Retirement Plans (Tables)

3 Months Ended

Mar. 31, 2016

Compensation and Retirement Disclosure [Abstract]

Net Pension Income or Postretirement Expense

Net pension income for our domestic and foreign plans was as follows:

	Three Months Ended
	March 31,			March 29,
	2016			2015
Net pension (income)	$	(392	)	$	(528	)

Net pension (income) expense breakdown for our domestic and foreign plans include the following components: 

	DomesticPension Plans						Foreign Pension Plans
	Three Months Ended						Three Months Ended
	March 31,			March 29,			March 31,		March 29,
	2016			2015			2016		2015
Service cost	$	22		$	42		$	12	$	17
Interest cost	2,756			2,815			11		123
Expected return on plan assets (1)	(4,744		)	(5,068		)	7		(133		)
Amortization of loss	1,498			1,585			34		91
Other cost due to retirement	12			—			—		—
(Income) expense, net	$	(456	)	$	(626	)	$	64	$	98

(1) Expected return on plan assets is net of expected investment expenses and certain administrative expenses.

Net post-retirement expense for our post-retirement plan includes the following components:

	Three Months Ended
	March 31,			March 29,
	2016			2015
Other post-retirement benefit plan
Service cost	$	1		$	1
Interest cost	52			51
Amortization of gain	(38		)	(25		)
Post-retirement expense	$	15		$	27