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Pension Benefits (Tables) | 6 Months Ended
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Jun. 30, 2013
Pension Benefits [Abstract] |
Net Periodic Pension Cost |
|  | Three months ended June 30, |  | Six months ended June 30,
|  | 2013 |  | 2012 |  | 2013 |  | 2012
Components of net periodic benefit cost |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Service cost |  | $ | 453 |  |  | $ | 373 |  |  | $ | 906 |  |  | $ | 746 |
Interest cost |  |  | 291 |  |  |  | 299 |  |  |  | 582 |  |  |  | 598 |
Expected return on plan assets |  |  | (440 | ) |  |  | (406 | ) |  |  | (880 | ) |  |  | (812 | )
Amortization of prior year service cost |  |  | (5 | ) |  |  | (5 | ) |  |  | (10 | ) |  |  | (10 | )
Amortization of transition asset |  |  | (2 | ) |  |  | (4 | ) |  |  | (4 | ) |  |  | (8 | )
Recognized net actuarial loss |  |  | 341 |  |  |  | 262 |  |  |  | 682 |  |  |  | 524 |
Net periodic pension cost |  | $ | 638 |  |  | $ | 519 |  |  | $ | 1,276 |  |  | $ | 1,038 |

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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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