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Retirement Benefit Plans (Tables) | 6 Months Ended
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Jun. 30, 2013
Compensation and Retirement Disclosure [Abstract] |
Components of the net periodic benefit cost | The components of the net periodic benefit cost for the three and six months ended June 30, 2013 and 2012 were as follows:
|  | Three Months Ended
|  | June 30
|  | Pension Benefits |  | Postretirement
|  | U.S. Plans |  | Non-U.S. Plans |  | Medical Benefits
|  | 2013 |  | 2012 |  | 2013 |  | 2012 |  | 2013 |  | 2012
Service cost |  | $ | 216 |  |  | $ | 174 |  |  | $ | 33 |  |  | $ | 33 |  |  | $ | 38 |  |  | $ | 35 |
Interest cost |  | 563 |  |  | 483 |  |  | 121 |  |  | 131 |  |  | 110 |  |  | 139 |
Expected return on plan assets |  | (910 | ) |  | (569 | ) |  | (115 | ) |  | (118 | ) |  | — |  |  | — |
Amortization of net actuarial loss (gain) |  | 1,073 |  |  | 282 |  |  | — |  |  | — |  |  | 127 |  |  | 17 |
Amortization of prior service cost |  | (503 | ) |  | 95 |  |  | 80 |  |  | 39 |  |  | (102 | ) |  | (145 | )
Foreign currency |  | — |  |  | — |  |  | (13 | ) |  | 45 |  |  | — |  |  | — |
Net periodic cost |  | $ | 439 |  |  | $ | 465 |  |  | $ | 106 |  |  | $ | 130 |  |  | $ | 173 |  |  | $ | 46 |
|  | Six Months Ended
|  | June 30
|  | Pension Benefits |  | Postretirement
|  | U.S. Plans |  | Non-U.S. Plans |  | Medical Benefits
|  | 2013 |  | 2012 |  | 2013 |  | 2012 |  | 2013 |  | 2012
Service cost |  | $ | 432 |  |  | $ | 339 |  |  | $ | 66 |  |  | $ | 66 |  |  | $ | 76 |  |  | $ | 70 |
Interest cost |  | 1,131 |  |  | 961 |  |  | 243 |  |  | 261 |  |  | 222 |  |  | 279 |
Expected return on plan assets |  | (1,820 | ) |  | (1,140 | ) |  | (231 | ) |  | (235 | ) |  | — |  |  | — |
Amortization of net actuarial loss (gain) |  | 1,096 |  |  | 568 |  |  | — |  |  | — |  |  | 101 |  |  | 34 |
Amortization of prior service cost |  | 46 |  |  | 192 |  |  | 161 |  |  | 77 |  |  | (52 | ) |  | (290 | )
Foreign currency |  | — |  |  | — |  |  | 29 |  |  | 23 |  |  | — |  |  | — |
Net periodic cost |  | $ | 885 |  |  | $ | 920 |  |  | $ | 268 |  |  | $ | 192 |  |  | $ | 347 |  |  | $ | 93 |

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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=21915506&loc=d3e1928-114920 + Details
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