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BENEFIT PLANS: (Tables) | 9 Months Ended
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Sep. 30, 2013
Post retirement defined benefit plans |
Components of net periodic benefit costs |
Schedule of the components of net periodic benefit costs | The components of the net periodic benefit costs for the nine months ended September 30, 2013 and 2012 are as follows (in millions):
|  | 2013 |  | 2012 |
Interest cost |  | $ | 0.8 |  | $ | 0.9 |
Service cost |  | 1.0 |  | 0.7 |
Expected return on plan assets |  | (2.5 | ) | (2.7 | )
Amortization of net loss |  | 0.1 |  | 0.1 |
Amortization of net actuarial loss |  | (0.6 | ) | (0.6 | )
Net periodic benefit cost |  | $ | (1.2 | ) | $ | (1.6 | )
Post-retirement health care plan |
Components of net periodic benefit costs |
Schedule of the components of net periodic benefit costs | The components of the net periodic cost for the nine months ended September 30, 2013 and 2012 are as follows (in millions):
|  | 2013 |  | 2012 |
Interest cost |  | $ | 1.2 |  | $ | 1.1 |
Amortization of net loss (gain) |  | — |  | (0.2 | )
Amortization of prior service cost (credit) |  | — |  | — |
Net periodic benefit cost |  | $ | 1.2 |  | $ | 0.9 |

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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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