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Pension and Postretirement Benefits (Tables) | 3 Months Ended
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Mar. 31, 2018
Compensation And Retirement Disclosure [Abstract] |
Components of Net Periodic Benefit Cost of Pension and Postretirement Benefit Plans | The components of net periodic benefit cost of our pension and postretirement benefit plans for the three months ended March 31, 2018 and 2017 consist of the following:
|  | Domestic Plans |  |  |  |  |  |  |  |  |
|  | Pension Plans |  |  | Postretirement Benefit Plans |  |  | Foreign Pension Plans |
(in thousands) |  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
Service cost |  | $ | 2 |  |  | $ | 9 |  |  | $ | 24 |  |  | $ | 30 |  |  | $ | 142 |  |  | $ | 130 |
Interest cost |  |  | 187 |  |  |  | 229 |  |  |  | 94 |  |  |  | 126 |  |  |  | 92 |  |  |  | 114 |
Expected return on plan assets |  |  | (35 | ) |  |  | (39 | ) |  |  | — |  |  |  | — |  |  |  | (129 | ) |  |  | (148 | )
Amortization of prior service credit |  |  | — |  |  |  | — |  |  |  | (84 | ) |  |  | (111 | ) |  |  | — |  |  |  | — |
Recognized net actuarial loss |  |  | 122 |  |  |  | 136 |  |  |  | 52 |  |  |  | 100 |  |  |  | 41 |  |  |  | 45 |
Net periodic benefit cost |  | $ | 276 |  |  | $ | 335 |  |  | $ | 86 |  |  | $ | 145 |  |  | $ | 146 |  |  | $ | 141 |

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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + 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 (h) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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