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Post-Retirement Benefit Plans (Tables)
 12 Months Ended
Dec. 31, 2017
Compensation and Retirement Disclosure [Abstract]  
Schedule Of Defined Benefit Plan Assumptions
The benefit obligation is calculated as the present value of estimated future benefits to be paid, using the following assumptions for the years ended December 31: 
Retirement Benefit Obligation Assumptions:
 
2017
 
2016
 
2015
 
 
 
 
 
 
 
Compensation rate increase
 
3.00
%
 
3.00
%
 
3.00
%
Discount rate
 
1.25
%
 
1.31
%
 
2.03
%
Employee turn-over
 
Actuarial standard and average of the last 5 years
Average age of retirement
 
60 to 65 years actuarial standard based on age and professional status
Schedule of Changes in Accumulated Postemployment Benefit Obligations
Changes in the funded status of the retirement indemnity benefit plans were as follows for the years ended December 31: 
Retirement Benefit Obligation Activity:
 
2017
 
2016
 
 
 
 
 
Retirement indemnity benefit obligation, beginning of year
 
$
2,431

 
$
2,170

Service cost
 
132

 
123

Interest cost
 
21

 
29

Plan amendment
 
(829
)
 
—

Curtailment gain
 
(717
)
 
—

Actuarial (loss) gain
 
(25
)
 
203

Exchange rate changes
 
290

 
(94
)
Retirement indemnity benefit obligation, end of year
 
$
1,303

 
$
2,431
Schedule Of Defined Benefit Plan Expected Future Benefit
The future expected benefits to be paid over the next five years and for the five years thereafter is as follows for the years ended December 31: 
Future Retirement Indemnity Benefit Obligation:
 
Balance
 
 
 

2018
 
$
—

2019
 
12

2020
 
—

2021
 
—

2022
 
—

Next five years
 
198

Total
 
210