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Pensions and Other Postretirement Benefit Plans (Tables) | 3 Months Ended
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Mar. 31, 2014
Pensions and Other Postretirement Benefit Plans [Abstract] |
Schedule of Net Periodic Benefit Plan Cost | The composition of the net periodic benefit plan cost for the three months ended March 31, 2014 and 2013 was as follows:
| Pension plans |  | Other postretirement benefits |
(in thousands) | 2014 |  | 2013 |  | 2014 |  | 2013 |
Components of net periodic benefit cost: |  |  |  |  |  |  |  |
Service cost | $825 |  | $842 |  | $79 |  | $285 |
Interest cost | 2,359 |  | 2,000 |  | 686 |  | 802 |
Expected return on assets | (2,371 | ) | (2,034 | ) | - |  | - |
Amortization of prior service cost/(credit) | 13 |  | 9 |  | (1,122 | ) | (917 | )
Amortization of transition obligation | - |  | 17 |  | - |  | - |
Amortization of net actuarial loss | 601 |  | 785 |  | 727 |  | 879 |
Curtailment | (493 | ) | - |  | - |  | - |
Net periodic benefit cost | $934 |  | $1,619 |  | $370 |  | $1,049 |

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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=28361610&loc=d3e1928-114920 + Details
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