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Pension benefits (Tables) | 12 Months Ended
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Dec. 31, 2016
Compensation and Retirement Disclosure [Abstract] |
Schedule of Accumulated and Projected Benefit Obligations [Table Text Block] | The following table summarizes the amounts recognized in accumulated other comprehensive loss, net of taxes (in thousands):
|  | Years Ended December 31, |
|  | 2016 |  | 2015 |  | 2014 |
Amortization of transition obligation |  | $ | 43 |  | $ | 40 |  | $ | 39 |
Actuarial gain (loss) |  |  | (179) |  |  | 986 |  |  | 574 |
Totals |  | $ | (136) |  | $ | 1,026 |  | $ | 613 |
Amounts in accumulated other comprehensive loss not yet reflected in net periodic pension cost, net of taxes: |  |  |  |  |  |  |  |  |  |
Actuarial gain |  | $ | 1,557 |  | $ | 1,736 |  |  |  |
Transition obligation |  |  | (170) |  |  | (213) |  |  |  |
Totals |  | $ | 1,387 |  | $ | 1,523 |  |  |  |
Amounts in accumulated other comprehensive loss expected to be amortized in 2017 net periodic pension cost, net of taxes: |  |  |  |  |  |  |  |  |  |
Actuarial gain |  | $ | (286) |  |  |  |  |  |  |
Transition obligation |  |  | 38 |  |  |  |  |  |  |
Totals |  | $ | (248) |  |  |  |  |  |  |
Schedule of Changes in Accumulated Postemployment Benefit Obligations [Table Text Block] | Benefit Obligations:
|  | 2016 |  | 2015 |  | 2014 |
Projected benefit obligation at beginning of the year |  | $ | 2,840 |  | $ | 3,531 |  | $ | 3,652 |
Service cost |  |  | 368 |  |  | 477 |  |  | 491 |
Interest cost |  |  | 170 |  |  | 219 |  |  | 222 |
Actuarial gain |  |  | (197) |  |  | (1,119) |  |  | (855) |
Foreign currency exchange rates changes |  |  | (142) |  |  | (199) |  |  | 132 |
Benefits paid |  |  | (143) |  |  | (69) |  |  | (111) |
Projected benefit obligation at end of the year |  | $ | 2,896 |  | $ | 2,840 |  | $ | 3,531 |
Schedule of Net Benefit Costs [Table Text Block] | Components of Net Periodic Pension Cost:
|  | 2016 |  | 2015 |  | 2014 |
Service cost |  | $ | 368 |  | $ | 477 |  | $ | 491 |
Interest cost |  |  | 170 |  |  | 219 |  |  | 222 |
Actuarial loss (gain) recognized |  |  | (315) |  |  | (79) |  |  | 4 |
Net periodic pension cost |  | $ | 223 |  | $ | 617 |  | $ | 717 |
Schedule of Assumptions Used [Table Text Block] | Actuarial assumptions for all non-U.S. plans are described below. The discount rates are used to measure the year end benefit obligations and the earnings effects for the subsequent year. The assumptions for each of the three years in the period ended December 31, 2016 are as follows:
|  | 2016 |  | 2015 |  | 2014 |
Discount rate |  |  | 5.4%-12.5% |  |  | 5%-9.8% |  |  | 4.7%-9.5% |
Rate of increase in compensation level |  |  | 5%-8.5% |  |  | 6%-9% |  |  | 6%-9% |
Schedule of Expected Benefit Payments [Table Text Block] | Estimated Future Benefit Payments: The following benefit payments, which reflect expected future service, as appropriate, are expected to be paid (in thousands):
Years Ending December 31, |  |  |
2017 |  | $ | 530 |
2018 |  |  | 289 |
2019 |  |  | 116 |
2020 |  |  | 221 |
2021 |  |  | 93 |
2022 to 2026 |  |  | 1,259 |
|  | $ | 2,508 |

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- Definition Tabular disclosure of the change in the accumulated postemployment benefit obligation from the beginning to the end of the period, showing separately, if applicable, the effects of the following: service cost, interest cost, contributions by plan participants, actuarial gains and losses, foreign currency exchange rate changes, benefits paid, plan amendments, business combinations, divestitures, curtailments, settlements, and special and contractual termination benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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- Definition Tabular disclosure of benefits expected to be paid by pension plans and/or other employee benefit plans in each of the next five fiscal years and in the aggregate for the five fiscal years thereafter. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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