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Pension benefits (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items] |  |
Amortization of transition obligation | $ 41 | $ 38
Actuarial gain (loss) | 416 | (226)
Totals | 457 | (188)
Amounts in accumulated other comprehensive loss not yet reflected in net periodic pension cost, net of taxes: |  |
Actuarial gain | 1,747 | 1,331
Transition obligation | (91) | (132)
Totals | 1,656 | $ 1,199
Amounts in accumulated other comprehensive loss expected to be amortized in 2019 net periodic pension cost, net of taxes: |  |
Actuarial gain | (195) |
Transition obligation | 36 |
Totals | $ (159) |

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- Definition Amount of accumulated other comprehensive income (loss) not reflected in net periodic pension cost, net of tax. + References No definition available. + Details
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- Definition Amount of actuarial gain (loss) not reflected in net periodic pension cost, net of tax. + References No definition available. + Details
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- Definition The amounts in accumulated other comprehensive income transition obligation that are not recognized immediately and are expected to be recognized as components of net periodic benefit cost over the next fiscal year that follows the most recent annual statement of financial position presented. + References No definition available. + Details
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