Employee Benefit Plan (Tables) - Non-U.S. Plan

12 Months Ended

Dec. 31, 2017

Employee Benefit Plan

Schedule of net periodic pension cost

	Year ended December 31,
	2017		2016		2015
Service cost (gross)	$	1,397	$	783	$	601
Interest cost		188		243		261
Expected return on plan assets		(199)		(157)		(162)
Amortization of unrecognized actuarial gain		45		—		—
Net periodic pension cost	$	1,431	$	869	$	700

Summary of net unfunded status of pension plans

	As of December 31,
	2017		2016
Fair value of plan assets	$	12,390	$	11,024
Projected benefit obligation		(18,308)		(16,690)
Net unfunded benefit obligation	$	(5,918)	$	(5,666)

Schedule of change in the fair value of plan assets

	Year ended December 31,
	2017		2016
Fair value of plan assets at January 1	$	11,024	$	9,264
Employee contributions		530		458
Actual return on plan assets		91		63
Benefits (paid), net of transfers		(1,277)		752
Employer contributions		992		832
Foreign exchange adjustment		1,030		(345)
Fair value of plan assets at December 31	$	12,390	$	11,024

Schedule of change in benefit obligations

	Year ended December 31,
	2017		2016
Benefit obligations at January 1	$	16,690	$	12,674
Gross service cost		1,397		783
Interest cost		188		243
Employee contributions		530		458
Actuarial losses		30		2,296
Plan amendment		(356)		—
Benefits (paid), net of transfers		(1,277)		752
Foreign exchange adjustment		1,106		(516)
Benefit obligations at December 31	$	18,308	$	16,690

Summary of weighted average assumptions

	As of December 31, 2017
	2017			2016
	(%)
Discount rates	0.7	-	1.5	0.7	-	1.6
Inflation	1.0	-	1.8	1.0	-	1.8
Expected return on plan assets	1.3	-	2.0	1.3	-	2.0
Rate of salary increases	2.0	-	2.8	2.0	-	2.8

Schedule of projected future pension benefits

2018	$	529
2019		460
2020		478
2021		742
2022		1,169
Beyond		4,044