Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2017

The net periodic benefit costs for the plans included the following components:


	Year Ended December 31,
	2017			2016
Service cost	$	708		$	479
Interest cost on projected benefit obligations		458			377
Expected return on plan assets		(116	)		(84	)
Amortization of actuarial net loss		400			406

	$	1,450		$	1,178

Summary of Changes in Projected Benefit Obligations and Plan Assets, and Ending Balances of Defined Benefit Plans

The changes in projected benefit obligations and plan assets, as well as the ending balance sheet amounts for the Company’s defined benefit plans, were as follows:


	Year Ended December 31,
	2017			2016
Change in projected benefit obligations:
Projected benefit obligations, beginning of year(1)	$	23,450		$	2,134
Liabilities assumed through acquisition		—			22,437
Service cost		708			479
Interest cost		458			377
Actuarial (gain) loss		(312	)		1,085
Benefits paid		(1,271	)		(897	)
Currency translation adjustments		2,703			(2,165	)

Projected benefit obligations, end of year	$	25,736		$	23,450

Change in plan assets:
Fair value of plan assets, beginning of year(1)	$	7,672		$	301
Assets acquired through acquisition		—			7,896
Company contributions		324			741
Gain on plan assets		177			66
Benefits paid		(722	)		(437	)
Currency translation adjustments		701			(895	)

Fair value of plan assets, end of year		8,152			7,672

Net underfunded status	$	(17,584	)	$	(15,778	)

(1)	The beginning of the year balances for the year ended December 31, 2016, relate to plans held in Taiwan and Germany in the Vacuum & Analysis segment. These were not disclosed in prior years as the net liability was not material.

Summary of Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income (Loss)

Changes in plan assets and benefit obligations recognized in other comprehensive income (loss) included the following components:


	Year Ended December 31,
	2017			2016
Amounts recognized in accumulated comprehensive income:
Accumulated net actuarial (gain) loss	$	(235	)	$	465
Income tax benefit		(88	)		(199	)

Accumulated other comprehensive (benefit) loss	$	(323	)	$	266

Summary of Estimated Benefit Payments for Next 10 Years

As of December 31, 2017, the estimated benefit payments for the next 10 years were as follows:


	Estimated benefit payments
2018	$	2,283
2019		2,786
2020		2,900
2021		2,997
2022		2,858
2023-2027		13,027

	$	26,851

Schedule of Weighted Average Rates Used to Determine Net Periodic Benefit Costs

The weighted-average rates used to determine the net periodic benefit costs were as follows:


	December 31, 2017
Discount rate		1.8	%
Rate of increase in salary levels		2.2
Expected long-term rate of return on assets		1.9

Schedule of Defined Benefit Plan Assets

Plan assets were held in the following categories as a percentage of total plan assets:


	Year Ended December 31,
	2017
	Amount		Percentage
Cash	$	561		7.0	%
Debt securities		5,242		64.0
Equity securities		1,367		17.0
Other		982		12.0

	$	8,152		100.0	%