)

Defined Benefit Pension Plans

Net periodic pension (benefit) cost was comprised of the following:


	For the Three Months Ended						For the Six Months Ended
	June 30, 2013			July 1, 2012			June 30, 2013			July 1, 2012
	(in thousands)
Service cost	$	852		$	643		$	1,686		$	1,357
Interest cost		3,281			4,125			6,575			8,185
Expected return on plan assets		(3,631	)		(4,082	)		(7,261	)		(8,164	)
Amortization of unrecognized prior service cost		41			58			82			116
Actuarial (gain) loss		(1,123	)		3,146			(1,047	)		3,146

Total net periodic pension (benefit) cost	$	(580	)	$	3,890		$	35		$	4,640