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Employee Benefit Plan - Change in Benefit Obligation (Details) - Non-U.S. Plan - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Change in benefit obligations
Benefit obligations	$ 18,308	$ 16,690
Gross service cost	1,281	1,397	$ 783
Interest cost	199	188	243
Employee contributions	506	530
Actuarial losses	(672)	30
Plan Amendment	560	(356)
Benefits (paid), net of transfers	(1,601)	(1,277)
Foreign exchange adjustment	(408)	1,106
Benefit obligations	$ 18,173	$ 18,308	$ 16,690

X

- Definition

Amount of payment to participant of defined benefit plan which decreases benefit obligation. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. Also includes the increase (decrease) in benefit obligation of defined benefit plan from amounts transferred into (from) plan.

+ References

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- Definition

Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive plan.

+ References

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Amount of actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.

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- Definition

Amount of contributions received by defined benefit plan from participant which increase benefit obligation.

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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- Definition

Amount of foreign currency translation gain (loss) which (increases) decreases benefit obligation of defined benefit plan.

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- Definition

Amount of cost recognized for passage of time related to defined benefit plan.

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Amount of increase (decrease) in benefit obligation of defined benefit plan from change in terms of existing plan or initiation of new plan.

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Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.

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