Retirement Plans (Tables)

9 Months Ended

Sep. 30, 2018

Retirement Benefits [Abstract]

Net Pension Income or Postretirement Expense

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

	Three Months Ended					Nine Months Ended
	September 30,		September 30,			September 30,		September 30,
	2018		2017			2018		2017
Net pension expense (income)	$	77	$	(492	)	$	234	$	(1,416	)

The components of net pension expense (income) for our domestic and foreign plans include the following: 

	DomesticPension Plans						Foreign Pension Plans
	Three Months Ended						Three Months Ended
	September 30,			September 30,			September 30,			September 30,
	2018			2017			2018			2017
Service cost	$	—		$	—		$	11		$	12
Interest cost	1,781			2,068			10			8
Expected return on plan assets (1)	(3,225		)	(4,060		)	(6		)	(5		)
Amortization of loss	1,466			1,446			40			39
Expense (income), net	$	22		$	(546	)	$	55		$	54

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

	Domestic Pension Plans						Foreign Pension Plans
	Nine Months Ended						Nine Months Ended
	September 30,			September 30,			September 30,			September 30,
	2018			2017			2018			2017
Service cost	$	—		$	—		$	33		$	36
Interest cost	5,343			6,204			32			25
Expected return on plan assets (1)	(9,675		)	(12,181		)	(19		)	(15		)
Amortization of loss	4,398			4,338			122			116
Other cost due to retirement	—			61			—			—
Expense (income), net	$	66		$	(1,578	)	$	168		$	162

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

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

	Three Months Ended						Nine Months Ended
	September 30,			September 30,			September 30,			September 30,
	2018			2017			2018			2017
Service cost	$	—		$	—		$	1		$	1
Interest cost	39			41			117			121
Amortization of gain	(11		)	(25		)	(34		)	(75		)
Expense, net	$	28		$	16		$	84		$	47